GIMP/Print version 1

GIMP/Print version

Introduction

GIMP (GNU Image Manipulation Program) is an open-source image editing program, licensed under the GNUGeneral Public Licence. It can be used for editing electronic bitmap images like photographs. Whilst GIMP can editvector graphics such as SVGs other programs such as Inkscape or Adobe Illustrator are far more capable. GIMP, as afully functioning image editor, rivals other industry standard software such as Adobe Photoshop and Corel PaintShop Pro in terms of features such as multiple layers, the ability to resize and re-shape images, cropping, colourmanipulation, and so on.The project was started in 1995, and its first public release (0.54) was in January of 1996. Now, 13 years after itsfirst release, GIMP is used by a variety of people ranging from professional graphic artists, to computer hobbyists ofall ages who don't want to put down $700 for a copy of the newest Photoshop.Since its original release for Unix and GNU/Linux operating systems, GIMP has been ported to many majoroperating systems and platforms including Microsoft Windows and Mac OS X. GIMP requires the GIMP Toolkit(GTK), an advanced widget library created during the development of GIMP. If you download GIMP for anyplatform, you must first install GTK if it isn't installed already. Although this comes standard in most modern Linuxdistributions that ship with GNOME, it does not come standard with Windows nor Mac OS X. Additionally, GTKdoes not run fully native on Mac OS X and requires a special X Server package.Many image editing tutorials are available on the web. Some of the available tutorials can be used interchangeably,since the image-editing functionality provided by the GIMP and Photoshop or Paint Shop Pro are similar (imagescan be cropped, resized, colours altered, pixels erased, pixels added etc.). A moderately advanced GIMP user canfollow Photoshop tutorials as if they were written for the GIMP, and vice-versa except when the tutorial uses afeature that one of the programs does not support. However, following a Photoshop tutorial using the GIMP (or anyother image editor, in reality) as written can be difficult, or nigh impossible. Unfortunately, the GIMP lacks some

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features that are commonly used in Photoshop, such as adjustment layers (which, for example, may affect thebrightness or contrast of an image without permanently modifying it) and colorspaces other than RGB and grayscale(CMYK is essentially a necessity if you're wanting to print something). In most situations, luckily, these features dolittle more than just make your workflow a tad easier, thus there might just be a different way to achieve the sameresults.The current look of GIMP consists of 2 main windows - the image window and a toolbox. Also by default there'sanother utility window. The image window is always under the utility windows, but can easily go over by using theTab key.Note that if you want to start using the GIMP right away, right clicking an image window will open a menu thatgives access to most of the GIMP's editing tools and features. Obviously, all commands can also be accessed via thetoolbar at the top of the window of the image you're currently working on.You can find out a lot more about GIMP on its website, http:/ / www. gimp. org/ [1].

The Toolbox

Toolbox from GIMP 2.6

GIMP provides a comprehensivetoolbox in order to quickly performbasic tasks. Toolbox is fullycustomizable, this means that you canadd/remove any tool you want. Just goto "Windows > Dockable Dialogues >Tools", and select any tool you want.

By default not all tools are shown - GEGL operation tool and colour tools are omitted. All tools can also be accessedby opening the "Tools" menu. To switch the window to toolbox, you can use Ctrl + B. Note that shortcuts wrotehere are the default values - you can change them any time you want in "Edit > Keyboard Shortcuts"

ToolsThese tools are available by default in toolbox.

Icon Name Shortcut Description

Selection tools

Rectangle R Selects square or rectangular regions.

Ellipse E Selects circular or elliptical regions.

Free (Lasso) F Draw free-form selections.

Fuzzy (Magic Wand) U Select continuous regions of colour.

By Colour Shift + O Select all instances of a colour in an image.

Scissors I Create paths to select shapes.

Foreground (none) Select a region containing foreground objects.

Brush tools

Bucket Fill Shift + B Fills an area with a colour or pattern.

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Blend (Gradient) L Fills an area with a gradient.

Pencil N Paints hard-edged lines; that is, the pixels are not anti-aliased.

Paintbrush P Paints soft- or fuzzy-edged lines; that is, the pixels are anti-aliased and/or feathered.

Eraser Shift + E Erases pixels from a layer.

Airbrush A Paint tool with variable pressure.

Ink K Paints anti-aliased lines with a simulation of a nib.

Clone C Copies pixels from one part of an image to another.

Heal H Heals image irregularities.

Perspective Clone (none) Clone from an image source after applying perspective transformation.

Convolve (Blur/Sharpen) Shift + U Blurs or sharpens an image.

Smudge S Spreads pixels in the direction of a "push".

Dodge/Burn Shift + D Lightens or darkens an image's shadows, mid tones, or highlights.

Transform tools

Move M Moves layers and selections.

Align Q Align or arrange layers and/or other objects.

Crop Shift + C Crops or clips the image.

Rotate Shift + R Rotates the active layer, selection or path.

Scale Shift + T Scales the active layer, selection or path.

Shear Shift + S Shifts part of the image to some direction.

Perspective Shift + P Changes the perspective of the active layer, selection or path.

Flip Shift + F Flips layers and selections.

Other tools

Path B Allows selecting and modifying paths.

Colour Picker O Selects the colour of any image opened on your screen.

Magnify (Zoom) Z Alters the zoom level of the image.

Measure Shift + M Shows distances and angles.

Text M Places text into your image.

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There are also some other tools, hidden by default. These tools need to be accessed from the "Tools" menu, or byshowing them in toolbox (Windows > Dockable Dialogues > Tools).

Icon Name Shortcut Description

Colour tools

Colour Balance (none) Modifies the colour balance of current selection or layer.

Hue-Saturation (none) Adjusts hue, saturation and lightness.

Colourize (none) Renders current selection or layer into a grey scale image seen through coloured glass.

Brightness-Contrast (none) Adjusts brightness and contrast.

Threshold (none) Transforms the current layer or selection into a black and white image.

Levels (none) Changes the intensity range of the active layer or selection in every channel.

Curves (none) Changes the colour, brightness, contrast or transparency of the active layer or path.

Posterize (none) Reduces the number of colours.

Desaturate (none) Converts all colour to the corresponding shades of grey.

Other tools

GEGL operation (none) Executes a GEGL operation.

Tool options

By default, activating any tool, will have the effect of showing itsoptions under the toolbox. Each tool has its own set of settings andany changes to them are kept through the current session. There arealso four buttons under any options.

• Save options to... - save options of the current tool• Restore options from... - restore options from saved file• Delete saved options... - delete saved options• Reset to default values - reset the settings to default values.

You can hide them by clicking on the arrow next to the tool name and deselecting Show Button Bar. You can alsoaccess these from the same menu under Tool Options Menu.

Colour, Indicator and Active Image area

Colour, Indicator and Active Image areas respectively.

Below the toolbox can be placed these three areas. This is set in"Edit > Preferences > Toolbox" and any of the three can be hidthere.

Colour area

Shows current foreground and background colour. Clicking on either will bring up the colour editor dialogue.Clicking on the symbol in the lower left corner resets the colour to their defaults. The D key has the same effect.

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Clicking on the symbol in the upper right corner swaps the foreground and background colours. The X key has thesame effect.

Indicator areaShows currently selected brush, pattern or gradient. Clicking on any of these allows you to change it.

Active Image areaDisplays a thumbnail of the active image. Clicking on it will bring the Images dialogue up, allowing you the selectan image.

The Basics

Default gradient settings.

Shortcut: LThe GIMP Blend tool enables you to make gradients. Forinstance, a gradient may be a paint fill or stroke whichsmoothly blends from red to green. A gradient may havesudden changes as well. And a gradient may be applied toselections or opacities.

On the right side of the gradient dialog box, are the defaultsettings:

• Mode - you can select mode here (more information inthe Modes article)

• Opacity - set whether gradient will be transparent orfully visible

• Gradient - type of gradient• Offset - effects how far along the start colour in the

gradient begins• Shape - shape of gradient• Repeat - way of repeating• Dithering - helps reduce banding by dithering the

gradient.• Adaptive supersampling - try to refine the gradient in

high contrast areas. Choose how much difference is required before supersampling activates, and how hardGIMP tries to get good quality samples.

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OpacityThis bar controls the transparency of the gradient. Any value between 0.0 and 100.0 is possible with 100 being fullyopaque and 0 being fully transparent. The default value is 100.

GradientThere are hundreds of types of gradients in GIMP. Neons, flags, flares and much more. All of them have their owneffect, but only few use selected colours. Here's short description of them:• FG to BG (HSV anti-clockwise) - using HSV palette, moves counter-clockwise• FG to BG (HSV clockwise hue) - using HSV palette, moves clockwise• FG to BG (RGB) - using RGB palette• FG to Transparent - moves from foreground colour to transparent.

Next to it you can see a flip option ( ). It reverses the gradient direction. For example, Red to Green wouldflip to Green to Red.

OffsetGradient offset ranges from a default of 0, up to 100 percent. When offset is 0, the gradient begins at the start of theblending line. When offset is 50, the gradient begins at the halfway point in the blending line. Any earlier points arerendered with the same colour as the leftmost colour in the gradient. Setting offset to 100.0, which makes thegradient a solid (non-gradient) colour.

ShapeThere are eleven gradient shapes, clicking and dragging inside a selection makes the gradient follow its boundary.• Linear - Smoothly blends from left to right• Bi-linear - Smoothly blends to the left and right from the middle• Radial - Linearly blends outward along radius - pseudo-spherical appearance• Square - Linearly blends into a square from center to corner• Conical (symmetrical) - blends linearly with angle in a circular arc• Conical (asymmetrical) - blends linearly with arc, until reaching the starting radius• Shaped (angular) - formerly shapeburst, produces an angular beveled gradient• Shaped (spherical) - fills selection with a bulging beveled gradient• Shaped (dimpled) - fills selection with a puckered beveled gradient• Spiral (clockwise) - clockwise spiral blend centered at click, with varying amount of twist• Spiral (counterclockwise) - counterclockwise spiral

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Repeat

Example of triangular wave ( usingradial shape ).

There are three options for repeating:• None - no repeat• Sawtooth wave - once passing the end of the gradient, begins again at the

start• Triangular wave - once passing the end of the gradient, blends backwards

until the start, and then begins blending forward again..

You can use Repeat with these shapes: Linear, Bi-linear, Radial, Square, Conical(sym), Conical (asym).

DitheringDithering reduces banding patterns in the gradient. If your gradient includes deliberately banded areas, turn ditheringoff in order to preserve them. If the result must be very precise, consider turning dithering off also (dithering tradesspatial resolution for colour resolution, which is only good if you have spatial resolution to spare.)

Adaptive SupersamplingAdaptive supersampling identifies areas that seem to have high contrast and tries to improve the precision of therendering only at these points. The general effect is that areas of high contrast are smoothed out; One easy way to seethis is comparing the appearance of a 'sawtooth wave' repeated gradient with and without supersampling enabled.The options in this section allow you to control•• How much contrast is considered 'high contrast'•• How much GIMP will try to improve the sample quality before accepting the result (this comes into action when

the additional samples' relationship to each other is also considered as high contrast)See supersampling for a detailed explanation

The Basics

Move tool menu.

Shortcut: MMove tool is used for moving anything on the image,including layers, selections and paths.• Move - defines what will be moved• Tool Toggle - toggle between the two available modes

(for each option)

You can toggle between the two options with Shift(temporarily).

Move

You can choose what you want to move, as mentionedbefore it's either layer, selection or path.

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LayersTo move a layer, select this option. If the layers are grouped (chain symbol), all layers in the group will be moved.When this mode is selected, under tool toggle you'll see two options, "Pick a layer or guide" and "Move the activelayer". The first one will move the layer that you select and the second one will always move the active layer.

SelectionsThe move tool allows you to move the selection outline. It has no options in Tool Toggle.

PathsYou can also move paths with this tool. Note that path tool has its own tool for moving. To use move tool, make thepath visible in the path dialogue.

The Basics

Crop tool menu with default settings

Shift + CThe Crop tool can be used to crop or clip the image, working on alllayers of the image (both visible and invisible). It can be used forremoval of borders, or unwanted areas of the image to centre the focuson the work.To crop the image to selected size, double-click inside the box, or pressEnter. The crop box can be resized by dragging at the edges andcorners. To move it, click and drag on the crosshairs at the centre.

• Current layer only - works only on the current layer• Allow growing - allows to expand beyond borders• Expand from centre - expands selection, using starting point as the

centre, instead for the corner• Fixed - allows you to modify the actual shape of rectangle• Position - placement of the selection to crop• Size - size of the selection to crop• Highlight - highlights the actual selection, by darkening everything

that surrounds it• Guides - select the types of guides shown within of selection• Auto Shrink - shrinks the selection to the nearest rectangular shape

available on the image layer• Shrink Merged - if this option is enabled, then Auto Shrink will use

the pixel information from the visible display of the image, ratherthan from the active layer

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Current layer onlyCrop tool will only work on the currently selected layer, instead of working on all existing.

Allow growingAllows Crop tool to expand beyond borders of the image/layer, and crops along with the outside area.

Other optionsAll other options work as described in ../Rectangle Selection/ article. See sections #Expand from centre to #Shrinkmerged

The Basics

All seven selection tools.

There are 7 selection tools. Each has its own properties, but all have somethingin common. All of these common options will be described here, while theirvariations on the tools pages. The tools are:

• Rectangle Select Tool

• Ellipse Select Tool

• Free Select Tool (Lasso)

• Fuzzy Select Tool (Magic Wand)

• Selection by Colour Tool

• Scissors Select Tool

• Foreground Select Tool

Basic options.

The paths tool can be considered as a selection tool, but itdoesn't share any options. It can be used as a tool for creatingcomplex selections, especially ones that follow naturalcurves. To convert a path to a selection you can use Select >From Path (Shift+V).

There is also a quick mask mode, used for creating andediting selections using the paintbrush or any other drawingtools. It can be found under Select > Toggle Quick Mask(Shift+Q).

The common options are:• Modes - determines the way of creating the selection, whether it will be combined with existing one and such• Anitaliasing - causes the boundary of the selection to be drawn smoother• Feather edges - causes the boundary of the selection to be blurred

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ModesModes determine whether the selection will be added, subtracted or intersected from existing one, or either replaceit. Functions performed by these button can be duplicated using modifier keys, as described later. Many people findthis very useful.

• Replace - default mode, replaces the existing selection• Add - adds a new selection to the existing one• Subtract - removes the new selection from already existing region• Intersect - makes a new selection from the region when both the new and old one overlap

AntialiasingThis option only affects few of selection tools. It causes the boundary of the selection to be drawn more smoothly.

Feather EdgesFeather Edges blurs the boundary, by selecting the boundary pixels only partially. This allows the selection tosmoothly blend with the background.

Key modifiers (defaults)The behaviour of selection tools can be modified by holding down Ctrl, Alt and Shift.

• Ctrl - has two options depending on what you are doing• while creating a selection toggles Expand from centre option• while doing nothing, this key switches to Subtract mode, as long as you hold it

• Alt - allows movement of the current selection (only its frame, not content). If the image is moved instead, tryShift + Alt

• Shift - similarly to Ctrl, it has two options depending on what you are doing• before starting a selection, this key will switch to Add mode, as long as you hold it• after starting a selection, it will depend on tool you are using - for example for Rectangle Selection, it will

create a square selection• Ctrl + Shift' - depending on which tool is used, different thing will happen. A common option however is

switching to Intersect mode• Ctrl + Alt + Click-and-drag and Shift + Alt + Click-and-drag - allows movement of the current selection

(its content)• Space bar - transforms the tool to Navigation cross as long as you press the bar, allowing you to pan around

the image, instead of using scrollbars. In Preferences > Image Windows you can toggle the Space bar to theMove tool

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The Basics

Default rectangle selection tool settings.

Shortcut: RThe rectangle selection tool is a simple but useful tool. It allows you tocreate rectangular selections.

• Modes - determines the way of creating the selection, whether it'll becombined with existing one and such

• Antialiasing - causes the boundary of the selection to be drawnsmoother

• Feather edge - causes the boundary of the selection to be blurred• Rounded corners - rounds the corners of the selection• Expand from centre - expands selection, using starting point as the

centre, instead for the corner• Fixed - allows you to modify the actual shape of rectangle• Position - placement of the selection• Size - size of the selection• Highlight - highlights the actual selection, by darkening everything

that surrounds it• Guides - select the types of guides shown within of selection• Auto Shrink - shrinks the selection to the nearest rectangular shape

available on the image layer• Shrink merged - if this option is enabled, then Auto Shrink will use

the pixel information from the visible display of the image, rather thanfrom the active layer

Modes, Antialiasing and Feather EdgesSee Selection Tools#Modes for information about Modes

See Selection Tools#Antialiasing for information Antialiasing

See Selection Tools#Feather Edges for information about Feather Edges option

Rounded cornersA slider appears after enabling this option. Use it, to change the radius that is used to round the corners

Expand from centreAfter enabling this option, the starting point is used as the centre of the selection instead of using it as a corner. Thisalso causes that the selection is extended from all sides. This option can be enabled with Shift.

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FixedThis option allows you to modify the shape of rectangle in four ways:

• Aspect ratio - allows you to desing the selection, while keeping the aspect ratio fixed. By default it is 1:1,which makes a square. There are two little icons next to it (landscape and picture)

• Width - you can fix the width of the selection• Height - you can fix the height of the selection• Size - you can fix both, width and height of the selection

PositionThe actual placement of the current selection. This will show the placement of upper left corner, or centre, if Expandfrom centre option is enabled. You can use it to modify

SizeThe actual size of the current selection. You can use it to modify the size, as well as resizing it directly on the image.

HighlightEmphasizes the selected area by a surrounding mask, making the visual selection much easier.

GuidesIn here you can set what guides will be shown within the selection, respecting Photo composition rules.

• No guides - no guides are shown• Centre lines - only the centre lines are visible• Rule of thirds - guides are shown along the rule of thirds• Golden sections - guides show up to mark the golden sections

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Auto ShrinkAfter pressing this button, already having a selection, it will shrink to the nearest rectangular shape within theselection. The algorithm for finding the best rectangle, can once do a great work, and sometimes find some strangerectangles.

Shrink mergedIf this option is enabled Auto shrink will look on the actually visible image, rather than the active layer.

The Basics

Default ellipse selection tool settings.

Shortcut: EEllipse selection is quiet much as the rectangle one. The only difference isthe fact that it has one option less - rounded corners, as it is ellipticalselection so for what. As the name suggests it is made for creatingelliptical and circle selections, with option high quality antialiasing.

• Modes - determines the way of creating the selection, whether it'llbe combined with existing one and such

• Antialiasing - causes the boundary of the selection to be drawnsmoother

• Feather edge - causes the boundary of the selection to be blurred• Expand from centre - expands selection, using starting point as the

centre, instead for the corner• Fixed - allows you to modify the actual shape of rectangle• Position - placement of the selection• Size - size of the selection• Highlight - highlights the actual selection, by darkening everything

that surrounds it• Guides - select the types of guides shown within of selection• Auto Shrink - shrinks the selection to the nearest rectangular shape

available on the image layer• Shrink merged - if this option is enabled, then Auto Shrink will use

the pixel information from the visible display of the image, ratherthan from the active layer

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Modes, Antialiasing and Feather EdgesSee Selection Tools#Modes for information about Modes

See Selection Tools#Antialiasing for information Antialiasing

See Selection Tools#Feather Edges for information about Feather Edges option

All other optionsSee Rectangle Selection for information about the tool as everything works completely (or almost completely) thesame. The only difference is existence of rounded corners option in Rectangle Selection - there is no need for ithere.

The Basics

Default free select tool settings.

Shortcut: FFree selection tool (also called 'Lasso') let's you create aselection by drawing it free-hand (with the pointer andholding down the left mouse button, of course). It is the onlyselection tool, that has nothing more than the basic options.The selection is finished with a straight line and it actuallypossible the create straight lines by clicking (not holding!)on one point and making another one somewhere away fromit.

• Modes - determines the way of creating the selection,whether it'll be combined with existing one and such

• Antialiasing - causes the boundary of the selection to be drawn smoother• Feather edge - causes the boundary of the selection to be blurred

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Modes, Antialiasing and Feather EdgesSee Selection Tools#Modes for information about Modes

See Selection Tools#Antialiasing for information Antialiasing

See Selection Tools#Feather Edges for information about Feather Edges option

The Basics

Default fuzzy selection tool settings.

Shortcut: UFuzzy selection (also called 'magic wand') is a tool forselecting areas of image (or layer) with the same/similarcolour. It is very important to pick the starting pointcorrectly, or either you will get something completelydifferent from what you want (well, not always, but usuallyyes). Wand is a good choice for selecting objects with sharpedges. It is also great for touching up selections, or selectingareas within some contour.

• Modes - determines the way of creating the selection,whether it'll be combined with existing one and such

• Antialiasing - causes the boundary of the selection tobe drawn smoother

• Feather edge - causes the boundary of the selection tobe blurred

• Select transparent areas - gives the ability to selectareas completely transparent

• Sample merged - creates a selection from actualimage, instead from the active layer

• Threshold - determines the range of colours• Select by - select, which component shall be used for calculating the similarity

Modes, Antialiasing and Feather EdgesSee Selection Tools#Modes for information about Modes

See Selection Tools#Antialiasing for information Antialiasing

See Selection Tools#Feather Edges for information about Feather Edges option

Select transparent areasAfter selecting this option, the Free Selection tool will have the ability to select completely transparent areas. If thisoption is unchecked, transparent areas will never be selected.

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Sample mergedThis option has any meaning when you have several layers on the image, and the active layer is eithersemi-transparent or set to another mode than Normal. If it is so, the colours present in the layer, will be differentfrom the ones in the real image.

ThresholdThis slider determines the range of colours that will be selected at the moment of creation of the selection. Higherthreshold - larger resolution. Note that with higher selection also bigger gaps are possible to be between theselections. After the first button-press (but before releasing it), dragging the pointer downward (or to the right) willincrease the size of the selection, while dragging upward (or to the left) will decrease the size of it. Thus the firstsettings of threshold do not really matter, as you can modify them any time afterwards.

Select byThis option will change the component that The GIMP will use for calculating the selection. The possiblecomponents are: Composite. Red, Green, Blue, Hue, Saturation and Value.

The Basics

Selection by colour tool settings.

Shortcut: Shift + OSelect by colour works really similar to the Fuzzy Selectiontool. The main difference is that when magic wand makesselection with no real gaps, selection by colour takes all thepixels with similar colour, regardless to where they arelocated.

• Modes - determines the way of creating the selection,whether it'll be combined with existing one and such

• Antialiasing - causes the boundary of the selection tobe drawn smoother

• Feather edge - causes the boundary of the selection tobe blurred

• Select transparent areas - gives the ability to selectareas completely transparent

• Sample merged - creates a selection from actualimage, instead from the active layer

• Threshold - determines the range of colours• Select by - select, which component shall be used for

calculating the similarity

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Modes, Antialiasing and Feather EdgesSee Selection Tools#Modes for information about Modes

See Selection Tools#Antialiasing for information Antialiasing

See Selection Tools#Feather Edges for information about Feather Edges option

All other optionsSee Fuzzy Selection for information about the tool as everything works completely (or almost completely) the same.

The Basics

Default scissors tool settings.

Shortcut: IScissors is an interesting selection tool. It has some featuresof lasso, some features of paths tool and some of its own. Itis useful for selecting a region defined by strong colourchanges at the edges. To use scissors, you need to create aset of 'control nodes' (also referred to as anchors), at theedges of the region you are willing to select. The tool createsa curve trough these nodes, following any high-contrast itcan find. Each time you press left mouse button, you create anew anchor that is connected to the last control node by acurve. If you want to finish the selection, just press on thefirst node you've created. After that you can adjust theselection by modifying the curves or by moving/creatingnew nodes. When you are satisfied just press anywhere inside of the selection to create it.

• Modes - determines the way of creating the selection, whether it'll be combined with existing one and such• Antialiasing - causes the boundary of the selection to be drawn smoother• Feather edge - causes the boundary of the selection to be blurred• Interactive boundary - the curves will be created instantly after creating a new node

Modes, Antialiasing and Feather EdgesSee Selection Tools#Modes for information about Modes

See Selection Tools#Antialiasing for information Antialiasing

See Selection Tools#Feather Edges for information about Feather Edges option

Interactive boundaryWhen this option is active, the curves between nodes will be really curves. Normally (when the option is disabled)there will be only straight lines until you finish the selection.

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The Basics

Default foreground selection tool settings.

Shortcut: noneThis tool lets you extract foreground from the active layer, using theSIOX method. To create a selection, set roughly foreground you wantto extract. Select as little of the background as possible. As soon asyou're finished (the selection is closed) the rest of the image goes dark.Now draw the line trough the foreground, going through all coloursthat will be used for extraction. Then after releasing the mouse-button,only the actual foreground is selected. Remember to press Enter afterfinishing the selection, or you could actually loose it.

• Modes - determines the way of creating the selection, whetherit'll be combined with existing one and such

• Antialiasing - causes the boundary of the selection to be drawnsmoother

• Feather edge - causes the boundary of the selection to be blurred• Contiguous - if this option is enabled, only area contiguous to

the stroke is selected• Interactive refinement - settings for the brush• Smoothing - controls the smoothness of selection• Preview colour - colour of the selection background• Colour Sensitivity - set the sensibility for colours of the

selection

Modes, Antialiasing and Feather Edges

See Selection Tools#Modes for information about Modes

See Selection Tools#Antialiasing for information Antialiasing

See Selection Tools#Feather Edges for information about Feather Edges option

ContiguousWhen this option is enabled, only areas contiguous to the stroke will be selected. When this option is not enabled, allareas of the same colour in the rough selection will be selected.

Interactive refinementThe following options are for controlling the brush of foreground select tool.

Mark foreground/backgroundWhether foreground or background colour will be used for the stroke. Ctrl is used to toggle between those.Remember! background colour is used for erasing.

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Small/Large brushThis slider lets you adapt the size of the brush. Small brush is good for details, while large is good for generalforeground selection.

SmoothingThis slider lets you to remove holes in the selection. Also remember - smaller values may create a better border butinclude these holes in the selection.

Preview colourSelected colour will be used to mask the image background. Possible options: red, green, blue.

Colour sensitivityThis option uses L*a*b colour model. If your image contains many pixels of the same color in different tones, youcan increase the sensibility of the selection for this colour.

The Basics

Default colour picker tool settings.

Shortcut: OOn the right side you can see default settings for colourpicker. Here's short ( and then long ) description abouteverything there:

• Sample average - set whether to pick average valuefrom pixels

• Sample merged - set whether all samples to bemerged

• Pick mode - modes• Use info window - set whether you want to see the

info window

Sample Average

That's the first option, by default unchecked. When in use, itwill take all pixels from some radius (number of pixels ineach direction), and pick the average value. The radius valueis by default set to 3, but can be anything between 1 to 300.

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Sample MergedTakes colour information from all visible layers.

Pick Mode

The info window.

There are four modes in the colourpicker tool. Here are their descriptions:

• Pick only - only picks a colour,doing nothing to it (informationdialogue must be turned on);

• Set foreground colour - pickedcolour is used as foregroundcolour;

• Set background colour - pickedcolour is used as backgroundcolour;

• Add to palette - adds the colourto the palette, especially usefulwhile creating palettes;

Ctrl switches between Set foregroundcolour and Set background colour,when either of these is active.

Info WindowShows an info window, with two columns of information - you can choose for both of those these options: pixel,RGB, HSV and CMYK, with pixel and RGB being active by default. Shift toggles it on and off.

Zoom Tool

Magnify tool menu.

Shortcut: ZZoom tool is used for magnifying a selected part of theimage.First option is called Auto-resize window. By default it'sdisabled, by enabling it, it will resize the window accordingto the size of the magnified area.

Underneath are two other options, for zooming in or out. Asmentioned later, you can toggle between those two using akeyboard shortcut.By selecting an area of the image, you can zoom in/out onthat area.

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Key Modifiers (defaults)

Ctrl - changes direction of zooming;Ctrl + Mouse Wheel - spinning the mouse wheel, without clicking, varies the zoom.

Measure Tool

Measure tool menu.

Shortcut: Shift + MThe measure tool measures length of the visible line, width,height and angle shown in the status-bar.In the tool options there is a check-box Use info window, ifchecked a window will show itself when you beginmeasuring providing you with the same details as before.Use info window is disabled by default.

Key Modifiers (defaults)

Shift - starts a new measure from the point the lasts end, without deleting the old one;Ctrl - puts the tool into straight line tool, also creates a horizontal guide;Alt - creates a vertical guide;Ctrl + Alt - allows to move the measure, also creates both horizontal and vertical guide.

The Basics

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Default text settings.

Shortcut: TThe text tool is used for creating and editing text layers. On theright side you can see default settings for text tool. Here's short (and then long ) description about everything there:

• Font - select the font you want to use• Size - set the size (height) of the font• Hinting - modifies the characters to produce clear letters in

small font sizes• Force auto-hinter - tries to automatically compute

information for better representation of the character font• Antialiasing - renders the text smoother• Colour - the colour of the text• Justify - set the justification of the text• Indent - controls the indent spacing from left margin• Line spacing - controls the spacing between the lines of text• Character spacing - controls the spacing between the

characters• Text along Path - puts the text along path• Path from Text - creates selection path from selected text

Font

There's only one way for selecting a font in the GIMP. To do so usethe font selector in this tool

SizeTo set the size of the font just enter a value in the box, or use the arrows. You can choose from few units, by defaultin pixels, size of 18.

HintingUsing the indices of adjustment, modifies the characters, to make them look clear in small sizes.

Auto-hinterAuto-hinter, tries to automatically compute information to make a better representation of the character font.

AntialiasingSee Antialiasing for more information

Renders the text with smoother edges and curves. This option can improve the visual appearance of the renderedtext.

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ColourColour of the text, default is black. The colour of the text when writing, won't change instantly. You need to rewritethe text in that colour, or select the text and change it then.

JustifyJustifies the text according to the selected option. The options are:

•• Left justified•• Right justfied•• Centered•• Filled

IndentControls the actual spacing from left margin. By default set to 0.0

Line spacingSpacing between lines. By default set to 0.0, although the spacing is not in fact 0 pixels then. The value can go under0.

Character spacingSpacing between characters. By default set to 0.0, behaves the same as line spacing settings.

Text along PathYou need to create a path before. The path becomes once visible when using this option. The text is bent along thepath, representing letters with their outline. Each of them is a component of the new path. All path options shouldapply to this path.

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Path from TextCreates selection, using the text. Every letter is surrounded with paths, so you can modify the shape of it, by movingthe nodes.

Text editor

Text editor window.

This dialogue is opened when you click with text tool onthe image window. The text you enter directly appears onthe image. If the option "Show Layer Boundary" is checkedin the view menu, the layer will be surrounded with blackand yellow dashes. You can easily move the text with theMove tool, but you need to click on the text - it's notselection. As soon as you start writing, the layer appears inthe layer dialogue. After that you can easily resume the text,if you are still editing the image, or if it is an .xcf file. Toadd more text to the image, click on a non-text layer, andnew text editor appears.

So there are these five options there:• Open - loads the text from a file• Clear - clears the text area• LTR - the text will be entered from left to right• RTL - the text will be entered from right to left• Use selected font - whether it will use the font from

options dialogue

OpenUsing this option, you can directly load the text from a file.

ClearClicking this icon, will cause erasing all text from the text area.

LTR and RTLLTR - the text will be entered from left to right, as with most Western and Eastern languagesRTL - the text will be entered from left to right, as with all Arabic and some Eastern languages

Use selected fontBy default the font from the options dialogue is not used. Check this option if you want to use it.

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Editing an Image

Image OperationsImage operations not offered in the toolbox are accessed by right-clicking on the image. In Gimp 2.0, there is also anoption to display this menu at the top of the screen. (This option is now default)Right-click on the image to access the menus. For example, Right-click, File, Save is used to save the image. PNGor JPEG formats are available for use on Wikipedia. To decrease a JPEG's filesize, adjust the Quality slider whenyou save.Often, it's useful to get info on an image you're editing. To do this, right-click on the image to bring up the menu,and then choose Image > Image Properties, or hit Alt-Enter. The first three properties are very important forprinting: Pixel Dimensions, Print Size, and Resolution.

An Image Properties box.

Image > Canvas size is used to adjustthe size of image dimensions, but doesnot attempt to scale the image.

Image > Scale image is used tochange the size of the image, forexample to create thumbnail images.

To remove a section of image, justselect it (using one of the select tools)and press Control-K ("kill", same asusing Edit > Clear). This will eithererase the selection to the backgroundcolour, or to transparency if the imagesupports it.

Colours andTransparencyGIMP can understand a number of different colour formats with a varying degree of support. It supports three socalled modes: RGB, grayscale, and indexed.

To change the mode of the image, choose in the menu from <Image> Image > Mode > ....

Colour ModesGIMP supports the following color modes:• True Colour (RGB): This has the best support in GIMP. It is made up from 3 channels of 256 tonal variants,

making a total of 16.7 million colours - 256 * 256 * 256.Supported formats: XCF, PNG, TGA, TIFF, SGI, BMP.• Grayscale: The grayscale mode uses one channel to display a gray image. GIMP supports grayscale well and is

usable for most tools that don't specifically require colour information.Supported formats: XCF, PNG, TGA, TIFF, SGI.• Indexed: In this mode, the image consist of pixels picked from a palette of up to 256 colours.When you convert an image into this mode, or when you are reducing the color depth of an image, dithering options give you control over how colours are scattered. For the best quality results (especially with pictures that have

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gradual tonal variance) use Floyd-Steinberg dithering: it will give a grainy texture to the picture, but reduce visiblebanding between different colours. On the other hand, reduced or no dithering will result in smaller files when savedas GIF or PNG.Supported formats: XCF, PNG, GIF, BMP.• Monochrome: Two colours, often black and white. GIMP sees this as an indexed image with only 2 colours.Supported formats: XCF, PNG, GIF.Menu items for color modes:• Image > Mode > RGB• Image > Mode > Grayscale• Image > Mode > Indexed

Alpha ChannelRegardless of the mode, images can have an optional alpha channel for transparency. An image with an alphachannel can have transparent and semitransparent pixels, the degree of transparency of each pixel ranging from 0 to255. Using transparency enabled by alpha channel, you can create a picture by stacking several layers on top of eachother, save images for the web, or create images for 3D graphics that have holes or semi-opaque areas.Formats that fully support alpha channel: XCF, PNG, TIFF, TGA, SGI. Formats that only support alpha channel asfully opaque or fully transparent: GIF, XPM.Only Internet Explorer versions later than version 7 support transparency. Internet Explorer 6 and earlier do not.Menu items for alpha channel:• Layer > Transparency > Add Alpha Channel• Layer > Transparency > Remove Alpha Channel• Layer > Transparency > Add to Selection

Colour Filter/ToolsImage, Mode, Decompose will split a colour image into a set of greyscale images, based on various colour models.Image, Mode, Compose does the opposite, combining greyscale images into colour ones. Striking effects may beobtained by recombining channels in a different model or order than they were decomposed in.A number of colour adjustments can be found under <Image> Colours, and colour effects under <Image> Filters,Colours

Saving the ImageThis shows a typical image editing window in the GIMP (this is version 1.2, more recent versions will have a set ofmenus at the top of the image window) Right-click, File, Save is used to save the image. A filetype can be selected(png, jpeg, etc.) from the dropdown list, but the default action is to use whatever extension was typed (specifying"image.jpg" causes it to save a JPEG file)After the filename is specified, there is an additional dialog box specific to each filetype. For example, a JPEG imagewill ask you for the compression level, and it can be useful to adjust this until the image is a reasonable filesize.

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Image formats Supported by GIMPas of GIMP 2.2.13

Significant file formats

FileFormat

Extension(s) Description

XCF .xcf/.xcf.gz/.gz/.xcfgz/.xcf.bz2/.bz2/.xcfbz2/.gbr/.gih/.pat

GIMP's native format which will preserve all image data, including layer, the current selection, channels,transparency, paths and guides, but it doesn't save undo history. XCF images take up a lot of space, and arenot supported by most image viewers, which is why XCF is only good for saving images for future editing(not for image exchange). There is also an option to compress the XCF by using either gzip (usingxcf.gz/gz/xcfgz extension) or bzip2 (using xcf.bz2/bz2/xcfbz2 extension) compression. GIMP's other nativeformats include GIMP Brush (.gbr), GIMP Animated Brush (.gih), and GIMP Pattern (.pat).

BMP .bmp/.dib Bitmap is an uncompressed image format, which is the internal image format for Windows and OS/2Graphic Subsystem.

GIF .gif Graphic Interchange Format is often used for screenshots and computer graphics. It is lossless if the imagehas under 256 color or otherwise it become lossy. It allows transparent mask, which means a pixel can onlybe fully transparent or fully opaque, and not partially transparent.

HTML .htm/.html Hypertext Markup Language. GIMP will save in HTML as a HTML page that contains a table containingthe image.

ICO .ico Icon Image File Format is Windows' image format for icons.

JPEG .jpg/.jpeg/.jpe Joint Photographic Experts Group is typically used for photographs. It uses lossy compression that results ina loss of detail, commonly called artifacts. The artifacts are usually most noticeable on images that havesharp edges, while less noticeable on photographs, which have many smooth gradients.

PNG .png Portable Network Graphic is often used for screenshots and computer graphics. It uses lossless compression.It allows full alpha transparency.

PNM .pnm/.ppm/.pbm/.pgm/.pam

Portable Pixmap. PNM (Portable Any Map, a shorthand for ppm, pbm, and pgm format), PPM (PortablePixel Map), .pbm (Portable Bit Map), .pgm (Portable Gray Map) and .pam (Portable Arbitrary Map).

PS andEPS

.ps/.eps Postscript Document and Encapsulated Postscript

PSD .psd Photoshop Document, the native format of another popular graphic editing software, Adobe Photoshop.

TGA .tga Truevision Graphics Adapter, Targa's native image format.

TIFF .tif/.tiff Tagged Image File Format

XBM .xbm X Bitmap 2-bit, Monochrome Bitmap for X Window System

XPM .xpm X Pixelmap Color Bitmap for X Window System

Other less popular image format also supported by GIMP:

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Extension(s) Description

.pix/.matte/.mask/.alpha/.als Alias/Wafefront Pix Image

.fli/.flc Autodesk FLIC Animation

.c/.h C/C Header Sourcefile Format

.dcm/.dicom Digital Imaging and Communications in Medicine Image

.fit/.fits Flexible Image Transport System

.cel KISS Cel

.sgi/.rgb/.bw/.icon Silicon Graphic IRIS Image

.im1/.im8/.im24/im32/.ras/.rs SUN Rasterfile Image

.pcx/.pcc ZSoft PCX Image

.xwd X Windows Dump

Other file formats that GIMP can only read, but not write:

Extension(s) Description

.g3 G3 Fax Image

.wmf/.apm Microsoft WMF File

.psp/.tub Paintshop Pro

.pdf Printable Document File

.svg Scalable Vector Graphic

.fit/.fits Flexible Image Transport System

GIF imagesThe Unisys patent has now expired and in recent versions of the GIMP you should be able to save compressed GIFimages using GIMP.If your version will not save GIF files and it is updated, you may want to update the corresponding image librariesfor GIF.

Saving as JPEGWhen saving as a JPEG, you should let the image itself dictate the quality rather than reusing settings. The samesettings for one image may produce significant loss on another.

Basic SettingsQuality: the overall quality of the output JPEG. The lower this value is the more compression you'll attain, at a costto visual quality. Generally you'll want the lowest quality with no significantly noticeable loss. Start at the defaultand adjust to the best compromise for the image.You shouldn't usually go above 95, as the size grows significantly for no noticeable quality gain. Likewise, youshouldn't go below ~25 as banding may occur.The “Show Preview in image Window” option creates a new layer with how the image will look with the currentsettings. It updates in real-time as you change the settings. You can zoom or hide as usual to get a better look at thequality.

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Advanced SettingsThese can be uncollapsed by selecting the box next to “Advanced Settings” and are saved for the current session,along with most other saving settings.

Lossy

These settings alter the actual image to help with compression. Changing these will change the overall subjectivequality of the image.Force Baseline JPEG:Enabling this option will force Gimp to make a JPEG which can be read with all decoders, often at a loss to qualityand size, especially at lower quality settings.Smoothing:Setting the smoothing option to a non-zero value will smooth out the image slightly. This reduces fuzzy artifactsfrom compression, and helps with the compression. A setting of 0.10-0.15 removes a good portion of the artifactswithout smearing edges.Subsampling:Gimp allows three subsampling modes. Subsampling discards more colour information (which is harder to discern)compared to luminance. Subsampling improves image compression at a cost to image quality, sometimes asignificantly noticeable loss (such as on red), or no noticeable difference at all. Subsampling on an image where itshouldn't be used will smear the detail, most noticeably on sharp edges. If you notice significant loss with thedefault, you can turn it off by selecting "1x1x1x1", which is technically no subsampling.DCT Method:The 'Floating' DCT method produces slightly better results than the 'Integer' method with a slight cost to speed. 'FastInteger' should only be used where speed is imperative.

Lossless

The following settings can losslessly be set; they don't affect the image's quality in any way.Optimize:Optimizes the images table for a gain in compression. Unless speed is a concern, there's no reason to turn it off.Comment:If you wish, a comment of your choosing can be set for the image, such as the quality settings, or a synopsis of howthe image was made.Save EXIF Data:Some cameras save information about the image, such as when it was taken or even if the flash was on. If you haveno need for this information in the image you can safely turn it off.When saving an image that has no EXIF data present the option will be grayed out.Save Thumbnail:The JPEG format allows for a thumbnail of the image to be saved into the actual file itself. Most software using athumbnail can generate one of its own and saving your own is unnecessary, as well as adding several kilobytes to theimage size.Progressive:Selecting Progressive will change the encoding to display the image at increasingly higher quality levels until theimage is fully loaded. Progressive encoding also benefits the image's compression.Leaving this option unchecked will switch to Standard encoding, where the image is displayed in rows from top tobottom.

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Restart Markers:Restart markers are useful when data corruption can occur; the image will only be corrupt up until the next marker.Setting this higher increases the frequency of restart markers at a cost to filesize. Without restart makers, if anycorruption occurs, the entire file can be compromised.

LayersLayers in the GIMP are a powerful tool allowing you to do many things. A good way to think of them is as layers ofglass stacked up. Layers can be transparent, translucent or opaque.

The Layer DialogGo to Windows > Dockable Dialogs > Layers to open the layers dialogue. This dialogue is useful when editing withlayers.

StartingOpen up the layers dialogue, and add as many layers as you like to the image. Note that any image editing or filterswill only apply to your currently selected layers.

TransparencyThe Opacity slider controls the transparency or opaqueness of a specific layer. This will not affect the internal alphachannel of the layer.

Layer MaskA layer mask is a grayscale layer that controls the local transparency of a layer. This is useful for non-destructivelydeleting part of a layer, or only making part of a layer visible.

Using a Layer Mask to selectively edit an imageA layer mask is a very useful tool if you only want to edit part of an image. First duplicate the layer that you want toedit. Then make your changes to the bottom layer. Now add a black layer mask to the unchanged layer. Then use thewhite paint brush on the layer mask, to restore parts of the original version. A black area in a layer mask will havezero opacity, while a white (RGB 255,255,255) area will be completely opaque.

ChannelsChannels are very similar to layers, however, each layer corresponds with a particular level in the color model of theimage (RGB, HSV or CMYK). Channels can be selected in any combination, and are shaded gray if currently active.You can also view and edit the channels separately, making changes to a single color while viewing the full-colorimage in your image window. Choosing what channels to display is done the same way as choosing what layers todisplay. Simply click the box next to it, and an eye will appear, indicating that the channel is displayed. Keep inmind, a channel can still be edited even if it is not displayed. This can lead to problems if you don't catch it early, andmay require undoing a large number of edits to fix.At the time of this writing, GIMP only supports the RGB (Red, Blue, Green) and the HSV (Hue, Saturation, Value)representation of the color model. CMYK isn't natively supported by GIMP, but a plug in giving some functionalityis available at the website below.http:/ / www. blackfiveservices. co. uk/ separate. shtml

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The GIMP also supports the adding of custom channels allowing for even more advanced editing.

DecomposeThe Decompose tool will decompose a colour image into a series of grey scale layers. This allows you to edit theimage in many different colour models.

DecomposeGo to Colours > Components > Decompose. This will bring up the Decompose Dialog.The Decompose window looks like this:

Select the colour model that you wish to use from the drop down menu that matches the colour model you wish tosplit to.

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RecomposeWhen done editing your image, select Colours > Components > Recompose, to recompose the image back into anRGB Image. When saving to the XCF format, the layers will be preserved.

Levels ToolThe levels tool is an easy and powerful tool for adjustingthe tones of an image. It allows more precise control ofcontrast than the Brightness-Contrast tool, but doesn'tgive the user the complete control of Curves.

Input Levels

Input levels control the contrast of the picture. The endpoints control the black points, and the white points. Theeyedropper buttons next to the black and white inputlevel markers allow black and white points to be selectedin the image. The middle pointer can be used to selectedthe gamma correction value for the image.

This tool can be used to simulate setting a white point.For images such as Image:PSF B-70002.png, setting awhite point is critical in extracting useful images such asImage:Backstroke (PSF).png.

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Curves ToolCurves is a powerful tool found in The Gimp, it can beused for many things, such as fixing a colour cast.

To use the curves tool, go to <Image> Tools > Colour Tools > Curves and you should see a window similar to this:You can adjust the "Value" channel, which will brighten/darken the image depending on whether you drag the lineup or down. Down will darken, up will lighten.You can also adjust the Red, Blue, Green, and Alpha channels.If your picture has a green colour cast, open up Curves, switch to the green channel, then move the line toward thebottom a little bit, until the cast is gone.You can also switch the curve style, from smooth to jagged.

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Gaussian BlurThe Gaussian Blur filter blurs an image or selection.

The Gaussian Blur filter can be found by going to<Image> Filters > Blur > Gaussian Blur.

The radius affects the strength of the blur. Besides for creating a fuzzyimage, the Gaussian Blur has a few other uses. If you are working onan image with edges which one deems to be overly rough, one coulduse a blur radius of 1 to soften the image slightly, yet less dramaticallythan using a larger radius or the standard Blur filter. It is also veryuseful for a variety of image effects, such as shadows.

An example of the dialogue window of theGaussian Blur filter. It contains a preview of an

image with the blur radius set to 5.0.

IIR vs. RLE

The filter supports two methods of Gaussian Blur: IIR and RLE. Theyboth produce the same results, but each one can be faster in somecases.IIR (Infinite Impulse Response) works best for large radius values orfor images which are not computer generated, such as photographs.RLE (run-length encoding) works best for computer-generated imagesor those with large areas of constant intensity, such as logos.

Selective Gaussian Blur

The Selective Gaussian Blur filter will selectively apply a GaussianBlur to areas of a picture with less detail, leaving the areas with detailuntouched. This can be used for cleaning up noise in a picture.

Pixelize

An example image of the effect.

Pixelize filter is for pixelizing the image, as the name suggests. The onlything you can set there is size of those "pixels". Default value is 10x10.

Unsharp MaskThe Unsharp Mask filter performs a better job than the standard Sharpenfilter by applying the sharpening selectively to a blurred version. UnsharpMask tends to leave noisy sections of the image untouched.Sharpening is a very desirable effect on blurry images or those which havebeen rescaled. Things are naturally sharp in your vision.

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An example of the dialogue window of thePixelize filter. It contains a preview of an image

with the pixel size set to 10x10

Note that the Unsharp Mask, like all other sharpening methods, willproduce an aura around the edges if set too high.

Sharpening Basics

Image before sharpening

The exaggerated effect of the unsharp mask filter.Radius: 8, Amount: 2, Threshold 0, Zoom 400%

Unsharp mask increases the apparent sharpness of image by increasesthe contrast around edges. Dark patches near lighter areas get darker,and light patches near dark areas get lighter.

Filter Settings

Radius: The radius of the blur before the filtering. Where a value verylow (0.1) will get similar effects as the standard sharpening filter,setting this higher removes noise and increases the contrast of thesharpening. Setting the blur radius too high, however, will have aneffect similar to the Posterize tool.

Amount: The amount of sharpening to apply to the image. A usefulvalue other than the default is 0.35, where it's usually not enough toproduce a significant aura on edges.

Threshold: Helpful when the picture you are working with is verynoisy. To avoid sharpening of noise in the image you can set thethreshold level higher.

Fractal ExplorerFractal explorer should be located in your scripts menu at the top ofyour image window. This tool may not be installed in your copy of TheGIMP, but can be acquired by either installing the newest version, orinstalling the script separately.The Fractal Explorer window allow you to render a fractal from a list. You can change the perspective, zoom, colors,and color depth to customize your fractal from the original defaults.

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By itself, it can be used to create some very impressive designs, but combined with other tools and filters, verycomplex patterns can be made.

Assemble ImagesTo assemble two (or more) images, simply create a new, transparent image of the required size, then open the imagesyou want to add as layers and arrange them as desired.

Result and example imagesIn this tutorial, we will create an image that look like this:

We use http:/ / commons. wikimedia. org/ wiki/ File:Dinosaur_comic_left. png and http:/ / commons. wikimedia.org/ wiki/ File:Dinosaur_comic_right. png as sources for the image, so the tutorial will assume that they can beopened by GIMP.

Creating the canvas

The New Image dialog

This is how your GIMP image window should look like now

First, we create an empty image where we can arrangethe other images as needed. For this purpose we use theFile > New... menu entry. Since the original images areboth 124×139 pixels big, we make the new image248×139 pixels large. Since we don't want to assumeanything about the images' colors, we choose to fill thenew image with transparency only.

Your image window should now look more or less asdisplayed on the right.

Importing the images

To import the images, simply open them as layers (File> Open as Layers...). You should now have the openedimages as layers somewhere on the main canvas,possibly hiding under each other. In any case, thelayers dialog should show them all.

Of course you could also add image data withCopy&Paste. First copy whatever you want and thenpaste it with Edit > Paste As > New Layer.

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File > Openas Layers...

Only one dinosaur head is visible, the otherone is hidden below.

All theneeded

images areshown inthe layers

dialog.

Arrange layersNow the only thing left to do is to arrange the layers as needed. For this we use the move tool to move them arounduntil they fit nicely. The result should look more or less as the image below:

Finished! Now you just need to save the image.

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Body ShiftingThis is more or less how magazines are manipulating their images so that the models look "perfect" in their eyes andother areas. A nice example of this in Adobe Photoshop is available at [2]. I strongly recommend using the latestversion of The GIMP.Load an image that you want to manipulate. Go in <Image> Filters > Distorts > IWarp (for Adobe Photoshop andPhotoshop Elements users, this is the equivalent of the "Liquify" filter).You manipulate the image in the preview. In the "Deform Mode" section, choose "Move", this will deform the imagein the direction of the movement of the mouse. For the purpose of body shifting, "Remove", "Grow" and "Shrink"are the other interesting buttons. They do what it says on the tin. Adjust "Deform radius" and "Deform amount" toyour likings, depending how subtle your edits have to be. Also the "Swirl" options produce interesting results. If youwant to start over (e.g. you messed your image up) click on "Reset".

Create a Brushed Metal EffectThis article will describe you how to create a brushed metal effect.

The Hurl filter can be found by going to Filters > Noise > Hurl.

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Step 1

Effect of first step.

First, we fill the canvas using the hurl filter (Filters >Noise > Hurl). Set Randomization (%) to 100.

This will do the same thing as the Scatter RGB filter(Filters > Noise > Scatter RGB) with all channels(Red, Green, and Blue) set to 1.0, However, ScatterRGB has slightly more options, and if you turn offIndependent RGB in the settings dialogue, may allowyou to skip the desaturation step.

Step 2

Then, apply a motion blur to the image (Filters > Blur> Motion Blur...) with an angle of 0 and a length ofabout 50. Change the angle to 180 and repeat theeffect. Why? Notice how the right edge of the finalimage isn't nice and brushed looking? Doing it in bothdirections will smooth this out. You may have toadjust the length setting so as not to "overblur".

The Motion Blur filter can be found by going to Filters > Blur >Motion Blur.

Alternatively, you can use the Gaussian Blur filter(Filters > Blur > Gaussian Blur). Just click the chainicon and turn the vertical value down and adjust thehorizontal value until you are satisfied. This effectwill not leave a side of the image left unblurred andmay have an even more satisfying final result withproper adjustment.

Step 3

This is the shortest step. Now we only need todesaturate the image. Go to Colours > Desaturate andpress Lightness, although Luminosity may sometimeslook better.

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Effect of second step.

Effect of third step.

Apply cropping / tiling / brightness / lighting filters tosuit. Cropping may not be necessary if you've used theGaussian Blur approach as opposed to the MotionBlur approach.

Create a BalloonStep IFirst, create a square image, and fill it with the colourof the balloon. Next, use the text tool to add anywriting. This should be centred, and take up no morethan about one-third of the space in each dimension.Merge the text layer with the colour layer.

Step IIUse "Map to Object" (<Image> Filters > Map > Map Object) to create a sphere. Ensure a transparent background isselected. By default, the sphere won't take up the whole of the image, so tweak this with the Orientation controls.

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Step IIITo get the shape of a balloon, use Curve Bend (<Image> Filters > Distorts > Curve Bend). Select to work on thelower curve, as a smooth. Add one control point in the lower half of the grid, centred horizontally.

Step IVThe resulting image won't fit the current size, so select <Image> Image > Fit Canvas to Layers.

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Create a Stone TextureThis tutorial describes the creation of stone textures.• 1: We start with Solid Noise (<Image> Filters > Render > Clouds > Solid Noise). Remember to tick the Tileable

check box.You can modify this a bit, but its effect may appear negative in the final result. You will see a rather smooth texture.

If you plan to make your image seamless, perhaps for usage in a 3D application, you might want to do a GaussianBlur (<Image> Filters > Blur > Gaussian Blur) at 100 to make the texture more neutral.

-->• 2: Now you have to add some stony grit on it. This can be done with Scatter RGB (<Image> Filters > Noise >

Scatter RGB) with Independent RGB off and the values very low (Recommended around 0.05 per channel)

• 3: Create a New Layer using the New Layer button on the layer window (If you don't have one, in The Gimp's main window, go to <Toolbox> File > Dialogs > Create New Doc > Layers, Channels, and Paths.) and

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do the Plasma filter (<Image> Filter > Render > Clouds > Plasma). Try to get a good balance of black andwhite. Don't forget to set the Mode in the layer window to "Value" (not "Normal").

Moving the turbulence up just a little can also help if your aiming to make the texture seamless.

• 4: Now you have to use Lighting Effects (<Image> Filters > Light Effects > Lighting Effects), go to the bumpmap tab and choose the layer with the rendered Plasma. Place the light source as desired. Let the plug-in do therest.

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If you need to make your texture seamless, you probably want to do a Bump map instead, which has the samelighting for all pixels.

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Add Speech Bubbles to a Comic StripThis tutorial will show you how to add text and speech bubbles to pre-made art in The GIMP v2.0 or later.

Getting started

Make a copyThis step isn't strictly necessary, but it's a good idea that could save you from repeating steps if something goeshorribly wrong. It's a very good idea if you're working on the only copy of your source image.(Better yet, don't work on the only copy of your source image.)

When you open an image in The GIMP, it automatically becomes the background layer. Anything added to theimage will be added as a higher layer, sitting above the background layer. You can combine layers by clickingLayers > Merge Down, and you'll probably want to at some stage, so you can work on multiple added items at thesame time.Right-click the Background layer and select Duplicate'. That way, if you accidentally merge the wrong layer downonto a lower one, or perform an operation that seems like a good idea but isn't (and can't be rolled back), you haven'toverwritten the only copy of the art you have.

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Add a filterYou'll most likely be adding text in black. If the background is dark as well, the text will be almost invisible anddifficult to work with. You can make it easier to view dark text on a dark background by adding a semi-opaque layerbetween them in a light colour. To do this:Click Layers > New Layer and select a transparent background.

To add the filter, select the Fill tool and select white as the colour to use. Reduce the opacity to 50% and clickanywhere on the new layer. You'll see the image turn milky, because you're now viewing the background imagethrough a semi-transparent white layer. Any text you lay down on top of this will be easy to see, and after you'veadded the speech bubbles around it, the filter can be removed, leaving the background looking like it did to beginwith.

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Text

Adding the textTo select the Text tool, press T. Select the colour, font and size you prefer. Use anti-alias should be ticked. Jaggededges on your text will make it harder to read, especially if the image is resized. Centre-aligned text is often best,too.

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PositioningAfter the text box is closed, the text tool automatically changes to the Move tool. At this point, if you try to move thetext, you'll see it slide out of the box and vanish completely off the edges of the layer. Since you probably do want tomove the text, to get it positioned just right, you'll want to expand the layer to the full size of the image. To do this:Click Layer > Layer to Image Size.

Now you can select your text with the Rectangular selection tool. As soon as the mouse is released, the selection toolchanges to the Move tool and you can simply drag your text to where it needs to be.

Combining stylesThe GIMP text tool applies a single style to an entire block of text, so an example of what you can't do is bold oritalicise individual words. (In other words, the previous sentence would be impossible.) To mix styles, add all thetext of one style in a single layer, taking care to leave the space for the other styled text, then add a second text layerwritten in the second style, positioning it over the first.

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Bubbles

BackgroundOnce you have all the necessary text on the screen and in the right position, you can create the bubbles. First, add anew layer, below the text layer. This part of the process will involve painting out a section of the current layer, so ifit's the same layer your text is on, you'll lose it.

Next, change to the Elliptical selection tool. Once again, make sure to anti-alias. Draw an oval around the text,making sure to leave enough white space so the text isn't crowded. This will become the bubble.

To add a stalk pointing to a character, change to the Path tool. (The GIMP's Path tool mirrors the Photoshop BézierCurve tool.) This allows you to mark out an area to be added to the selection you made with the Ellipse tool.

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First, click and release the mouse on a starting point just inside the oval. Next, click where you want the point of thestalk to be. If you want a straight line, release and continue to the next step. If you prefer a curve, hold the mousebutton down and drag the pointer away from the second point. The line will deform into a curve. It'll take a bit ofexperimentation to get it exactly where you want it, but it's a nice effect.

Click back into the oval to complete the other side of the stalk. Now you have an oval around the text, and on top ofthat, a stalk.Move back to the dialogues window again, and click the Paths tab. Right-click the uppermost path on the stack andselect Add to selection.

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Now the entire speech bubble including the stalk will have the blinking dashed line around it.

At this stage, you can experiment a little bit to add some variety among the different speech bubble shapes you have.For instance, the script-fu menu's selection options offers the distress selection tool, which will make the outline abit more random.Finally, select an appropriate background colour (white is the classic) and then the Fill tool again. (Make sure youraise the opacity back to 100% unless you prefer the speech bubble to be semi-transparent on top of your backgroundimage.) Click inside the selection and it will fill with the selected background colour out to the edges. Your textshould now be invisible behind the background colour. Don't try working with the text or any other task yet, becauseyou still need the speech bubble selected.

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BorderNow that you have the speech bubble filled, you can add a black (or any other colour) border to it. To do this, firstselect a foreground colour and then:Click Edit > Stroke selection....

The default line thickness is 6 pixels, which is probably too thick. 1px or 2px should be plenty. Click to confirm, anda border in the selected foreground colour will appear around the speech bubble.In order to create a smoother border, first click Select > To Path. Then, click Edit > Stroke Path.... Proceed as statedin the previous paragraph.

Cleaning up

Text in bubbleNow that you have speech bubbles, you want the text in them. To accomplish this, go back to the layers window.There's probably a whole range of layers by now, since each block of text and each speech bubble you created addedone (or more) new layer. Use the mouse to drag the speech bubble layers below the text layers and you'll see thewords appear in the bubbles.

Removing the filterUsing the mouse on the layers window, select the semi-opaque layer you created. Right-click and select Delete.You'll see the background image snap back to its original colours behind your speech bubbles.

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Saving your workIf you want to keep the different elements of the image on the separate layers, you'll need to save the image as a .xcffile, which is The GIMP's native file format. To save it in a format you can view in a browser or slideshow program,select the appropriate extension when you save the image and confirm that the file should be exported, (losing theseparation between layers in the process).

General practicesWe naturally start reading at the top left-hand corner of a box and proceed towards the bottom right. The first wordsspoken should be higher and further towards the left unless you have some other way in addition to speech bubblestalks of making it clear which character is speaking.Dark text on a light background is easiest to read. Text and background should never have the same brightness evenif they're different colours, since it makes it harder for the eye to distinguish between them. and in general the textshould have the 'richer' colour (e.g. red, blue, green) and the background should be a 'washed-out' colour (e.g. white,grey, pale blue).Start big. It's easy to scale large images down, small images scaled up will tend to be pixelated and won't look asgood.Don't crowd your images with too much talk. Text should give way to art rather than vice versa.

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Adding thought bubblesSo far a very effective way of adding speech to your work has been showcased. Now it's time to get thinking!

Tailoring the text to your preferencesA quick note on tool-usage that seems to pass people by:

You must open the Tool Option dialogue and use it as above to get the best out of GIMP. In this case the text editoris selected, but you also need it to use all GIMP tools effectively. It is important in the next section.

Creating the BubbleNow what you must do is select the tool options as in the screenshot above. This is essential if you want to followthe rest of this tutorial as you will be using it a lot to make sure everything is working correctly. In this instance theText tool is selected so you can work on all the options such as the font and text size as well as the text justification.This is essential.Now you need to type in your text as for the speech bubble tutorial. So far all is the same. Note: I have used the samesort of filter as in the earlier tutorial.

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Time to add the selections for the bubble. As before select the elliptical marquee tool.

However, this time you need to select the option in the screenshot above from the Tool Options dialogue. This willallow you to draw the several ellipses necessary to create a thought bubble without cancelling the selection each timeyou click away from it.After this just fill and stroke as for speech bubbles, move stuff around to your satisfaction, remember to delete thefilter and - one thought bubble!

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Blending ExposuresDigital Cameras are limited in their abilities to capture scenes with a large dynamic range. They are especially proneto blown out highlights, losing all detail in bright areas. This How to will demonstrate a method for capturingpictures and then processing them with the gimp to create a picture with more dynamic range that a normal picture.This will involve taking the picture and then combining them back into one picture using the gimp.

Auto Exposure BracketingWe will use Auto Exposure Bracketing to create 3 differently exposed pictures. The first picture will be a normalexposure, the second one will be an underexposure containing the highlights, and the third one will be anoverexposed picture containing the shadows.You will need a tripod or another stable surface. It is very important that the camera does not move a singlenanometre during the 3 exposures. Compose the frame in the viewfinder, then activate auto exposure bracketing.Then take the 3 pictures without moving the camera in between shots, preferable with a remote to avoid pressing theshutter button.

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The results should look like this:

Editing With The GimpOpen the middle exposure picture. From the File menu, select Open as Layers (default shortcut Ctrl+Alt+O) andshift-click to select both the dark and the bright exposure variants of the picture. This will add two layers, which youmight want to rename to "light" and "dark" for example.My images aren't perfectly aligned. Not sure why, maybe it has something to do with my tripod being on soft ground. Show only the underexposed and regular layer, and set the underexposed layer to partial transparency. Then zoom to 800% and move the underexposed layer until it is aligned with the regular exposure. Tap the arrow keys to move the layer one pixel at a time. You can try temporarily setting the mode of the dark layer to Divide or Difference; this will give strong contrast at unaligned edges (a high opacity will make the effect stronger). Repeat on the overexposed layer.

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Now duplicate the background layer.

Now use the threshold tool on the duplicated layer to make the overexposed areas pure white (<Image> Tools>Color Tools>Threshold...).

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Add a layer mask to the underexposed layer. Cut the threshold that you just created and paste it onto the layer mask.(The layer mask is the rectangle in the layer dialogue to the right of the layer thumbnail.) With only theunderexposed layer and regular layer, it should look like this:

The image looks rough at this point. To fix this select the layer mask and apply a Gaussian blur to it. I used a radius of 50px. The needed strength of the Gaussian blur will depend on the image so experiment with this value. This will

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ease the transition between the 2 images. It should now look like this:

Repeat with the overexposed image. The final image should look like this:

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Installing PluginsPlugins can be very helpful in The GIMP. GIMP Plugins can be quite useful. Take, for example, the DDS plugin.The DDS plugin is a now stable and reliable plugin to load DDS files, supporting the OpenGL S3TC extension. Ofcourse, GIMP plugins are not limited to file loading. There exists a GIMP plugin for using the CMYK color model!If you want to run Photoshop plugins in The GIMP, Microsoft Windows and Linux users may use the PSPI plugin.http:/ / www. gimp. org/ ~tml/ gimp/ win32/ pspi. html

Finding and downloading pluginsThe largest known source of GIMP plugins is the GIMP Plug-In Registry. The GIMP Plug-In Registry containsmany useful plugins for The GIMP and all of its versions. In addition to regular plugins, you can also find Perl,Script-Fu and Python plugins at the GIMP Plug-In Registry.You can find the GIMP Plug-In registry at the URL below.http:/ / registry. gimp. org/Once you have downloaded the plugin, you need to load it into GIMP. In order to load it into GIMP, it needs to beextracted from the package in which it came.

Extracting plugin packagesAlmost every plugin you download will come in a package. You need to extract this package.ZIP files can be extracted easily in Windows and GNU/Linux with the utilities included with your OS. Windowsincludes ZIP support by default. Most (if not all) GNU/Linux distributions include Info-ZIP [3], which can be used todecompress ZIP files, along with a GUI frontend, such as File Roller for GNOME and Ark for KDE.RAR files are compressed using a proprietary format. WinRAR [4] is the original tool for RAR, available for manyplatforms, but it is proprietary shareware. There are alternatives. The free software (as in freedom) unrar [5] canunpack RAR files that do not use RAR 3.0 or later. If RAR 3.0 is needed, taking a newer CVS snapshot may work,which has been done for the unrar-free Debian and Ubuntu packages. The 7-Zip [6] program includes support forRAR 3.0, but the RAR component is proprietary.TAR.GZ and TAR.BZ2 files are compressed archives originating from GNU/Linux. It is a double extension. The"GZ" or "BZ2" section refers to the fact the compression method is gzip or bzip2. gzip and bzip2 can only compresssingle files, however, so a program like tar is used to merge the files/folders into one file, hence the "TAR" section ofthe name. On GNU/Linux, the original tools can be used, usually "tar -xvzf file.tar.gz" (TAR.GZ) or "tar -xvjffile.tar.bz2" (TAR.BZ2). On Windows, the free 7-Zip can be used.7z files can be done in Windows with 7-Zip, and in GNU/Linux, if the p7zip utility is installed, Ark and File Rollerwill work, along with the p7zip command directly.If you find any other file types, a quick search on the internet will help. On the Windows platform, 7-Zip [6] is apiece of software that will extract most file formats, while on GNU/Linux, most free are bundled with the OS andothers usually can be found in your package manager.

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Copying the plugin to the GIMP plugin directoryOpen up the folder containing the plugin. Now, copy the files to the clipboard (Select the files, right click one andpress copy)

WindowsOn Windows, go to folder GIMP is installed in (usually somewhere in Program Files). Once in the GIMP's mainfolder navigate to lib\gimp\*version*\ where as *version* represents the version of The Gimp. Then double click the"plug-ins" folder. Not all plugins will run in Windows if the OS is 64bit, "normalmap" is one.To install a script (ends in ".scm") navigate to share\gimp\*version*\. Then double click the "scripts" folder.

GNU/LinuxOn GNU/Linux, you might need to read the manual at the official site first under the section:"1.3. Installing New Plugins" http:/ / docs. gimp. org/ en/ gimp-scripting. html#gimp-plugins-installPlugins may be stored in different locations depending upon your distribution.Locally installing plugins are easiest because they will usually be stored in a hidden folder under $HOME/.gimp-*.*(where you should replace $HOME with path to your home catalogue and gimp-*.* with the version you use (forexample 2.6). In this case, however, the plugins you install will only be available to the user who installed them,which may not be what you want.If you want to install plugins globally, you might have to look around a bit more. Some boxes will have pluginsstored at /opt/gnome/lib/gimp/2.0/plug-ins/ (change lib to lib64 if you've got a 64bit OS), others/usr/lib/gimp/2.0/plug-ins/ (change lib to lib64 if you've got a 64bit OS. Running "$whereis gimp" (or "which gimp")in a terminal might help. For example, if the output was /some/place/bin/gimp, then you could check the/some/place/lib (or lib64 if you've got a 64bit OS). In Ubuntu, plugins are located at /usr/share/gimp/2.0/ for both 32and 64bit. Note that you have to be root to access these files.

Ubuntu LinuxSteps to install GIMP scripts / plugins1.1. Download the relevant GIMP script from the GIMP plug-in registry.

• Each GIMP script is available in two formats namely – Script-Fu (.scm) and Python script (.py). You canchoose to download either one of them but not both. If you are downloading the Script Fu file, then it shouldbe saved in GIMP scripts folder. If you are downloading the Python file, it should be saved in the GIMPplug-ins folder. Let’s assume we have downloaded the python script for the sake of this example.

2.2. Save the downloaded python script into the GIMP plug-ins folder. In Ubuntu, it is in the directory/usr/lib/gimp/2.0/plug-ins/ How did I find the correct directory, you ask? I opened a terminal and ran thefollowing command :

$ dpkg -L gimp | grep plug-ins

Of course, there is another way of finding the GIMP plug-ins folder which is, start GIMP and open “GIMPPreferences” dialog. In this dialog, click on “Folders > Plug-ins” and you will find the directory where GIMPinstalls all its plug-ins.

Now you copy the downloaded script (gimp-script.py) into this folder as follows :

$ sudo cp gimp-script.py /usr/lib/gimp/2.0/plug-ins/.

3.3. Next open the terminal and set the execute bit for the python script file as follows :

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$ sudo chmod +x /usr/lib/gimp/2.0/plug-ins/gimp-script.py

4.4. Lastly, if you have GIMP already running, restart it so that it is aware of all the new scripts you have installed.

Testing the pluginTo test the plugin, simply open the GIMP and try the plugin. If this plugin makes a certain image type supported, tryopening a file of that type. If the plugin is a filter, test it.

TroubleshootingIf the plugin appears to not be working, be sure that its for your OS and it is for your version of GIMP.Also, Scheme ( Script-Fu ) plugins (*.scm) and python plugins go in their own respective folder, up one level fromthe regular plugins directory. Python plugins also require gimp-python.The Script-Fu directory is something like /usr/share/gimp/2.0/scripts/.

Remove Coherent NoiseInterference or other regular patterns overlaid on an image can be introduced by a variety of sources, including:•• Electromagnetic interference in the environment of the device collecting the image;•• Noise in a transmitted image such as a television still due to analogue transmission interference or degradation of

media;•• The texture of the paper that the image was printed on, particularly if it was printed in a cheap magazine or

newspaper.Attempting to remove these by ordinary image space techniques such as replicating the pattern and subtracting itwould be extremely difficult and unlikely to be completely successful. Sometimes interference can be hidden bydownscaling or blurring, but this is rarely a satisfactory solution. Sometimes convolutions can be used, but this is anadvanced technique.Since regular patterns have a very small bandwidth in the image's spectrum, a simple and effective technique fordealing with these problems is to identify the interfering features in the power spectrum image produced by Fourieranalysis, eliminate them, and convert back to image space.In order to fully understand what you are doing here, you should know the basic principles of Fourier analysis;anyway, following this step-by-step how-to will let you removing any unwanted regular pattern over the picture youwant.

Installing all the necessaryThis guide is Linux-oriented, mainly on Ubuntu Linux. Since Gimp is multi-platform, this section could begeneralized to any OS. Please do it if you know how to do it

First we have to install all the necessary software. All you need is available for free on Internet.On Linux, you have to download and install:• Gimp (obviously!) www.gimp.org [7]

• The gimptool utility: it should be within Gimp. Several Linux distributions put it in a different package. OnDebian and Ubuntu it is called libgimp2.0-dev

• fftw, a library to calculate the Fast Fourier Transform of any signal. You can get it from www.fftw.org [8]. It isavailable on Ubuntu and Debian repositories as fftw3 and fftw3-dev

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• the Fourier Gimp plug-in, you can get it from http:/ / people. via. ecp. fr/ ~remi/ soft/ gimp/ gimp_plugin_en.php3 [9]. There is no package for Debian/Ubuntu, you have to install it from the source.

On Windows, to install the Fourier Gimp plug-in download the "Binaries for Windows" from http:/ / people. via.ecp. fr/ ~remi/ soft/ gimp/ gimp_plugin_en. php3#fourier and extract its contents into the Gimp plug-ins directory(.gimp-2.x\plug-ins in your user directory or C:\Program Files\GIMP-2.x\lib\gimp\2.0\plug-ins).

An example of coherent noise

An image with coherent noise

On the right, you see the picture of a flowerwith a coherent noise pattern on it. It couldbe possible to get a picture like this using ascanner to get the image printed on a lucidpaper, for example. It is evident that thedisturbance we want to remove is all overthe picture, so it would be very difficult toremove with traditional means, such asblurring, sharpening or cloning. It is regularpattern; that is why it will quite easy toremove in the frequency domain.Unfortunately, removing the coherent noisewill cause the removal of some informationthat is contained in the same frequencies asthe pattern. It is very difficult to preservethat information, and it will not beconsidered in this tutorial: losing someinformation will be the cost of removing thenoise.

Edit the image

Open the image

First open the image with Gimp. If it'scoloured, it will be in RGB format andyou'll have to manipulate the RGBlayers separately. In order to do so,right-click on the image and choose"Image > Mode > Decompose" (seescreen-shot on left). Gimp will createanother gray-scale image having theRGB as different layers

(With GIMP 2.6.4 "Decompose" canbe found at: "Colors > Components >Decompose...".)

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Choose RGB

Choose RGB and press OK (see screenshot on right). This way you will getthe decomposed picture.

Let's move to the frequency domain

Select the window with the newpicture, go to the layers window (ifyou can't see it, go to "File > Dialogs> Layers" and it will appear) and hideall but one layer, by clicking on theeyes. Then select the remaining layer.In the screen-shot on the left, I haveisolated the blue layer. Now you canwork on one layer without influencingthe others. Let us convert it to itsspectrum using the FFT plug-in:right-click on the picture and go to"Filters > Generic > FFT Forward"(see again the screen-shot on left).Now you can manipulate the spectrum

of the blue layer of the picture. Note: strictly speaking, the Fourier transform of a signal is made of amplitude andphase; Gimp will show you only the amplitude, and that is the only thing you can edit, but it is enough for ourpurpose.

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Spectrum of the red layer with blinking arrows pointing to the area to be deleted

Looking at the spectrum you should be ableto see bright small spots. Those representthe spectrum of the noise you want toremove. Since it was very regular, its powerwill be very concentrated in the frequencydomain. In the picture on the right, you cansee the spectrum of the red layer, with twoblinking arrows pointing where those spotsare. The red layer was chosen just becausethe spots were more evident (that alsomeans that most of the noise was containedin the red layer). All you have to do now isto delete them. If you were thinking aboutusing the Erase tool, that's not such a goodidea, because deleting the informationcompletely will cause a sharp change in thespectrum, thus introducing even morecoherent noise. You have to delete themsmoothly. One way is to use the Blur tool -since it has an "averaging" effect; if you useit on the bright spots, you will actually decrease its magnitude without deleting them completely. Another possibilityis to use the paintbrush tool with a mid-grey colour (808080 in hexadecimal notation). You can not know exactlywhere the noise ends and where the information you want to keep starts. You might have to experiment a bit to get agood result.

and now let's come back to the spatial domain

After you have finished deleting thespots, you have to convert it back tothe image space domain by performingthe inverse FFT. Right-click on thepicture and choose "Filters > Generic> FFT Inverse" as shown in the pictureon the left. Do the same for all thethree layers.

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Let's come back to the RGB picture

After you have edited all the layers(remember to perform the inverse FFTon all of them!), you must mix them toget your RGB picture back. Right-clickon the picture and choose "Image >Mode > Compose" (see screen-shot onright). Here is your picture!

Final cleaned version

On the left you can see the result of ourwork. You can still see some noise, but thepicture is much better than the original!

Removal of UnwantedElements in the ImageOften there is a need to remove unwantedelements in a image, such as thebackground. There are multiple methods.

Method 1: Magic Wand

An easy method is to use the Magic Wandselection tool.

1.1. Firstly, right click on the layer you areworking on and add a alpha channel ifthere is not already one.

2. Now switch to the Magic Wand tool.Make sure the mode is set to Add to the

current selection.3.3. Select all the parts that you want to erase by simply clicking in the area.4.4. Press Delete.

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Method 2: Colour to AlphaAn alternative method is Colour to Alpha. This method works better with logos with less than 5 colours.1.1. Firstly, right click on the layer you are working on and add an alpha channel if required.2. Select <Image> Colours > Colour to Alpha.3.3. Set the colour after the "From:" label to the colour that you would like to remove.4.4. Click OK.5.5. Repeat steps 1-4 for any other colours that you need to remove.

Method 3: Foreground SelectA new method is the Foreground Select tool. This is best when there is only one thing in the foreground which youwant to keep.1. Firstly, select the Foreground Select tool.2.2. Mark out a rough area around the foreground.3.3. Scribble in the foreground only. Repeat scribbling until the coloured boundary is tightly around the foreground.4.4. Press ENTER.5. Go to <Image> Select > Invert.6.6. Press Delete.

Caption a PictureThis effect will create a text caption with an outline effect. Firstly, use the text tool to write your caption. Acontrasting caption would typically be black text with a white border; the border will be coloured later, so use blacktext.On the text layer, use• <Image> Layer > Discard Text Information• <Image> Layer > Layer to Image Size• <Image> Layer > Mask > Add Layer Mask

Choose "Transfer layer's alpha channel" as initial mask

The layer dialogue box, showing the two layers,

Duplicate the text layer ( in Layers dialogue or <Image> Layer >Duplicate Layer)

Select the lower layer's content, and fill it in white.Switch to the layer's mask, and use <Image> Filters > Generic >Erode, this should expand the lower layer and give the text a border.This may need to be repeated several times ( Ctrl+F )

Different fills and gradients can be applied to the two layers for a rangeof effects. Additionally, if a layer's mask is copied into a new, hiddenlayer, this can be used to apply a bump map via <Image> Filters >Map > Bump Map.

A method that may be easier to follow is documented here [10] withstep-by-step photos.

Add a Shine to Buttons

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What the Effect Looks LikeThe effect will produce something like this:

Design the Button

For this button I selected all, then did Image>Select>Rounded Rectangle, with a radius of 50. I filled it with red, thenI selected the border and filled with a darker red.

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Add a New Layer for the ShineCreate a new layer (call it shine or something similar), then select the whole region of your button (If you created iton a new layer you can right click on the layer and select “Alpha to Selection”), next shrink the selection(Image>Select>Shrink), how much you want to shrink it depends on the size of the image, for mine I used 6px, thenfill the selection with white.

Now, you have a big ugly white spot in your image, how will that be turned into a shine? First, turn the layertransparency down to about 80%, this is found in the layers dialogue

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Turn the Ugly Spot into a ShineFirst, add a layer mask, and select fill with black. (Full transparency).

Then go to the gradient tool and select linear white to black gradient, (make sure you are editing the layer mask-- itshould have a white border around it in the layers dialogue), draw a gradient from wherever you want the shine tostart (Top-left corner in the example) to about the middle, feel free to experiment.

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Add Text/Drawings to Your ButtonOnce you are done you may add another layer for drawing on, or put text on, for the example I added the text“Button Text”.

External TutorialsMany other people have written high quality tutorials. This page will collect links to some of those.Tutorial sites:• http:/ / www. gimptalk. com/• http:/ / www. gimpusers. com/• http:/ / web. archive. org/ web/ 20080206133322/ http:/ / gug. sunsite. dk/• http:/ / blog. patdavid. net/ p/ getting-around-in-gimp. htmlSingle tutorials:• Adding film grain to images [11]

• Colorizing black and white sketches [12]

• Creating Simple animations [13]

• Creating icons [14]

• Creating a detailed sketch out of a photo [15]

• Creating minimalistic sketch out of a photo [16]

• Smart sharpening of images with edge sharpening [17] - Sharpens images without the noise• Blending exposures [18] - Allows for the best parts of two similar images to be integrated• Recovering highlights [19] - Fixes photos that are washed out in certain areas• Adding a dreamy feel to a photo [20]

• Sepia toning [21] - Like black and white, but with a different tone and feel• Contrast masks [22] - Can enhance the feel of photos and give them a nice tone• Camera noise removal [23] - Removes noise from digital photos• Selective colorization [24] - Colorize parts of an image, leave the rest black and white• Converting images from color to black and white [25] - Detailed tutorial• Batch image processing [26] - Automatically process a bunch of images in the same way

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• Creating a stone texture [27]

• Create iText [28] - Create shiny, Mac-like text• Create chrome text [29]

• Create fractal backgrounds [30]

• Create the Web 2.0 wet-floor-effect [31]

• Creating a "Neutral density filter" [32] - (Fix dark lighting)• Change the focus [33] - Blur the background to accentuate objects the foreground• Make photos look as if they were vignetted [34] - Simulates having used a wide angle lens or lens hoods• Creating a website layout with GIMP [35]

• Creating lightening particle-like effects [36]

References[1] http:/ / www. gimp. org/[2] http:/ / www. youtube. com/ watch?v=-5Qv6ykFhYc[3] http:/ / www. info-zip. org/[4] http:/ / www. rarlab. com/[5] http:/ / home. gna. org/ unrar/[6] http:/ / www. 7-zip. org/[7] http:/ / www. gimp. org[8] http:/ / www. fftw. org[9] http:/ / people. via. ecp. fr/ ~remi/ soft/ gimp/ gimp_plugin_en. php3[10] http:/ / gimp-gate. dreamwidth. org/ 6562. html[11] http:/ / mmmaybe. gimp. org/ tutorials/ Film_Grain/[12] http:/ / mmmaybe. gimp. org/ tutorials/ Coloring_A_BW_Sketch/[13] http:/ / mmmaybe. gimp. org/ tutorials/ Simple_Animations/[14] http:/ / mmmaybe. gimp. org/ tutorials/ Creating_Icons/[15] http:/ / mmmaybe. gimp. org/ tutorials/ Photo_To_Sketch/[16] http:/ / mmmaybe. gimp. org/ tutorials/ Sketch_Effect/[17] http:/ / mmmaybe. gimp. org/ tutorials/ Smart_Sharpening/[18] http:/ / mmmaybe. gimp. org/ tutorials/ Blending_Exposures/[19] http:/ / mmmaybe. gimp. org/ tutorials/ Blown_Out_Highlights/[20] http:/ / mmmaybe. gimp. org/ tutorials/ Blur_Overlays/[21] http:/ / mmmaybe. gimp. org/ tutorials/ Sepia_Toning/[22] http:/ / mmmaybe. gimp. org/ tutorials/ ContrastMask/[23] http:/ / mmmaybe. gimp. org/ tutorials/ Selective_Gaussian_Blur/[24] http:/ / mmmaybe. gimp. org/ tutorials/ Selective_Color/[25] http:/ / mmmaybe. gimp. org/ tutorials/ Color2BW/[26] http:/ / mmmaybe. gimp. org/ tutorials/ Basic_Batch/[27] http:/ / web. archive. org/ web/ 20071219124253/ http:/ / gug. sunsite. dk/ tutorials/ waldgeist1/[28] http:/ / web. archive. org/ web/ 20080214230546/ http:/ / gug. sunsite. dk/ tutorials/ tomcat1/[29] http:/ / web. archive. org/ web/ 20080119015033/ http:/ / gug. sunsite. dk/ tutorials/ tomcat16/[30] http:/ / gentoo-wiki. com/ TIP_GIMP_Fractal_Backgrounds[31] http:/ / wickedowl. blogspot. com/ 2006/ 07/ creating-apples-shiny-table-effect. html[32] http:/ / gimpguru. org/ Tutorials/ NDFilter/[33] http:/ / gimpguru. org/ Tutorials/ SimulatedDOF/[34] http:/ / gimpguru. org/ Tutorials/ Vignetting/[35] http:/ / www. gimptalk. com/ forum/ topic/ Creating-Complete-Website-With-Gimp-14092-1. html[36] http:/ / www. gimptalk. com/ forum/ topic/ Creating-Lightning-Plus-A-Couple-Of-Added-Twists-122-1. html

Article Sources and Contributors 75

Article Sources and ContributorsGIMP/Print version  Source: http://en.wikibooks.org/w/index.php?oldid=2151770  Contributors: Adrignola, Dan Polansky, QuiteUnusual, Soeb

Image Sources, Licenses and ContributorsFile:The_GIMP_icon_-_gnome.svg  Source: http://en.wikibooks.org/w/index.php?title=File:The_GIMP_icon_-_gnome.svg  License: GNU General Public License  Contributors: The GIMP'sart/developer teamFile:GIMP-Toolbox-Tools-Default.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-Tools-Default.png  License: unknown  Contributors: Original uploader wasSoeb at en.wikibooksFile:GIMP-Toolbox-SelectionRectangle-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-SelectionRectangle-Icon.png  License: unknown  Contributors:Original uploader was Soeb at en.wikibooksFile:GIMP-Toolbox-SelectionEllipse-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-SelectionEllipse-Icon.png  License: unknown  Contributors: Originaluploader was Soeb at en.wikibooksFile:GIMP-Toolbox-SelectionLasso-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-SelectionLasso-Icon.png  License: unknown  Contributors: Originaluploader was Soeb at en.wikibooksFile:GIMP-Toolbox-SelectionWand-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-SelectionWand-Icon.png  License: unknown  Contributors: Originaluploader was Soeb at en.wikibooksFile:GIMP-Toolbox-SelectionByColor-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-SelectionByColor-Icon.png  License: unknown  Contributors: Originaluploader was Soeb at en.wikibooksFile:GIMP-Toolbox-SelectionScissors-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-SelectionScissors-Icon.png  License: unknown  Contributors: Originaluploader was Soeb at en.wikibooksFile:GIMP-Toolbox-SelectionForeground-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-SelectionForeground-Icon.png  License: unknown  Contributors:Original uploader was Soeb at en.wikibooksFile:GIMP-Toolbox-BrushBucketFill-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-BrushBucketFill-Icon.png  License: unknown  Contributors: Originaluploader was Soeb at en.wikibooksFile:GIMP-Toolbox-BrushBlend-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-BrushBlend-Icon.png  License: unknown  Contributors: Original uploaderwas Soeb at en.wikibooksFile:GIMP-Toolbox-BrushPencil-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-BrushPencil-Icon.png  License: unknown  Contributors: Original uploaderwas Soeb at en.wikibooksFile:GIMP-Toolbox-BrushPaintbrush-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-BrushPaintbrush-Icon.png  License: unknown  Contributors: Originaluploader was Soeb at en.wikibooksFile:GIMP-Toolbox-BrushEraser-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-BrushEraser-Icon.png  License: unknown  Contributors: Original uploaderwas Soeb at en.wikibooksFile:GIMP-Toolbox-BrushAirbrush-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-BrushAirbrush-Icon.png  License: unknown  Contributors: Originaluploader was Soeb at en.wikibooksFile:GIMP-Toolbox-BrushInk-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-BrushInk-Icon.png  License: unknown  Contributors: Original uploader wasSoeb at en.wikibooksFile:GIMP-Toolbox-BrushClone-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-BrushClone-Icon.png  License: unknown  Contributors: Original uploaderwas Soeb at en.wikibooksFile:GIMP-Toolbox-BrushHeal-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-BrushHeal-Icon.png  License: unknown  Contributors: Original uploader wasSoeb at en.wikibooksFile:GIMP-Toolbox-BrushPerspectiveClone-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-BrushPerspectiveClone-Icon.png  License: unknown Contributors: Original uploader was Soeb at en.wikibooksFile:GIMP-Toolbox-BrushConvolve-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-BrushConvolve-Icon.png  License: unknown  Contributors: Originaluploader was Soeb at en.wikibooksFile:GIMP-Toolbox-BrushSmudge-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-BrushSmudge-Icon.png  License: unknown  Contributors: Originaluploader was Soeb at en.wikibooksFile:GIMP-Toolbox-BrushDodgeBurn-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-BrushDodgeBurn-Icon.png  License: unknown  Contributors: Originaluploader was Soeb at en.wikibooksFile:GIMP-Toolbox-TransformMove-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-TransformMove-Icon.png  License: unknown  Contributors: Originaluploader was Soeb at en.wikibooksFile:GIMP-Toolbox-TransformAlign-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-TransformAlign-Icon.png  License: unknown  Contributors: Originaluploader was Soeb at en.wikibooksFile:GIMP-Toolbox-TransformCrop-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-TransformCrop-Icon.png  License: unknown  Contributors: Originaluploader was Soeb at en.wikibooksFile:GIMP-Toolbox-TransformRotate-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-TransformRotate-Icon.png  License: unknown  Contributors: Originaluploader was Soeb at en.wikibooksFile:GIMP-Toolbox-TransformScale-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-TransformScale-Icon.png  License: unknown  Contributors: Originaluploader was Soeb at en.wikibooksFile:GIMP-Toolbox-TransformShear-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-TransformShear-Icon.png  License: unknown  Contributors: Originaluploader was Soeb at en.wikibooksFile:GIMP-Toolbox-TransformPerspective-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-TransformPerspective-Icon.png  License: unknown  Contributors:Original uploader was Soeb at en.wikibooksFile:GIMP-Toolbox-TransformFlip-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-TransformFlip-Icon.png  License: unknown  Contributors: Originaluploader was Soeb at en.wikibooksFile:GIMP-Toolbox-PathTool-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-PathTool-Icon.png  License: unknown  Contributors: Original uploader wasSoeb at en.wikibooksFile:GIMP-Toolbox-ColourPickerTool-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-ColourPickerTool-Icon.png  License: unknown  Contributors:Original uploader was Soeb at en.wikibooksFile:GIMP-Toolbox-MagnifyTool-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-MagnifyTool-Icon.png  License: unknown  Contributors: Original uploaderwas Soeb at en.wikibooksFile:GIMP-Toolbox-MeasureTool-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-MeasureTool-Icon.png  License: unknown  Contributors: Original uploaderwas Soeb at en.wikibooks

Image Sources, Licenses and Contributors 76

File:GIMP-Toolbox-TextTool-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-TextTool-Icon.png  License: unknown  Contributors: Original uploader wasSoeb at en.wikibooksFile:GIMP-Toolbox-ColourColourBalance-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-ColourColourBalance-Icon.png  License: unknown  Contributors:Original uploader was Soeb at en.wikibooksFile:GIMP-Toolbox-ColourHueSaturation-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-ColourHueSaturation-Icon.png  License: unknown  Contributors:Original uploader was Soeb at en.wikibooksFile:GIMP-Toolbox-ColourColourize-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-ColourColourize-Icon.png  License: unknown  Contributors: Originaluploader was Soeb at en.wikibooksFile:GIMP-Toolbox-ColourBrightnessContrast-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-ColourBrightnessContrast-Icon.png  License: unknown Contributors: Original uploader was Soeb at en.wikibooksFile:GIMP-Toolbox-ColourThreshold-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-ColourThreshold-Icon.png  License: unknown  Contributors: Originaluploader was Soeb at en.wikibooksFile:GIMP-Toolbox-ColourLevels-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-ColourLevels-Icon.png  License: unknown  Contributors: Originaluploader was Soeb at en.wikibooksFile:GIMP-Toolbox-ColourCurves-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-ColourCurves-Icon.png  License: unknown  Contributors: Originaluploader was Soeb at en.wikibooksFile:GIMP-Toolbox-ColourPosterize-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-ColourPosterize-Icon.png  License: unknown  Contributors: Originaluploader was Soeb at en.wikibooksFile:GIMP-Toolbox-ColourDesaturate-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-ColourDesaturate-Icon.png  License: unknown  Contributors: Originaluploader was Soeb at en.wikibooksFile:GIMP-Toolbox-GEGLOperationTool-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-GEGLOperationTool-Icon.png  License: unknown  Contributors:Original uploader was Soeb at en.wikibooksFile:GIMP-Toolbox-ToolOptions-All.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-ToolOptions-All.png  License: unknown  Contributors: Original uploader wasSoeb at en.wikibooksFile:GIMP-Toolbox-ToolOptions-SaveOptions-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-ToolOptions-SaveOptions-Icon.png  License: unknown Contributors: Original uploader was Soeb at en.wikibooksFile:GIMP-Toolbox-ToolOptions-RestoreOptions-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-ToolOptions-RestoreOptions-Icon.png  License: unknown Contributors: Original uploader was Soeb at en.wikibooksFile:GIMP-Toolbox-ToolOptions-DeleteOptions-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-ToolOptions-DeleteOptions-Icon.png  License: unknown Contributors: Original uploader was Soeb at en.wikibooksFile:GIMP-Toolbox-ToolOptions-ResetOptions-Icon.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-ToolOptions-ResetOptions-Icon.png  License: unknown Contributors: Original uploader was Soeb at en.wikibooksFile:GIMP-Toolbox-Colour-Indicator-ActiveImage-Area.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-Colour-Indicator-ActiveImage-Area.png  License:unknown  Contributors: Original uploader was Soeb at en.wikibooksFile:GIMP-Toolbox-BrushBlend-Menu.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-BrushBlend-Menu.png  License: unknown  Contributors: Original uploaderwas Soeb at en.wikibooksFile:GIMP-Toolbox-BrushBlend-Flip.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-BrushBlend-Flip.png  License: unknown  Contributors: GIMP DevelopmentTeamImage:GIMP-Toolbox-BrushBlend-RepeatTriangular.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-BrushBlend-RepeatTriangular.png  License: Public Domain Contributors: Me, Stanislaw Gackowski (Soeb)File:GIMP-Toolbox-TransformMove-Menu.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-TransformMove-Menu.png  License: unknown  Contributors: Originaluploader was Soeb at en.wikibooksFile:GIMP-Toolbox-TransformCrop-Menu.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-TransformCrop-Menu.png  License: unknown  Contributors: Originaluploader was Soeb at en.wikibooksFile:GIMP-Toolbox-SelectionAll-Icons.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-SelectionAll-Icons.png  License: unknown  Contributors: GIMPDevelopment TeamFile:GIMP-Toolbox-SelectionAll-Menu.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-SelectionAll-Menu.png  License: unknown  Contributors: GIMPDevelopment TeamFile:GIMP-Toolbox-SelectionAll-ModeReplace.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-SelectionAll-ModeReplace.png  License: unknown  Contributors:GIMP Development TeamFile:GIMP-Toolbox-SelectionAll-ModeAdd.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-SelectionAll-ModeAdd.png  License: unknown  Contributors: GIMPDevelopment TeamFile:GIMP-Toolbox-SelectionAll-ModeSubtract.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-SelectionAll-ModeSubtract.png  License: unknown  Contributors:GIMP Development TeamFile:GIMP-Toolbox-SelectionAll-ModeIntersect.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-SelectionAll-ModeIntersect.png  License: unknown  Contributors:GIMP Development TeamFile:GIMP-Toolbox-SelectionRectangle-Menu.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-SelectionRectangle-Menu.png  License: unknown  Contributors:Original uploader was Soeb at en.wikibooksFile:GIMP-Toolbox-SelectionEllipse-Menu.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-SelectionEllipse-Menu.png  License: unknown  Contributors: GIMPDevelopment TeamFile:GIMP-Toolbox-SelectionLasso-Menu.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-SelectionLasso-Menu.png  License: unknown  Contributors: Originaluploader was Soeb at en.wikibooksFile:GIMP-Toolbox-SelectionWand-Menu.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-SelectionWand-Menu.png  License: unknown  Contributors: Originaluploader was Soeb at en.wikibooksFile:GIMP-Toolbox-SelectionByColor-Menu.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-SelectionByColor-Menu.png  License: GNU General Public License Contributors: GIMP development teamFile:GIMP-Toolbox-SelectionScissors-Menu.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-SelectionScissors-Menu.png  License: GNU General Public License Contributors: GIMP development teamFile:GIMP-Toolbox-SelectionForeground-Menu.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-SelectionForeground-Menu.png  License: GNU General PublicLicense  Contributors: GIMP development teamFile:GIMP-Toolbox-ColourPickerTool-Menu.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-ColourPickerTool-Menu.png  License: unknown  Contributors:Original uploader was Soeb at en.wikibooksFile:GIMP-Toolbox-ColourPickerTool-InfoWindow.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-ColourPickerTool-InfoWindow.png  License: unknown Contributors: Original uploader was Soeb at en.wikibooksFile:GIMP-Toolbox-MagnifyTool-Menu.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP-Toolbox-MagnifyTool-Menu.png  License: unknown  Contributors: Originaluploader was Soeb at en.wikibooksFile:TheGIMP-Toolbox-MeasureTool-Menu.png  Source: http://en.wikibooks.org/w/index.php?title=File:TheGIMP-Toolbox-MeasureTool-Menu.png  License: unknown  Contributors:Original uploader was Soeb at en.wikibooks

Image Sources, Licenses and Contributors 77

File:TheGIMP-TextTool-Menu.png  Source: http://en.wikibooks.org/w/index.php?title=File:TheGIMP-TextTool-Menu.png  License: unknown  Contributors: Original uploader was Soeb aten.wikibooksFile:TheGIMP-TextTool-Editor.png  Source: http://en.wikibooks.org/w/index.php?title=File:TheGIMP-TextTool-Editor.png  License: unknown  Contributors: Original uploader was Soeb aten.wikibooksFile:GIMP_info.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP_info.png  License: unknown  Contributors: Original uploader was PurplePieman at en.wikibooksFile:Gimp-decompose.png  Source: http://en.wikibooks.org/w/index.php?title=File:Gimp-decompose.png  License: unknown  Contributors: Original uploader was Reub2000 at en.wikibooks.Later version(s) were uploaded by Soeb at en.wikibooks.File:The_Gimp-Levels_window.png  Source: http://en.wikibooks.org/w/index.php?title=File:The_Gimp-Levels_window.png  License: unknown  Contributors: Original uploader was Soeb aten.wikibooksFile:The_Gimp-Curves.png  Source: http://en.wikibooks.org/w/index.php?title=File:The_Gimp-Curves.png  License: unknown  Contributors: Original uploader was Soeb at en.wikibooksImage:Gaussian.png  Source: http://en.wikibooks.org/w/index.php?title=File:Gaussian.png  License: unknown  Contributors: Original uploader was Dr. Baron von Fluffles, Ph.D. aten.wikibooksImage:gaussianwindow.png  Source: http://en.wikibooks.org/w/index.php?title=File:Gaussianwindow.png  License: unknown  Contributors: Original uploader was Dr. Baron von Fluffles, Ph.D.at en.wikibooks. Later version(s) were uploaded by Soeb at en.wikibooks.Image:The_GIMP-pixelize_example.png  Source: http://en.wikibooks.org/w/index.php?title=File:The_GIMP-pixelize_example.png  License: Public Domain  Contributors: Original uploaderwas Soeb at en.wikibooksImage:The_GIMP-filter_pixelize_window.png  Source: http://en.wikibooks.org/w/index.php?title=File:The_GIMP-filter_pixelize_window.png  License: unknown  Contributors: Originaluploader was Soeb at en.wikibooksFile:The GIMP-usm before.png  Source: http://en.wikibooks.org/w/index.php?title=File:The_GIMP-usm_before.png  License: GNU General Public License  Contributors: Funfood, Reub2000,Tony Wills, XhienneFile:The GIMP-usm exaggerated.png  Source: http://en.wikibooks.org/w/index.php?title=File:The_GIMP-usm_exaggerated.png  License: GNU General Public License  Contributors: Funfood,Reub2000, Tony Wills, XhienneFile:GIMP_two_dinosaurs.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP_two_dinosaurs.png  License: GNU Free Documentation License  Contributors: rubik-wuerfelImage:GIMP_new_image_248_139_2.6.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP_new_image_248_139_2.6.png  License: unknown  Contributors: Original uploaderwas Rubik-wuerfel at en.wikibooksImage:GIMP_empty_image_248_139_2.6.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP_empty_image_248_139_2.6.png  License: unknown  Contributors: rubik-wuerfel.Original uploader was Rubik-wuerfel at en.wikibooksFile:GIMP open as layers menu 2.6.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP_open_as_layers_menu_2.6.png  License: unknown  Contributors: Original uploader wasRubik-wuerfel at en.wikibooksFile:GIMP image window dinosaur 2.6.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP_image_window_dinosaur_2.6.png  License: unknown  Contributors: Luuva andrubik-wuerfel. Original uploader was Rubik-wuerfel at en.wikibooksFile:GIMP layers dialog two dinosaurs 2.6.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP_layers_dialog_two_dinosaurs_2.6.png  License: unknown  Contributors: Luuvaand rubik-wuerfel. Original uploader was Rubik-wuerfel at en.wikibooksFile:GIMP two dinosaurs windows 2.6.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP_two_dinosaurs_windows_2.6.png  License: unknown  Contributors: Luuva andrubik-wuerfel. Original uploader was Rubik-wuerfel at en.wikibooksImage:Filtershurl.png  Source: http://en.wikibooks.org/w/index.php?title=File:Filtershurl.png  License: unknown  Contributors: Original uploader was Nmn at en.wikibooksimage:metaleffect1.png  Source: http://en.wikibooks.org/w/index.php?title=File:Metaleffect1.png  License: Creative Commons Attribution-Sharealike 3.0,2.5,2.0,1.0  Contributors: Originaluploader was Soeb at en.wikibooksImage:Filtersmotionblur.png  Source: http://en.wikibooks.org/w/index.php?title=File:Filtersmotionblur.png  License: unknown  Contributors: Original uploader was Nmn at en.wikibooksImage:metaleffect2.png  Source: http://en.wikibooks.org/w/index.php?title=File:Metaleffect2.png  License: Creative Commons Attribution-Sharealike 3.0,2.5,2.0,1.0  Contributors: Originaluploader was Kirun at en.wikibooks. Later version(s) were uploaded by Soeb, Iamunknown at en.wikibooks.image:metaleffect3.png  Source: http://en.wikibooks.org/w/index.php?title=File:Metaleffect3.png  License: Creative Commons Attribution-Sharealike 3.0,2.5,2.0,1.0  Contributors: Originaluploader was Kirun at en.wikibooks. Later version(s) were uploaded by Soeb, Iamunknown at en.wikibooks.Image:Gimp-balloon1.png  Source: http://en.wikibooks.org/w/index.php?title=File:Gimp-balloon1.png  License: Public Domain  Contributors: Original uploader was Kirun at en.wikibooksImage:Gimp-balloon2.png  Source: http://en.wikibooks.org/w/index.php?title=File:Gimp-balloon2.png  License: unknown  Contributors: Original uploader was Kirun at en.wikibooksImage:Gimp-balloon3.png  Source: http://en.wikibooks.org/w/index.php?title=File:Gimp-balloon3.png  License: unknown  Contributors: Original uploader was Kirun at en.wikibooksImage:Gimp-balloon4.png  Source: http://en.wikibooks.org/w/index.php?title=File:Gimp-balloon4.png  License: Public Domain  Contributors: Original uploader was Kirun at en.wikibooksImage:Solidnoise.png  Source: http://en.wikibooks.org/w/index.php?title=File:Solidnoise.png  License: Public Domain  Contributors: Original uploader was Nmn at en.wikibooksImage:Smoothsolidnoise.png  Source: http://en.wikibooks.org/w/index.php?title=File:Smoothsolidnoise.png  License: Public Domain  Contributors: Original uploader was Nmn at en.wikibooksImage:Newlayer.png  Source: http://en.wikibooks.org/w/index.php?title=File:Newlayer.png  License: unknown  Contributors: Original uploader was Nmn at en.wikibooks. Later version(s) wereuploaded by Chelseafan528, Soeb at en.wikibooks.File:GIMP Plasma.png  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP_Plasma.png  License: Public Domain  Contributors: Original uploader was Nmn at en.wikibooksImage:Heavyplasma.png  Source: http://en.wikibooks.org/w/index.php?title=File:Heavyplasma.png  License: Public Domain  Contributors: Original uploader was Nmn at en.wikibooksImage:Stone_gimp.png  Source: http://en.wikibooks.org/w/index.php?title=File:Stone_gimp.png  License: Public Domain  Contributors: Original uploader was Nmn at en.wikibooksImage:Stoneseamless.png  Source: http://en.wikibooks.org/w/index.php?title=File:Stoneseamless.png  License: Public Domain  Contributors: Original uploader was Nmn at en.wikibooksImage:gimpbubble01.png  Source: http://en.wikibooks.org/w/index.php?title=File:Gimpbubble01.png  License: Public Domain  Contributors: TatarigamiImage:gimpbubble02.png  Source: http://en.wikibooks.org/w/index.php?title=File:Gimpbubble02.png  License: unknown  Contributors: Original uploader was Tatarigami at en.wikibooks. Laterversion(s) were uploaded by Soeb at en.wikibooks.Image:gimpbubble03.png  Source: http://en.wikibooks.org/w/index.php?title=File:Gimpbubble03.png  License: unknown  Contributors: Original uploader was Tatarigami at en.wikibooks. Laterversion(s) were uploaded by Soeb at en.wikibooks.Image:gimpbubble04.png  Source: http://en.wikibooks.org/w/index.php?title=File:Gimpbubble04.png  License: unknown  Contributors: Original uploader was Tatarigami at en.wikibooksImage:gimpbubble05.png  Source: http://en.wikibooks.org/w/index.php?title=File:Gimpbubble05.png  License: Public Domain  Contributors: TatarigamiImage:gimpbubble06.png  Source: http://en.wikibooks.org/w/index.php?title=File:Gimpbubble06.png  License: unknown  Contributors: Original uploader was Tatarigami at en.wikibooksImage:gimpbubble07.png  Source: http://en.wikibooks.org/w/index.php?title=File:Gimpbubble07.png  License: unknown  Contributors: Original uploader was Tatarigami at en.wikibooksImage:gimpbubble08.png  Source: http://en.wikibooks.org/w/index.php?title=File:Gimpbubble08.png  License: unknown  Contributors: Original uploader was Tatarigami at en.wikibooksImage:gimpbubble09.png  Source: http://en.wikibooks.org/w/index.php?title=File:Gimpbubble09.png  License: Public Domain  Contributors: TatarigamiImage:gimpbubble10.png  Source: http://en.wikibooks.org/w/index.php?title=File:Gimpbubble10.png  License: unknown  Contributors: Original uploader was Tatarigami at en.wikibooksImage:gimpbubble11.png  Source: http://en.wikibooks.org/w/index.php?title=File:Gimpbubble11.png  License: Public Domain  Contributors: TatarigamiImage:gimpbubble12.png  Source: http://en.wikibooks.org/w/index.php?title=File:Gimpbubble12.png  License: unknown  Contributors: Original uploader was Tatarigami at en.wikibooksImage:gimpbubble13.png  Source: http://en.wikibooks.org/w/index.php?title=File:Gimpbubble13.png  License: Public Domain  Contributors: TatarigamiImage:gimpbubble14.png  Source: http://en.wikibooks.org/w/index.php?title=File:Gimpbubble14.png  License: unknown  Contributors: Original uploader was Tatarigami at en.wikibooksImage:gimpbubble15.png  Source: http://en.wikibooks.org/w/index.php?title=File:Gimpbubble15.png  License: Public Domain  Contributors: TatarigamiImage:gimpbubble16.png  Source: http://en.wikibooks.org/w/index.php?title=File:Gimpbubble16.png  License: unknown  Contributors: Original uploader was Tatarigami at en.wikibooksImage:gimpbubble17.png  Source: http://en.wikibooks.org/w/index.php?title=File:Gimpbubble17.png  License: Public Domain  Contributors: TatarigamiImage:ScreenShot005.jpg  Source: http://en.wikibooks.org/w/index.php?title=File:ScreenShot005.jpg  License: unknown  Contributors: Original uploader was Mikfoz at en.wikibooks. Laterversion(s) were uploaded by Adrignola at en.wikibooks.

Image Sources, Licenses and Contributors 78

Image:ScreenShot009.jpg  Source: http://en.wikibooks.org/w/index.php?title=File:ScreenShot009.jpg  License: unknown  Contributors: Original uploader was Mikfoz at en.wikibooksImage:ScreenShot010.jpg  Source: http://en.wikibooks.org/w/index.php?title=File:ScreenShot010.jpg  License: unknown  Contributors: Original uploader was Mikfoz at en.wikibooksImage:ScreenShot014.jpg  Source: http://en.wikibooks.org/w/index.php?title=File:ScreenShot014.jpg  License: unknown  Contributors: Original uploader was Mikfoz at en.wikibooksImage:Gimp hdr_regular.jpg  Source: http://en.wikibooks.org/w/index.php?title=File:Gimp_hdr_regular.jpg  License: GNU Free Documentation License  Contributors: Reub2000Image:Gimp hdr_under.jpg  Source: http://en.wikibooks.org/w/index.php?title=File:Gimp_hdr_under.jpg  License: GNU Free Documentation License  Contributors: Reub2000Image:Gimp hdr_over.jpg  Source: http://en.wikibooks.org/w/index.php?title=File:Gimp_hdr_over.jpg  License: GNU Free Documentation License  Contributors: Reub2000Image:Zoomedunaligned.jpg  Source: http://en.wikibooks.org/w/index.php?title=File:Zoomedunaligned.jpg  License: GNU Free Documentation License  Contributors: Reub2000Image:Gimp_hdr_duplicate.png  Source: http://en.wikibooks.org/w/index.php?title=File:Gimp_hdr_duplicate.png  License: GNU Free Documentation License  Contributors: Reub2000Image:Gimp_hdr_thresholdhighlights.jpg  Source: http://en.wikibooks.org/w/index.php?title=File:Gimp_hdr_thresholdhighlights.jpg  License: GNU Free Documentation License Contributors: Reub2000Image:Gimp_hdr_rough.jpg  Source: http://en.wikibooks.org/w/index.php?title=File:Gimp_hdr_rough.jpg  License: GNU Free Documentation License  Contributors: Reub2000Image:Gimp_hdr_gausian_result.jpg  Source: http://en.wikibooks.org/w/index.php?title=File:Gimp_hdr_gausian_result.jpg  License: GNU Free Documentation License  Contributors:Reub2000File:GIMP combined.jpg  Source: http://en.wikibooks.org/w/index.php?title=File:GIMP_combined.jpg  License: Creative Commons Attribution-Sharealike 2.5  Contributors: Adrignola,Reub2000Image:Rosa_Gold_Glow_2_with_interference.jpg  Source: http://en.wikibooks.org/w/index.php?title=File:Rosa_Gold_Glow_2_with_interference.jpg  License: GNU Free DocumentationLicense  Contributors: Akinom, Anna reg, DcoetzeeImage:Cleaning up Fourier screenshot gimp 1.png  Source: http://en.wikibooks.org/w/index.php?title=File:Cleaning_up_Fourier_screenshot_gimp_1.png  License: Creative CommonsAttribution-ShareAlike 3.0 Unported  Contributors: Alejo2083, Gaaarg, Nevit, Shooke, XhienneImage:Cleaning up Fourier screenshot gimp 2.png  Source: http://en.wikibooks.org/w/index.php?title=File:Cleaning_up_Fourier_screenshot_gimp_2.png  License: Creative CommonsAttribution-ShareAlike 3.0 Unported  Contributors: Alejo2083, Gaaarg, Nevit, Shooke, XhienneImage:Cleaning up Fourier screenshot gimp 3.png  Source: http://en.wikibooks.org/w/index.php?title=File:Cleaning_up_Fourier_screenshot_gimp_3.png  License: Creative CommonsAttribution-ShareAlike 3.0 Unported  Contributors: Alejo2083, Gaaarg, Nevit, Shooke, XhienneImage:Rosa_Gold_Glow_2_with_interference_red_fourier.gif  Source: http://en.wikibooks.org/w/index.php?title=File:Rosa_Gold_Glow_2_with_interference_red_fourier.gif  License:Creative Commons Attribution-ShareAlike 3.0 Unported  Contributors: Alessio DamatoImage:Cleaning up Fourier screenshot gimp 4.png  Source: http://en.wikibooks.org/w/index.php?title=File:Cleaning_up_Fourier_screenshot_gimp_4.png  License: Creative CommonsAttribution-ShareAlike 3.0 Unported  Contributors: Alejo2083, Gaaarg, Nevit, Shooke, XhienneImage:Cleaning up Fourier screenshot gimp 5.png  Source: http://en.wikibooks.org/w/index.php?title=File:Cleaning_up_Fourier_screenshot_gimp_5.png  License: Creative CommonsAttribution-ShareAlike 3.0 Unported  Contributors: Alejo2083, Gaaarg, Nevit, Shooke, XhienneImage:Rosa_Gold_Glow_2_with_interference_removed.jpg  Source: http://en.wikibooks.org/w/index.php?title=File:Rosa_Gold_Glow_2_with_interference_removed.jpg  License: CreativeCommons Attribution-ShareAlike 3.0 Unported  Contributors: Alessio DamatoImage:Thegimp-layer-cap.png  Source: http://en.wikibooks.org/w/index.php?title=File:Thegimp-layer-cap.png  License: unknown  Contributors: Original uploader was Kirun at en.wikibooksImage:shine01.png  Source: http://en.wikibooks.org/w/index.php?title=File:Shine01.png  License: Public Domain  Contributors: JeffayleImage:shine02.png  Source: http://en.wikibooks.org/w/index.php?title=File:Shine02.png  License: Public Domain  Contributors: JeffayleImage:shine03.png  Source: http://en.wikibooks.org/w/index.php?title=File:Shine03.png  License: Public Domain  Contributors: JeffayleImage:shine04.png  Source: http://en.wikibooks.org/w/index.php?title=File:Shine04.png  License: GNU General Public License  Contributors: WikignomeImage:shine05.png  Source: http://en.wikibooks.org/w/index.php?title=File:Shine05.png  License: unknown  Contributors: Original uploader was Jeffayle at en.wikibooksImage:shine06.png  Source: http://en.wikibooks.org/w/index.php?title=File:Shine06.png  License: Public Domain  Contributors: JeffayleImage:shine07.png  Source: http://en.wikibooks.org/w/index.php?title=File:Shine07.png  License: Public Domain  Contributors: Jeffayle

LicenseCreative Commons Attribution-Share Alike 3.0 Unported//creativecommons.org/licenses/by-sa/3.0/