Task 3 – Technical File

Pixel and resolution• Pixel - short for Picture Element, a pixel is a

single point in a graphic image. Graphics monitors display pictures by dividing the display screen into thousands (or millions) of pixels, arranged in rows and columns. The pixels are so close together that they appear connected.

• Resolution - is often used for a pixel count in digital imaging, higher resolution means more image detail.

Vector and Raster Images

• Raster images are based on pixels and thus scale with loss of clarity, while vector-based images can be scaled by any amount without degrading quality because, vector graphics is based on images made up of paths, or strokes through control points, its these points that define the parameters such as, colour, shape, thickness and a fill.

File formats and uses• Bmp – bitmap image file, used to store bitmap digital images• Png – portable network graphics, used as a bitmapped image format that uses

lossless data compression, supports transparency.• Gif – graphics interchange format, bitmap image format, supports animations• Tiff – tagged image file format, file format for storing images• Jpg/JPEG – image file format, used for its compression of images, also supports

layered images• Psd – Photoshop document, stores an image with support for most editing

options in Photoshop• Pdf – portable document format, file format used to show document in software,

hardware and operating systems.• Eps – encapsulated postscript, standard format for importing and exporting

postscript language files• Ai – adobe illustrator artwork, proprietary file format, representing sing-page

vector based drawing

Compression

• Compression is where a file is reduced in bit size to help reduce resources usage, such as hard drive space.

• There is lossless compression ( eliminates not needed data) and lossy compression (identifies marginally important information and removes it)

Image capture devices

• Devices that capture images such as, camera’s, software that take screenshots of your computer screen, or simply a computers automatic print screen command on the keyboard

Optimising

• The process of modifying a software system to make some aspect of it work more efficiently or use fewer resources.

• In general, a computer program may be optimized so that it executes more rapidly, or is capable of operating with less memory storage or other resources.

Storage and asset management

• Asset management refers to being in control of your digital files – renaming, backing up, grouping, archiving, maintaining, and exporting them to other formats.