Computer Literacy InputDevices Keyboard Mouse Touch Scanners Pen-based Voice COMPUTER Computer Literacy

Computer LiteracyComputer LiteracyComputer LiteracyComputer Literacy

Input Input

DevicesDevices

Keyboard

Mouse

Touch

Scanners

Pen-based

Voice

COMPUTER


Keyboard

Mouse

Touch

Scanners

Pen-based

Voice

COMPUTER


Pressure SensitivePressure Sensitive

Touch pads use a pressure-sensitive membranethat has a built-in grid of sensing wires.


InfraredInfrared

InfraredLEDs

Photodetectors

One way of implementing touch screen technology is by criss-crossing the screen with invisible beams of infrared light. When your finger nears the screen, it interrupts the beams of light and the coordinate is determined.


Keyboard

Mouse

Touch

Scanners

Pen-based

Voice

COMPUTER




Keyboard

Mouse

Touch

Scanners

Pen-based

Voice

COMPUTER


Mark sense

OCR

MICR

UPC

Graphics/Text

Scanners


Mark sense

OCR

MICR

UPC

Graphics/Text

Scanners


Mark sense

OCR

MICR

UPC

Graphics/Text

Scanners


OCROCR

Most OCR devices store character patterns in ROM. Characters that are read are compared with the character patterns stored in memory and are matched on the basis of the lightness and darkness.


FONTSFONTS


Font CharacteristicsFont Characteristics Font CharacteristicsFont Characteristics Orientation - Portrait or landscapeOrientation - Portrait or landscape Spacing - Proportional or fixedSpacing - Proportional or fixed Pitch - Characters per horizontal inchPitch - Characters per horizontal inch Point size - Character heightPoint size - Character height Style - Upright or italicStyle - Upright or italic Stroke weight - Medium or boldStroke weight - Medium or bold Typeface - Courier, Times Roman, Helvetica, etc.Typeface - Courier, Times Roman, Helvetica, etc.


OrientationOrientation

Portrait Landscape


SpacingSpacing

W I

W I

FIXEDFIXED

PROPORTIONALPROPORTIONAL


This pitch is 10 characters/inch

This pitch is 12 characters/inch

This pitch is 16.67 characters/inch

Number of Characters per horizontal inchNumber of Characters per horizontal inch

PitchPitch


Times Roman 2 pt

Times Roman 6 pt

Times Roman 12 pt

Times Roman 24 pt

Times Roman 36 pt

Times Roman 72 pt


Point Size(1 pt = 1/72 inch)

StyleStyle

UPRIGHT UPRIGHT

ITALIC ITALIC


Stroke WeightStroke Weight

MEDIUM MEDIUM

BOLD BOLD BOLD


Type FaceType Face

Times Roman

HelveticaTrafalgarAlgerian

Wide Latin

Script


Serifs UP!!!Serifs UP!!!

Times RomanTimes RomanThe World’s Most The World’s Most Readable Serif TypefaceReadable Serif Typeface

Aa Bb CcABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqurstuvwxy

HelveticaHelveticaThe InternationalThe InternationalSans Serif TypefaceSans Serif Typeface

Aa Bb CcABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqurstuvwxy


Mark sense

OCR

MICR

UPC

Graphics/Text

Scanners


MICRMICR

CheckRoutingSymbol

ABATransitNumber

AccountNumber

ProcessControlNumber

Amount


Mark sense

OCR

MICR

UPC

Graphics/Text

Scanners


UPCUPC

Start / End Markers

ManufacturerID# Product

ID#

4 8 0 0 1 2 6 5 6 8


Mark sense

OCR

MICR

UPC

Graphics/Text

Scanners



Keyboard

Mouse

Touch

Scanners

Pen-based

Voice

COMPUTER


Voice RecognitionVoice Recognition

“COPY”

Microphone

1010010101

analog todigital

converter

patternmatching

templatelibrary

1010010100

input tocomputer

system


1010010101

Voice Voice

ControlControl

SoftwareSoftware


Voice Voice

DictationDictation

SoftwareSoftware


Keyboard

Mouse

Touch

Scanners

Pen-based

Voice

COMPUTER

+ “others”+ “others”



Digital CamerasDigital Cameras

• Magnetic StripesMagnetic Stripes & Smart Cards & Smart Cards

• ATM’sATM’s

• POS’sPOS’s

Light PenLight Pen Digitizer Tablet Digitizer Tablet

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Computer Literacy InputDevices Keyboard Mouse Touch Scanners Pen-based Voice COMPUTER Computer Literacy