Chapter 05 - Input

7/23/2019 Chapter 05 - Input

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Your Interactive Guide

to the Digital World

Discovering

Computers 2012

Chapter 5

Understanding Input


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Objectives Overview

Defne input anddierentiate among a

program, command, anduser response

Identiy the keys andbuttons commonly ound

on desktop computerkeyboards, and describe

how keyboards or mobilecomputers and devices

dier rom desktopcomputer keyboards

Describe dierent mousetypes and explain how to

use a mouse

Describe various types o

touch screens and explainhow a touch-sensitive pad

works

Describe various types o

pen input, and identiyother types o input or

smart phones

Summarie the purpose ovarious game controllers

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Objectives Overview

+xplain howresolution aectsthe uality o a

picture capturedon a digitalcamera

Describe the useso voice

recognition, eb

cams, and videoconerencing

Discuss howvarious scanners

and readingdevices work

Summarie thevarious biometric

devices

Discuss how ')Sterminals,

automated tellermachines, and

D.D kiosks work

Identiyalternative input

devices orphysically

challenged users

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What Is Input?

Inputis any data and instructionsentered into the memory o a computer

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What Is Input?

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Instructions can be entered into the computerin the orm o programs, commands, and userresponses

A program is a series of relatedinstructions that tells a computer what

tass to perform and how to performthem

!rograms respond to commands that auser issues

A user response is an instruction auser issues b" repl"ing to a #uestiondispla"ed b" a program


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What Are Input $evices

3n inputdevice is any

hardware

componentthat allows

users to enterdata and

instructionsinto acomputer

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&he 'e"board

3 e"boardis an input device thatcontains keys users press to enter dataand instructions into a computer

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&he 'e"board

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5ost desktop computer keyboardshave6

7etween $#$and $#& keys

3 numeric

keypad on theright side othe keyboard

2unction keys,

!89: keys, 3:8keys, andarrow keys

I;D)S key3'':I!38I);

key8oggle keys


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&he 'e"board

8he insertion point, also known as thecursor, is a symbol on the screen thatindicates where the next character you

type will appear

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&he 'e"board

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&he 'e"board

3n ergonomic keyboard has a designthat reduces the chance o wrist andhand in*uries

-rgonomicsincorporates comort,e=ciency, and saety into the design othe workplace

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&he 'e"board

?eyboards on mobile devices typicallyare smaller and@or have ewer keys

Some phones have predictive text input,which saves time when entering textusing the phoneAs keypad

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.ouse

5ouse operations

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Other !ointing $evices

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&ouch /creens and &ouch0/ensitive !ads

3 touch screenis a touch-sensitivedisplay device

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&ouch /creens and &ouch0/ensitive !ads

.icrosoft /urface &ouch0sensitive pads

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!en Input

ith pen input, you touch a st"lusordigital pen on a Bat surace to write, draw,or make selections

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Other Input for /mart !hones

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1ame ontrollers

.ideo games and computer games use agame controlleras the input device thatdirects movements and actions o on-screen

ob*ects

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1ame ontrollers

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$igital ameras

3 digital camerais a mobile devicethat allows users to take pictures andstore them digitally

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$igital ameras

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$igital ameras

8wo actors aect the uality o digital cameraphotos%

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ideo Input

ideo inputis the process o capturing ull-motionimages and storing them on a computerAs storagemedium

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ideo Input

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ideo ideo -diting on ouromputer

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http://var/www/apps/conversion/tmp/scratch_1/05_is_videoediting_a.wmvhttp://var/www/apps/conversion/tmp/scratch_1/05_is_videoediting_a.wmv


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ideo Input

3 Web camis a type o digital videocamera that enables a user to%

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ideo Input

3 video conferenceis a meetingbetween two or more geographicallyseparated people

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/canners and 7eading$evices

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Optical character recognition 8O79involves reading characters rom ordinarydocuments

3 turnaround documentis a document youreturn to the company that creates and sendsit

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Optical marrecognitionCO.7 reads hand-

drawn marks suchas small circles orrectangles

3n )59 device

scans thedocuments andmatches thepatterns o light

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3 bar codereader, also calleda bar code

scanneruses laserbeams to read barcodes

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7:I$Cradio reuency identifcation uses radiosignals to communicate with a tag placed in orattached to an ob*ect

3n 7:I$ readerreads inormation on the tag via

radio waves

92ID can track%

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.agnetic stripe card readersreadthe magnetic stripe on the back o cardssuch as%

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.I7Cmagnetic ink character recognition devicesread text printed with magnetied ink

3n .I7 readerconverts 5I!9 characters into aorm the computer can process

7anking industry uses 5I!9 or check processing

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Data collectiondevices obtain datadirectly at the locationwhere the transaction

or event takes place Esed in%

9estaurants

Frocery stores

2actories arehouses

8he outdoors

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;iometric Input

7iometrics authenticates a personAsidentity by veriying a personalcharacteristic

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!utting It All &ogether

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Documents

Chapter 05 - Input