Chapter 5: InputChapter 5: Input

CSC 151CSC 151Beth MyersBeth MyersKristy HellerKristy HellerJulia ZachokJulia Zachok

What is Input?What is Input?

Input is any data or Input is any data or instructions entered instructions entered into the memory of a into the memory of a

computercomputer

FormsForms

Instructions entered into the Instructions entered into the computer can be in the form of computer can be in the form of programs, commands, and user programs, commands, and user responsesresponses

Data consists of a collection of Data consists of a collection of unprocessed text, numbers, unprocessed text, numbers, images, audio, or videoimages, audio, or video

What are input What are input devices?devices?

Any hardware component that Any hardware component that allows users to enter data or allows users to enter data or instructions into a computerinstructions into a computer

Input devicesInput devices KeyboardKeyboard MouseMouse StylusStylus Digital PenDigital Pen MicrophoneMicrophone Digital cameraDigital camera ScannerScanner

KeyboardKeyboard Input device that Input device that

contains keys users contains keys users press to enter data press to enter data into the computerinto the computer

101 – 105 keys101 – 105 keys Includes letters, Includes letters,

numbers, numbers, punctuation marks, punctuation marks, commands, toggle commands, toggle keys, and function keys, and function keys keys

Pointing DevicesPointing Devices An input device that allows a user An input device that allows a user

to control a pointer on the screento control a pointer on the screen PointerPointer – a small symbol on the – a small symbol on the

screen whose location and shape screen whose location and shape change as a user moves a pointing change as a user moves a pointing device device Select text and graphics; move insertion Select text and graphics; move insertion

point; click buttons, icons, links, and point; click buttons, icons, links, and menu commandsmenu commands

Mouse Mouse A pointing device A pointing device

that fits that fits comfortably under comfortably under the palm of your the palm of your handhand

TypesTypes Optical mouseOptical mouse Mechanical mouseMechanical mouse Cordless mouseCordless mouse

TrackballTrackball

A pointing device A pointing device with a ball on its with a ball on its top and usually top and usually has one or more has one or more buttons that work buttons that work as mouse as mouse buttonsbuttons

TouchpadTouchpad A small, flat, A small, flat,

rectangular rectangular pointing device pointing device that is sensitive that is sensitive to pressure and to pressure and motionmotion

Touchpads are Touchpads are usually found on usually found on laptops laptops

Pointing StickPointing Stick A pressure A pressure

sensitive pointing sensitive pointing device shaped like device shaped like a pencil eraser that a pencil eraser that is positioned is positioned between keys on a between keys on a keyboardkeyboard

Pointing sticks are Pointing sticks are usually found on usually found on laptopslaptops

JoystickJoystick

A vertical lever A vertical lever mounted on a mounted on a base; includes base; includes buttons called buttons called triggerstriggers

WheelWheel

Steering wheel Steering wheel type input device type input device used to simulate used to simulate driving driving

Includes foot Includes foot pedalspedals

Light PenLight Pen A handheld input A handheld input

device that can device that can detect the detect the presence of light presence of light when pressed when pressed against the against the screenscreen Usually requires a Usually requires a

special monitorspecial monitor

Touch ScreenTouch Screen A touch sensitive A touch sensitive

display devicedisplay device Used for kiosks Used for kiosks

and ATM and ATM machinesmachines

Most PDAs, Tablet Most PDAs, Tablet Screens and Screens and some Notebook some Notebook Computers have Computers have touch screenstouch screens

Stylus and Digital PenStylus and Digital Pen

Looks like an ink Looks like an ink pen but uses pen but uses pressure to write pressure to write text and draw text and draw lineslines Originally called an Originally called an

electronic penelectronic pen Some have Some have

electronic erasers electronic erasers and programmable and programmable buttonsbuttons

Voice InputVoice Input The process of The process of

entering data by entering data by speaking into a speaking into a microphonemicrophone

Voice Recognition Voice Recognition is the computer’s is the computer’s capability of capability of distinguishing distinguishing spoken wordsspoken words

Audio InputAudio Input The process of The process of

entering any sound entering any sound into the computer into the computer such as speech, such as speech, music, and sound music, and sound effectseffects

The users input sound The users input sound via devices such as via devices such as microphones, tape microphones, tape players, CD/DVD, players, CD/DVD, players, or radiosplayers, or radios

PDAs/Tablet PCPDAs/Tablet PC PPersonal ersonal DDigital igital

AAssistantssistant Used with stylusUsed with stylus

The Tablet PC is The Tablet PC is larger in larger in comparison and comparison and uses a digital penuses a digital pen

Smart PhonesSmart Phones

Users can send Users can send graphics, graphics, pictures, video pictures, video clips, sound files, clips, sound files, and text and text messagesmessages

Digital CamerasDigital Cameras Allows users to take Allows users to take

pictures and store pictures and store the photographed the photographed images digitally images digitally instead of on instead of on traditional filmtraditional film Images can be Images can be

immediately viewedimmediately viewed You can input these You can input these

images onto your images onto your computer to edit and computer to edit and printprint

Video InputVideo Input

The process of The process of capturing full capturing full motion images motion images into a computer into a computer and storing them and storing them on a medium on a medium such as a hard such as a hard disk or DVDdisk or DVD

PC Video Cameras/PC Video Cameras/Web CamsWeb Cams

PC Video PC Video Cameras enable Cameras enable users to capture users to capture video and still video and still images, send video images, send video with e-mail, add with e-mail, add images to IM, make images to IM, make video telephone video telephone calls, and broadcast calls, and broadcast live on the Internetlive on the Internet

Web Cams display Web Cams display output on a web output on a web pagepage

ScannersScanners

Light sensing input Light sensing input device that reads device that reads printed text and printed text and graphics and then graphics and then translates the translates the results into a form results into a form the computer can the computer can processprocess Four types are Four types are

flatbed, pen, sheet-flatbed, pen, sheet-fed, and drumfed, and drum

Biometric InputBiometric Input BiometricsBiometrics – the – the

technology of technology of authenticating a authenticating a person’s identity by person’s identity by verifying the verifying the personal personal characteristicscharacteristics FingerprintsFingerprints VoiceVoice SignaturesSignatures Eye patterns Eye patterns

Any questions?Any questions?