Copyright Prentice-Hall, Inc. 2001

Information Input and Output

Information Input and Output

Chapter 8

5-2Let’s InterfaceLet’s Interface

Monthly Monthly Technology UpdateTechnology Update

5-3Traditional Input DevicesTraditional Input Devices

Point-and-Draw DevicesPoint-and-Draw DevicesKeyboardsKeyboards

5-4KeyboardsKeyboards

•Alphanumeric•Special-function•Function keys

•Text cursor•Menu

•QWERTY

•Alphanumeric•Special-function•Function keys

•Text cursor•Menu

•QWERTY

5-5Point-and-Draw DevicesPoint-and-Draw Devices

•GUI•Mouse cursor

•Click•Double-click

•Drag

•GUI•Mouse cursor

•Click•Double-click

•Drag

5-6Point-and-Draw DevicesPoint-and-Draw Devices

Trackpad

Digitizer Tablet and

Pen

JoystickTrackball

Trackpoint

Photos Courtesy of:• Imation Corporation

•Houston Instrument Div. AMETEK, Inc.•Advanced Gravis Computer Technology Ltd.

5-7Source-Data AutomationSource-Data Automation

Need to enter data more quickly, Need to enter data more quickly, efficiently, and as close to the source as efficiently, and as close to the source as possiblepossible

How? How? ScannersScanners Smart CardsSmart Cards Speech RecognitionSpeech Recognition Vision-Input SystemsVision-Input Systems Digital Cameras Digital Cameras

InputInput

5-8Input Devices - ScannersInput Devices - Scanners

OCROCR Optical Character Recognition

Bar codesBar codes

Courtesy of International Business Machines Corporation and Caere Corporation

Laser Contact

Two scanner types:Two scanner types:

5-93 Basic Scanner Categories3 Basic Scanner Categories(OCR and Bar codes)(OCR and Bar codes)

Handheld label scannersHandheld label scanners Wand scannersWand scanners Can use contact or laser technologyCan use contact or laser technology

Stationary label scannersStationary label scanners Common in grocery storesCommon in grocery stores Use laser technology onlyUse laser technology only

Document scannersDocument scanners Can scan documents of various sizesCan scan documents of various sizes Can create a turnaround documentCan create a turnaround document

5-10Image ScannersImage Scanners

Digitizes an imageDigitizes an image Image Processing: Image Processing: manipulatingmanipulating and and managingmanaging scanned images scanned images

Two types:Two types: Page image scannersPage image scanners Hand image scannersHand image scanners

Paperless societyPaperless society

Photo courtesy of Hewlett-Packard Company

5-11Cards Using TechnologyCards Using Technology

Magnetic stripe Magnetic stripe encoded with dataencoded with data

Great for storing Great for storing confidential confidential informationinformation

Badge readersBadge readers

Courtesy of Gemplus

Contains Contains microprocessormicroprocessor

May soon replace May soon replace magnetic stripe magnetic stripe cardscards

Stored-value cardsStored-value cards

Magnetic Stripe Cards Smart Cards

5-12Speech RecognitionSpeech Recognition

““Killer App” includesKiller App” includes SoftwareSoftware Generic vocabulary Generic vocabulary

databasedatabase High-quality microphoneHigh-quality microphone

Need to train systemNeed to train system Speaker-Independent Speaker-Independent

systemssystems

Courtesy of Dragon Systems Inc.

5-13Vision-Input SystemsVision-Input Systems

Uses a camera to digitize the imageUses a camera to digitize the image Stores digitized image in a databaseStores digitized image in a database Continually compares new images to Continually compares new images to

stored images in databasestored images in database Suited to very specialized tasks like Suited to very specialized tasks like

quality-control inspectionsquality-control inspections

5-14Digital CamerasDigital Cameras

5-15Mr. Potato Head wants to Mr. Potato Head wants to know:know:

Are you Are you getting getting

the the picture?picture?

Is it Is it making making sense?sense?

GOOD!!

5-16Output DevicesOutput Devices

MonitorsMonitors PrintersPrinters

Multimedia ProjectorsMultimedia Projectors Voice - Response SystemsVoice - Response Systems

OutputOutput

5-17What Determines a What Determines a Monitor’s Capabilities?Monitor’s Capabilities? Graphics AdapterGraphics Adapter SizeSize ResolutionResolution Display QualityDisplay Quality

5-18Graphic AdapterGraphic Adapter

Device controller for the monitorDevice controller for the monitor Inserted into expansion slotInserted into expansion slot AGP technologyAGP technology Video RAM (VRAM)Video RAM (VRAM)

5-19

15” Monitor15” Monitor 17” Monitor17” Monitor

Monitor SizeMonitor Size

19” Monitor19” Monitor

Balance what you need with what you can afford.

5-20

1024 pixels1024 pixels

768768pixelspixels

Students are great!Students are great!

The size of the screen image is measured in pixels.

Screen ResolutionScreen Resolution

5-21

Higher ResolutionHigher ResolutionLow ResolutionLow Resolution

The distance between centers of adjacent pixels.The distance between centers of adjacent pixels.

.28mm (millimeters) or less is recommended!.28mm (millimeters) or less is recommended!

Dot PitchDot Pitch

5-22

The number of times per second the screen image is The number of times per second the screen image is redrawn.redrawn.

80 Hz or better 80 Hz or better andand non-interlaced is non-interlaced is recommended!recommended!

Vertical Refresh RateVertical Refresh Rate

5-23

Main difference is refresh rate.

Main difference is refresh rate.

Flat Panel Monitors (LCD)Flat Panel Monitors (LCD)

Passive is much slower - can’t play video/animation!Passive is much slower -

can’t play video/animation!

Active vs.

Passive Matrix

Active vs.

Passive Matrix

Courtesy of ViewSonic® Corporation

5-24Touch ScreensTouch Screens

Courtesy of Diebold Incorporated

5-25PrintersPrinters

CostCost Color vs. black and whiteColor vs. black and white Output volume needsOutput volume needs Output quality needsOutput quality needs Special feature needsSpecial feature needs Network concernsNetwork concerns

PrintersPrinters

Purchase Considerations

Purchase Considerations

5-26Page PrintersPage Printers

Laser, LED, LCSLaser, LED, LCS Near-typeset-qualityNear-typeset-quality 600 dpi to 1200 dpi600 dpi to 1200 dpi

5-27Ink-jet PrintersInk-jet Printers

Budget-minded Budget-minded consumer’s choiceconsumer’s choice

600 dpi and up600 dpi and up Inexpensive for color Inexpensive for color

abilitiesabilities

5-28Other PrintersOther Printers

Large-Format Large-Format Ink-Jet PrintersInk-Jet Printers

Dot Matrix Dot Matrix PrintersPrinters

MultifunctionMultifunctionPeripheralPeripheral

5-29Other Output DevicesOther Output Devices

Presentation GraphicsPresentation Graphics LCD PanelsLCD Panels LCD ProjectorsLCD Projectors

Voice-Response SystemsVoice-Response Systems Reproduction of human voice/soundsReproduction of human voice/sounds Speech synthesisSpeech synthesis

5-30TerminalsTerminals

Dumb and smart terminals:Dumb and smart terminals: Video display terminal (VDT) Video display terminal (VDT) Dumb: monitor and keyboard only Dumb: monitor and keyboard only Smart terminals: may have RAM and Smart terminals: may have RAM and

processor, but not meant for stand-aloneprocessor, but not meant for stand-alone Telephone terminals and telephonyTelephone terminals and telephony

Integration of computers and telephonesIntegration of computers and telephones ATM and POSATM and POS

TerminalsTerminals

Copyright Prentice-Hall, Inc. 2001

End of Chapter 8End of Chapter 8

Interactive Interactive Study GuideStudy Guide