Post on 16-Dec-2015
Copyright Prentice-Hall, Inc. 2001
Information Input and Output
Information Input and Output
Chapter 8
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
5-15Mr. 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
5-25PrintersPrinters
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