5-7 Source-Data Automation l Need to enter data more quickly, efficiently, and as close to the source as possible l How? u Scanners u Smart Cards u Speech Recognition u Vision-Input Systems u Digital Cameras Input
5-8 Input Devices - Scanners OCR Optical Character Recognition Bar codes Courtesy of International Business Machines Corporation and Caere Corporation Laser Contact Two scanner types:
5-9 3 Basic Scanner Categories (OCR and Bar codes) l Handheld label scanners u Wand scanners u Can use contact or laser technology l Stationary label scanners u Common in grocery stores u Use laser technology only l Document scanners u Can scan documents of various sizes u Can create a turnaround document
5-10 Image Scanners l Digitizes an image l Image Processing: manipulating and managing scanned images l Two types: u Page image scanners u Hand image scanners l Paperless society Photo courtesy of Hewlett-Packard Company
5-11 Cards Using Technology l Magnetic stripe encoded with data l Great for storing confidential information l Badge readers Courtesy of Gemplus l Contains microprocessor l May soon replace magnetic stripe cards l Stored-value cards Magnetic Stripe CardsSmart Cards
5-12 Speech Recognition l “Killer App” includes u Software u Generic vocabulary database u High-quality microphone l Need to train system l Speaker-Independent systems Courtesy of Dragon Systems Inc.
5-13 Vision-Input Systems l Uses a camera to digitize the image l Stores digitized image in a database l Continually compares new images to stored images in database l Suited to very specialized tasks like quality-control inspections
5-14 Digital Cameras
5-15 Mr. Potato Head wants to know: Are you getting the picture? Is it making sense? GOOD!!
5-16 Output Devices l Monitors l Printers l Multimedia Projectors l Voice - Response Systems Output
5-17 What Determines a Monitor’s Capabilities? l Graphics Adapter l Size l Resolution l Display Quality
5-18 Graphic Adapter l Device controller for the monitor l Inserted into expansion slot l AGP technology l Video RAM (VRAM)
” Monitor 17” Monitor Monitor Size 19” Monitor Balance what you need with what you can afford.
pixels 768pixels Students are great! The size of the screen image is measured in pixels. Screen Resolution
5-21 Higher Resolution Low Resolution The distance between centers of adjacent pixels..28mm (millimeters) or less is recommended! Dot Pitch
5-22 The number of times per second the screen image is redrawn. 80 Hz or better and non-interlaced is recommended! Vertical Refresh Rate
5-23 Main difference is refresh rate. 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
5-24 Touch Screens Courtesy of Diebold Incorporated
5-25 Printers l Cost l Color vs. black and white l Output volume needs l Output quality needs l Special feature needs l Network concerns Printers Purchase Considerations
5-26 Page Printers l Laser, LED, LCS l Near-typeset-quality l 600 dpi to 1200 dpi
5-27 Ink-jet Printers l Budget-minded consumer’s choice l 600 dpi and up l Inexpensive for color abilities
5-29 Other Output Devices l Presentation Graphics u LCD Panels u LCD Projectors l Voice-Response Systems u Reproduction of human voice/sounds u Speech synthesis
5-30 Terminals l Dumb and smart terminals: u Video display terminal (VDT) u Dumb: monitor and keyboard only u Smart terminals: may have RAM and processor, but not meant for stand-alone l Telephone terminals and telephony u Integration of computers and telephones l ATM and POS Terminals
Copyright Prentice-Hall, Inc End of Chapter 8 Interactive Study Guide