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
5-15 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)
5-19 15” Monitor 17” Monitor Monitor Size 19” Monitor Balance what you need with what you can afford.
5-20 1024 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. 2001 End of Chapter 8 Interactive Study Guide