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  • 1. INPUT
  • 2. INPUT -Any data or instruction used by a computer. (computing essentials McGraw-Hill) -information fed into a data processing system or computer. (Merriam-webster) -what is put in, taken in, or operated on by any process or system. (Google.com)
  • 3. INPUT DEVICES Hardware to translate words, sounds, images, and actions that people understand into a form that system unit can process.  Eg: pointing devices, scanning, imagecapturing, and audio-input devices. 
  • 4. KEYBOARD ENTRY AUDIO-INPUT DEVICES POINTING DEVICE IMAGE CAPTURING DEVICES TOUCH SCREENS SCANNING DEVICES
  • 5. KEYBOARD ENTRY Converts numbers, letters and special characters that people understand into elecrtical signals.  These signals are sent, processed in the system unit.  Mostly are QWERTY types keyboard. 
  • 6.      TRADITIONAL KEYBOARDS: full sized, rigid, rectangular keyboards. Include functions, navigational & numeric keys ERGONOMICS: = as traditional. But the arrangement of keyboard is not rectangular and has palm rests. Designed to reduce stress. WIRELESS: self-explained. Transmit input to the system by air. PDA: keyboards for PDA’s and smartphones. VIRTUAL: image of keyboards on a touch screen. Screens function as the actual input device.
  • 7. Traditional PDA Wire-less
  • 8. Features    Combines a typewriter with a numeric keypad Used to enter numbers, and arithmetic symbols Also have many special purpose keys. (eg: toggle keys, f(x) keys, esc, navi, etc.)
  • 9. POINTING DEVICES  Pr0vide intuitive interface with system unit by accepting pointing gestures and converting them into machinereadable input.
  • 10. mice      Controls a pointer that is displayed on monitor. Can have one, two or more buttons. OPTICAL: has no moving parts and most widely used. Emits and senses light to detect mouse movements. MECHANICAL: has a ball on the bottom. Roller rotates and pointer moves on screen. CORDLESS: battery powered. Uses radio/infrared light waves to transmit input to system unit.
  • 11. Mechanical Wireless Optic
  • 12. DEVICES = MOUSE TRACKBALL: a.k.a the roller ball.  TOUCH PADS: control pointer by moving and tapping fingers on touch pads.  POINTING STICKS: located in middle of the keyboard. Controls pointers by directing the pointers. 
  • 13. TOUCH SCREENS: allows user to make interface using fingers or pen like devices. MULTITOUCH SCREENS: can be touched by more than one fingers. Enables interfaces such as rotating or zooming.  JOYSTICKS: popular with PC games. Varying pressure, speed and directions of the joysticks to control game actions.  STYLUS: pen like devices. Uses pressure to draw images on screens. Handwriting recognition devices translates handwritten notes into computer input. 
  • 14. Joystick Touchscreen s Touchpads Trackball Stylus
  • 15. What awaits us in years to come?
  • 16. SCANNING DEVICES Move across text and images.  Convert scanned text and image to a form that system unit can process. 
  • 17. OPTICAL SCANNERS Known simply as scanner, accepts documents consisting as text and/or images  Converts them to machine-readable form.  Do not recognize individual letters or images BUT recognize light, dark and colored areas that made up the the individual letters or images.  The files saved can be further modified. 
  • 18. FLATBED: similar to copy machines. Image scanned on glass surface and scanner recors image from below.  DOCUMENT: similar to flatbed only that it can quickly scan multiple documents. Automaticly feeds one page of a document at a time through a scanning surface.  PORTABLE: self explained. 
  • 19. Flatbe d Portabl e Document
  • 20. CARD READERS  Card readers interprets information stored in cards/chips. MAGNETIC: encoded information stored on a thin magnetic strip on the back of the card.  RADIO FREQUENCY: this cards have RFID (radio frequency identification) microchip that contains user’s encoded information. 
  • 21. BAR CODE READERS Either handheld or platform scanners.  Contain photoelectric cells that scan or reads bar codes. IIIIIIIIIII Almost all supermarkets and cash registers uses UPC (universal product code).  Read – supermarket’s computer (stores description, latest price and inventory) – process – update – provide cash registers with description and price for each product. 
  • 22. Barcode scanner
  • 23. CHARACTER AND MARK RECOGNITION DEVICES  Scanners that are able to recognize special characters and marks. Only specific for specific applications.
  • 24.    MAGNETIC-INK CHARACTER RECOGNITION(MICR): used by banks to read unusual numbers at the bottom of the checks and deposit slips. Read by reader/sorter and provides input. OPTICAL-CHARACTER RECOGNITION(OCR): uses special preprinted characters that can be read by alight source and changed into machine readable source. OPTICAL-MARK RECOGNITION(OMR): senses the presence or absence of mark, such as pencil mark.
  • 25. OCR OMR MICR
  • 26. IMAGE CAPTURING DEVICES  Create or capture original images.  DIGITAL CAMERA: image are recorded digitally on disk or in memory rather than film.  DIGITAL VIDEO CAMERAS: record motion digitally on disks or in memory. Most can take still image as well. Webcams are specialized digital video that captures image and send the to computers for broadcast.
  • 27. AUDIO INPUT DEVICES  Convert sound to a form that system unit can process. Mostly used is the microphone.  VOICE RECOGNITION SYSTEM: uses a mic, a sound card, a special software. This allows users to operate computers and other devices and create documents using voice commands.