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Chapter 7 : Extending Capabilities of Computer :and Mobile Devices…
Chapter 7 : Extending Capabilities of Computer :and Mobile Devices
PEN INPUT
Graphics tablet/Digitizer : is an electronic plastic board detects&convertss movement of digital pen into signal, sent to the computer
MOTION INPUT :
Called gesture recognition,users can guide on screen elements using air gestures
VOICE INPUT :
Process of entering input by speaking into a microphone.
Voice recognition called speech recognition , is the computer or mobile device's capability of distinguishing spoken words.
AUDIO INPUT
Process of entering any sound into the computer such as speech , music and sound effects.
Music production software allows users to record compose,mix and edit music and sounds.
VIDEO INPUT
Process of capturing full-motion images and storing them on a computer/mobile device's storage medium.
example : WEBCAM
Videoconference : meeting between two or more geographically separated people
SCANNER AND READING DEVICES
Scanner is a light-sensing input device that reads printed text and graphics and then translates the results into a form the computer can process
A flatbed scanner : to a copy machine except it creates a file of the document in memory instead of a paper
An optical reader : devices that uses a light source to read characters,mark, and codes and them convert them into digital data that acomputer can process
example : Optical character recognition (OCR) & Optical mark recognition (OMR)
A bar code reader uses laser beams to read bar codes
A QR code stores infprmation in both a vertical and horizontal direction
Radio frequency identification (RFID).
uses a radio signals to communicate with a tag placed in or attached to an object
An RFID reader reads information on the tag via radio waves