Types of output Output device

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1 types of output

1.1 graphics (visual)
1.2 tactile
1.3 audio
1.4 scent





types of output

some types of output text, graphics, tactile, audio, , video. text consists of characters used create words, sentences, , paragraphs. graphics digital representations of nontext information such drawings, charts, photographs, , animation . tactile output such raised line drawings may useful individuals blind. audio music, speech, or other sound. video consists of images played @ speeds provide appearance of full motion.


graphics (visual)

graphical output displayed on screen


a digital image numeric representation of image stored on computer. don t have physical size until displayed on screen or printed on paper. until point, collection of numbers on computer s hard drive describe individual elements of picture , how arranged. computers come built-in graphics capability of . others need device, called graphics card or graphics adapter board, has added. unless computer has graphics capability built motherboard, translation takes place on graphics card. depending on whether image resolution fixed, may of vector or raster type. without qualifications, term digital image refers raster images called bitmap images. raster images composed of pixels , suited photo-realistic images. vector images composed of lines , co-ordinates rather dots , more suited line art, graphs or fonts. make 3-d image, graphics card first creates wire frame out of straight lines. then, rasterizes image (fills in remaining pixels). adds lighting, texture , color.


tactile

haptic technology tactile feedback technology takes advantage of sense of touch applying forces, vibrations, or motions user. several printers , wax jet printers have capability of producing raised line drawings. there handheld devices use array of vibrating pins present tactile outline of characters or text under viewing window of device.


audio

speech output systems can used read screen text computer users. special software programs called screen readers attempt identify , interpret being displayed on screen , speech synthesizers convert data vocalized sounds or text. used produce music, speech or other sounds.


scent

see digital scent technology.








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