Computer Graphics

Computer graphics refer to images or animated motion picture displayed on a video display unit or printed on a printer. A computer graphics system basically consists of a computer to store and manipulate images, various input and output devices and a graphics software package that enable a computer to process graphics images. These packages enable a computer to drear color shade and manipulate the images held in its memory . A picture can be drawn on the screen with the use of a mouse, a pressure sensitive tablet or a light pen. Preexisting images on paper can be scanned into the computer  through the use of scanners or digital cameras. Frames of images on videotape also can memory to film recorder,which can print it on photographic film .Computers can also print hard copy in multi color by means of plotters, inkjet or laser printers.Computer graphics have found widespread use in printing, product design and manufacturing, scientific research and entertainment . In the business office, computer rountienly create graphs and tables to illustrate text information. Computer systems have replaced drafting boards in the design of a vast array of products ranging from buildings to automotive bodies and aircraft hulls to electrical and electronic device . Computer are also often used to test various mechanical,electrical or thermal properties of complicated systems in animated motion picture sequences. This pictorial visualization can afford a clearer understanding of the multiple forces or variables at work in such phenomena as nuclear and chemical reactions.