Computer graphics is an art of drawing pictures, lines, charts, etc using computers with the help of programming. Computer graphics is made up of number of pixels. Pixel is the smallest graphical picture or unit represented on the computer screen. Basically there are two types of computer graphics namely
Interactive computer graphics: It is the computer graphics in which user can interact with the image on the computer screen. Here exist two-way communication between the user and the image. The image is totally under the control of user. Example: Playing the computer game in the computer. Here user controls the image completely. According to the user wish image makes the movements on the screen.
Non-interactive computer graphics: it is the computer graphics in which user does not have any kind of control over the image. Image is merely the product of static stored program and will work according to the instructions given in the program linearly. The image is totally under the control of program instructions not under the user. Example: screen savers.