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1. Getting Started > Graphics Systems

Graphics Systems

The two major systems for representing graphic information on computers are raster and vector graphics.

Raster Graphics

In raster graphics, an image is represented as a rectangular array of picture elements or pixels (see Figure 1-1). Each pixel is represented either by its RGB color values or as an index into a list of colors. This series of pixels, also called a bitmap, is often stored in a compressed format. Since most modern display devices are also raster devices, displaying an image requires a viewer program to do little more than uncompress the bitmap and transfer it to the screen.

Raster graphic rectangle
Figure 1-1. Raster graphic rectangle

Vector Graphics


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