The Interactive Glossary: Defining the Net
Dithering
When working with a computer display system that supports 8-bit color (or less), the video card can display only 256 different colors at one time. Dithering is a technique to simulate the display of colors that are not in the current color palette of a particular image. It accomplishes this by arranging adjacent pixels of different colors into a pattern which simulates colors that are not available to the computer.
