Dithering

dithering - [graphics (computing)] The approximation of shades of gray or colors in a computer image made by arranging pixels of black and white or other colors in alternate layers. The technique gives the appearance of a wider range of color or shades than is actually present in the image. It is widely used to improve the appearance of images displayed on devices with limited color palettes.

[Category=Geospatial ]

Source: esri, 01 April 2012 09:42:29, http://support.esri.com/en/knowledgebase/GISDictionary/term/abbreviation