No matter how data is compressed, it must be decompressed before it can be viewed.
Decompression Reverses the procedure used to compress an image.
Dithering Diffuses many adjacent colours into a single apparent colour. With this technique the human eye is fooled into seeing more colours than are actually present in an image. The colours which make up a picture in a graphics file. Raster Graphics Images created using a set of pixels, in a column and row format. Also called Bit Mapped Graphics.