From Wikipedia, the free encyclopedia.
Grayscale or greyscale is a computing term referring to an image composed of shades of gray. It is kept distinct from the term "black and white", which in the context of computer imaging refers to an image with only two colors, black and white; a grayscale image has up to 256 colors. In most other contexts, the term "black and white" is used in place of "grayscale".
The same picture in three different color modes. The picture on the left is the original photograph, in full color. The picture in the center is in grayscale; all the colors contained in it are black, white, or any shade of gray. The picture on the right is in black and white, or monochrome; the only colors used in the picture are black and white, with no intermediary grays.
