Bit Map

DEFINITION
The term bit map is often used as a synonym for raster image or "pix map".

Bit map more correctly refers to a raster image consisting of only black and white pixels.

EXPLANATION
Each pixel of a raster image requires a certain amount of memory to store the color shown in the pixel. Pixels in a black and white image require only one bit per pixel. These bits correspond, or map, to positions in the image, leading to the idea of a "bit map".

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