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Banding

The visible break between colors in a gradient.

Binary

A number system with a base of any combination of one and zero, such as 00010100. Binary digits, 0 and 1, are also known as ons and offs. All computer images, text and code are reduced to binary numbers.

Bit

The smallest unit of memory or measure of binary information; a contraction from 'binary' and 'digit'.

Bitmap

A data file or structure which corresponds bit for bit with an image displayed on a screen. A bitmap is characterized by the width and height of the image in pixels and the number of bits per pixel which determines the number of shades of grey or colors the pixel can represent.

A pixel with 8 bits per color gives a 24 bit image.
(8 Bits X 3 colors is 24 bits.)
24 bit color resolution is 16.7 million colors.
16 bit color is 32,000 colors. (Macintosh Standard)
8 bit color is 256 colors. (Windows Standard)
8 bit gray scale is 256 shades of gray
4 bit is 64 colors or gray
2 bit is black and white.

Bitmap Graphics

Computer graphics in which an image is composed of an array of pixels arranged in rows and columns. Also called raster graphics.
Opposite= object-oriented or vector graphics

Byte

A measure of digital information equivalent to 8 bits; the basic unit of information.