graphics (pixel) The smallest resolvable rectangular area of

an image, either on a screen or stored in memory. Each

pixel in a monochrome image has its own brightness, from 0

for black to the maximum value (e.g. 255 for an eight-bit

pixel) for white. In a colour image, each pixel has its own

brightness and colour, usually represented as a triple of red,

green and blue intensities (see RGB).