Pixel (Picture Element)
Pixel (Picture Element) – a) Related to a particular image address in digital systems or to the smallest reproducible element in an analog system. A single point on the screen. As an example, if a system is said to have a display resolution of 1280 by 1024, there are 1280 pixels per horizontal line and 1024 horizontal lines from the top of the screen to the bottom. b) A pixel is the digital representation of the smallest area of a television picture capable of being delineated by the bit stream, i.e., the digital value or set of values that defines the characteristics of a picture element. A pixel of a full color image is represented by a minimum of three components, reflecting the trichromatic nature of human vision. A pixel of a monochrome image may be represented by a single component. Pixels may carry additional information such as transparency. The total number of picture elements in a complete picture is of interest since this number provides a convenient way of comparing systems. c) One of the tiny points of light that make up the picture on a computer screen. The smaller and closer together the pixels are, the higher the resolution.
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