A pixel (picture element) is the smallest piece of information in an image. Pixels are normally arranged in a regular 2-dimensional grid, and are often represented using dots or squares. Each pixel is a sample of an original image, where more samples typically provide a more accurate representation of the original.
The intensity of each pixel is variable in color systems, each pixel has typically three or four components such as red, green and blue, or cyan, magenta, yellow and black.
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