Pixel

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In digital imaging, a pixel, pel, or picture element is a physical point in a raster image.

Description

The pixel is the smallest addressable element in an all points addressable display device, such as a computer monitor.

The address of a pixel corresponds to its physical coordinates.

LCD pixels are manufactured in a two-dimensional grid, and are often represented using dots or squares, but CRT pixels correspond to their timing mechanisms and sweep rates.

Each pixel is a sample of an original image; more samples typically provide more accurate representations of the original.

The intensity of each pixel is variable.

Color image systems

In color image systems, a color is typically represented by three or four component intensities such as:

  • Red, green, and blue
  • Cyan, magenta, yellow, and black.

Etymology

The word pixel is based on a contraction of pix ("pictures") and el (for "element"); similar formations with el for "element" include the words voxel and texel.

See Also

External Links