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A pixel is 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 for white (255 for an 8-bit pixel) . In a color image, each pixel has its own brightness and color, usually represented as a combination of red, green, and blue intensities (RGB).[1]


Though Adobe Illustrator and PostScript can handle the importation of pixel-based image formats, such as TIFF, Adobe's first dedicated raster graphics editor was Photoshop 1.0, released in February 1990.[2]


  1. Pixel at the Free On-Line Dictionary Of Computing. 1998-05-08.
  2. Thomas and John Knoll by Jeff Schewe, Photoshop News, originally published in PEI Magazine. 2000-09.

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