Pixel Measurements

An image is an organized collection of values. Each value that makes up a monochrome image is characterized by three quantities: the two numbers that specify the pixel's position in the image, and the numerical value of the pixel. The first two values are pixel coordinates, and the third is the pixel value. Color images are characterized by five or more quantities: two pixel coordinates, and three or more color pixel values. The color channels may represent red, green, and blue color planes, or they may represent color in a luminance/chrominance color space, as luminance, color hue, and color saturation.

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