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[1] [2] [3] Modern standards tend to use bits per component, [1] [2] [4] [5] but historical lower-depth systems used bits per pixel more often. Color depth is only one aspect of color representation, expressing the precision with which the amount of each primary can be expressed; the other aspect is how broad a range of colors can be expressed ...
8-bit color graphics are a method of storing image information in a computer's memory or in an image file, so that each pixel is represented by 8 bits (1 byte). The maximum number of colors that can be displayed at any one time is 256 per pixel or 2 8 .
The number of distinct colors that can be represented by a pixel depends on the number of bits per pixel (bpp). A 1 bpp image uses 1 bit for each pixel, so each pixel can be either on or off. Each additional bit doubles the number of colors available, so a 2 bpp image can have 4 colors, and a 3 bpp image can have 8 colors:
In an 8-bit color palette each pixel's value is represented by 8 bits resulting in a 256-value palette (2 8 = 256). This is usually the maximum number of grays in ordinary monochrome systems; each image pixel occupies a single memory byte.
The 4-bit per pixel (4bpp) format supports 16 distinct colors and stores 2 pixels per 1 byte, the left-most pixel being in the more significant nibble. [5] Each pixel value is a 4-bit index into a table of up to 16 colors. The 8-bit per pixel (8bpp) format supports 256 distinct colors and stores 1 pixel per 1 byte.
A number to indicate the color depth (e.g., 8, 10, or 12 bits per pixel) An indication of the method by which the data is stored, such as packed pixel or planar pixel;
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As of 2019, the most common image colorspace in graphics cards is the RGB color model with 8 bits per pixel color depth.Using this technique, 8 bits per pixel are used to describe the luminance level in each of the RGB channels, therefore 24 bits fully describe the color of each pixel.