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GIF Optimization

GIF, or Graphics Interchange Format, is an indexed color image format created by CompuServe in 1987 (GIF87) and modified to support animation, transparency, and interlacing in 1989 (GIF89a).[5] GIFs have a maximum color bit-depth of 8, which stores a maximum of 256 colors. Indexed color images work well for buttons, bullet points, arrows, borders, and logos. They are not a good choice for photographs and 3D artwork.

[5] CompuServe, “Graphics Interchange Format—Version 89a,” (GIF89a) [online], (1990), available from the Internet at http://www.w3.org/Graphics/GIF/spec-gif89a.txt.

Indexed color images consist of a palette table and matrix of palette indexes instead of RGB color values. The maximum palette size is 256 colors. There are several advantages of this approach:


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