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2. Indexed color - Wikipedia

   en.wikipedia.org/wiki/Indexed_color

   A 2-bit indexed color image. The color of each pixel is represented by a number; each number (the index) corresponds to a color in the color table (the palette).. In computing, indexed color is a technique to manage digital images' colors in a limited fashion, in order to save computer memory and file storage, while speeding up display refresh and file transfers.

3. Palette (computing) - Wikipedia

   en.wikipedia.org/wiki/Palette_(computing)

   In computer graphics, a palette is the set of available colors from which an image can be made. In some systems, the palette is fixed by the hardware design, and in others it is dynamic, typically implemented via a color lookup table (CLUT), a correspondence table in which selected colors from a certain color space's color reproduction range are assigned an index, by which they can be referenced.

4. Comparison of graphics file formats - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_graphics...

   Color depth. Indexed color Trans-parency. Meta-data. Inter-lacing. Multi-page Anima-tion Layers Color manage-ment Extend­- able HDR format CMYK; AI: Lossy and lossless Both 8 bpc Yes Yes Yes No Yes No Yes Yes — No AVIF: AV1 Lossy and lossless: Raster 12 bpc No Yes Yes No No Yes No Yes Yes Yes No BMP: None, RLE, JPEG, and PNG Raster 16 bpc ...

5. BMP file format - Wikipedia

   en.wikipedia.org/wiki/BMP_file_format

   Indexed color images may be compressed with 4-bit or 8-bit RLE or Huffman 1D algorithm. OS/2 BITMAPCOREHEADER 2 24bpp images may be compressed with the 24-bit RLE algorithm. The 16bpp and 32bpp images are always stored uncompressed. Note that images in all color depths can be stored without compression if so desired.

6. PNG - Wikipedia

   en.wikipedia.org/wiki/PNG

   With indexed color images, the palette always stores trichromatic colors at a depth of 8 bits per channel (24 bits per palette entry). Additionally, an optional list of 8-bit alpha values for the palette entries may be included; if not included, or if shorter than the palette, the remaining palette entries are assumed to be opaque.

7. List of monochrome and RGB color formats - Wikipedia

   en.wikipedia.org/wiki/List_of_monochrome_and_RGB...

   This list of monochrome and RGB palettes includes generic repertoires of colors (color palettes) to produce black-and-white and RGB color pictures by a computer's display hardware. RGB is the most common method to produce colors for displays; so these complete RGB color repertoires have every possible combination of R-G-B triplets within any ...