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2. Image color transfer - Wikipedia

   en.wikipedia.org/wiki/Image_color_transfer

   The image modification process is sometimes called color transfer or, when grayscale images are involved, brightness transfer function (BTF); it may also be called photometric camera calibration or radiometric camera calibration. The term image color transfer is a bit of a misnomer since most common algorithms transfer both color and shading ...

3. File:Channel digital image CMYK color.jpg - Wikipedia

   en.wikipedia.org/wiki/File:Channel_digital_image...

   Sample image for the article "Channel (digital image)" -- this is a YCCK (APP14 Adobe marker with transform 2 signals YCCK color space [1]) image, some browsers might not render it correctly, please do not delete on sight!

4. Grayscale - Wikipedia

   en.wikipedia.org/wiki/Grayscale

   For example, RGB images are composed of three independent channels for red, green and blue primary color components; CMYK images have four channels for cyan, magenta, yellow and black ink plates, etc. Here is an example of color channel splitting of a full RGB color image.

5. Channel (digital image) - Wikipedia

   en.wikipedia.org/wiki/Channel_(digital_image)

   A 32-bit CMYK image (the industry standard as of 2005) is made of four 8-bit channels, one for cyan, one for magenta, one for yellow, and one for key color (typically is black). 64-bit storage for CMYK images (16-bit per channel) is not common, since CMYK is usually device-dependent, whereas RGB is the generic standard for device-independent ...

6. Chroma subsampling - Wikipedia

   en.wikipedia.org/wiki/Chroma_subsampling

   The human vision system (HVS) processes color information (hue and colorfulness) at about a third of the resolution of luminance (lightness/darkness information in an image). Therefore it is possible to sample color information at a lower resolution while maintaining good image quality.

7. 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.