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2. Python Imaging Library - Wikipedia

   en.wikipedia.org/wiki/Python_Imaging_Library

   Python Imaging Library is a free and open-source additional library for the Python programming language that adds support for opening, manipulating, and saving many different image file formats. It is available for Windows, Mac OS X and Linux. The latest version of PIL is 1.1.7, was released in September 2009 and supports Python 1.5.2–2.7. [3]

3. Grayscale - Wikipedia

   en.wikipedia.org/wiki/Grayscale

   Here is an example of color channel splitting of a full RGB color image. The column at left shows the isolated color channels in natural colors, while at right there are their grayscale equivalences: Composition of RGB from three grayscale images. The reverse is also possible: to build a full-color image from their separate grayscale channels.

4. 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.

5. List of monochrome and RGB color formats - Wikipedia

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

   This is usually the maximum number of grays in ordinary monochrome systems; each image pixel occupies a single memory byte. Most scanners can capture images in 8-bit grayscale, and image file formats like TIFF and JPEG natively support this monochrome palette size. Alpha channels employed for video overlay also use (conceptually) this palette ...

6. YCbCr - Wikipedia

   en.wikipedia.org/wiki/YCbCr

   The Y′ image is essentially a greyscale copy of the main image. YCbCr, Y′CbCr, or Y Pb/Cb Pr/Cr, also written as YC B C R or Y′C B C R, is a family of color spaces used as a part of the color image pipeline in video and digital photography systems. Y′ is the luma component and C B and C R are the blue-difference and red-difference ...

7. Color balance - Wikipedia

   en.wikipedia.org/wiki/Color_balance

   where , , and are the color-balanced tristimulus values; , , and are the tristimulus values of the viewing illuminant (the white point to which the image is being transformed to conform to); ′, ′, and ′ are the tristimulus values of an object believed to be white in the un-color-balanced image, and ′, ′, and ′ are the tristimulus ...