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Colorizing an Image
A simple algorithm for colorizing a grayscale image works by propagating the color based on the difference of the luminance values of pixels. Choose a color, drag across the image, and click the Colorize button.



"Colorizing an Image" from The Wolfram Demonstrations Project
 http://demonstrations.wolfram.com/ColorizingAnImage/
Contributed by: Maxim Rytin
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