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| Function: | im.matrix.tint | (r, g, b): |
Constructs an im.matrix that tints an image, while leaving the alpha channel intact. r, g, and b, should be numbers between 0 and 1, and control what fraction of the given channel is placed into the final image. (For example, if r is .5, and a pixel has a red component of 100, the corresponding pixel will have a red component of 50.)