Transforms a color image to a grayscale image. It is a basic tool in digital printing, stylized black-and-white photograph rendering, and in many single channel image processing applications [CL12].
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This function is to be applied on color images.
[CL12] | Cewu Lu, Li Xu, Jiaya Jia, “Contrast Preserving Decolorization”, IEEE International Conference on Computational Photography (ICCP), 2012. |