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Color Image | CIE Y | Decolorized Image (Chrominance contrast is preserved) |
Abstract
Decolorization - the process to transform a color image to a grayscale one - is a basic tool in digital printing, stylized black-and-white photography, and in many single channel image processing applications.
We propose an optimization approach aiming at maximally preserving the original color contrast. Our main contribution is to alleviate a strict order constraint for color mapping based on human vision system, which enables the employment of a bimodal distribution to constrain spatial pixel difference and allows for automatic selection of suitable gray scale in order to preserve the original contrast.
Downloads
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"Contrast Preserving Decolorization" Cewu Lu, Li Xu, Jiaya Jia IEEE International Conference on Computational Photography (ICCP), 2012 ![]() ![]() ![]() ![]() |
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"Contrast Preserving Decolorization with Perception-Based Quality Metrics" Cewu Lu, Li Xu, Jiaya Jia International Journal of Computer Vision (IJCV), 2014 ![]() ![]() ![]() |
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Examples and Comparison
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Color Image | CIE Y | Decolorized Image (Chrominance contrast is preserved) |