Color Constancy-gray
2016-08-23
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Color constancy is the ability to measure colors of objects independent of the color of the light source. The Grey-World assumption, which is at the basis of a well-known color constancy method, assumes that the average reflectance of surfaces in the world is achromatic. In our research we investigated the possibility of extending this simple algorithm to the higher order derivative structure of images. We propose the Grey-Edge hypothesis, which assumes that the average edge difference in a scene is achromatic. Based on this hypothesis, we derive an algorithm for illuminant color estimation. The method is easily combined together with Grey-World, max-RGB and Shades of Grey into a single framework for color constancy based on low level image features (matlab code is available).
matlab
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恒常
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