Estimating the color of the illuminant under which an image of a scene was captured is a central part of solving the color constancy problem: that is of deriving an illuminant independent representation of the reflectance's in a scene. In this article we develop a general correlation framework for solving the illuminant estimation problem. Within this framework estimation is posed as a correlation of the colors in an image with the colors that can occur under each of a set of possible lights.
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