Face-based Chromatic Adaptation for Tagged Photo Collections

Colour constancy is the phenomenon where the chromaticity of a surface material appears to remain constant to an observer under different illuminants. Studies have shown human vision exhibits colour constancy to varying degrees. Digital camera sensors completely lack this property, resulting in pictures with unsightly colour casts. This paper presents a method for semi-automatically removing colour casts due to the incorrect application of in-camera white balance settings. Correction is done in a perceptually uniform opponent colour space derived from the Munsell colour system. CR Categories: I.2.10 [Artificial Intelligence]: Vision and Scene Understanding—Intensity, color, photometry, and thresholding; I.4.8 [Image Processing and Computer Vision]: Scene Analysis— Color;