12 February 2007 Multispectral color constancy: real image tests
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Experiments using real images are conducted on a variety of color constancy algorithms (Chromagenic, Greyworld, Max RGB, and a Maloney-Wandell extension called Subspace Testing) in order to determine whether or not extending the number of channels from 3 to 6 to 9 would enhance the accuracy with which they estimate the scene illuminant color. To create the 6 and 9 channel images, filters where placed over a standard 3-channel color camera. Although some improvement is found with 6 channels, the results indicate that essentially the extra channels do not help as much as might be expected.
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Milan Mosny, Brian Funt, "Multispectral color constancy: real image tests", Proc. SPIE 6492, Human Vision and Electronic Imaging XII, 64920S (12 February 2007); doi: 10.1117/12.707273; https://doi.org/10.1117/12.707273

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