Recovery of a chromaticity image free from shadows via illumination invariance

Drew, M. S., Finlayson, G. D. and Hordley, S. D. (2003) Recovery of a chromaticity image free from shadows via illumination invariance. In: IEEE workshop on color and photometric methods in computer vision (part of the 9th International Conference on Computer Vision), 2003-10-01.

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A recent method for recovering a greyscale image that is free from shadow effects is extended such that the recovered image is a colour image, in the sense that 2-dimensional chromaticity information is recovered. First, the effect of lighting change, and thus to a large degree shadowing, is removed by projecting logarithms of 2D colour band-ratio chromaticities into a direction that is independent of lighting change. The resulting 2-vector colour does not contain the contribution of the original lighting in the input image, so this is restored by considering the chromaticity for bright pixels. The resulting image is improved by regression of the chromaticity onto the original image, with promising results.

Item Type: Conference or Workshop Item (Paper)
Faculty \ School: Faculty of Science > School of Computing Sciences
UEA Research Groups: Faculty of Science > Research Groups > Interactive Graphics and Audio
Faculty of Science > Research Groups > Colour and Imaging Lab
Depositing User: Vishal Gautam
Date Deposited: 04 Jul 2011 08:05
Last Modified: 20 Jun 2023 14:33

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