From Dichromatic to Trichromatic Images
Vlad C. Cardei, "From Dichromatic to Trichromatic Images; Implications for Image Recovery and Visualization,"
Proceedings of the IS&T PICS Conference, Savanah, Georgia, 1999.
This paper explores the possibility of recovering a lost color channel from an RGB
image, based on the information present in the remaining two color channels, as well
as on a priori knowledge about the statistics of sensor responses in a given
environment. Different regression and neural network recovery methods are compared
and the results show that even simple linear techniques suffice to obtain a good
approximation of the original color channel. Remote sensing and other visualization
applications can benefit from these methods. Desaturated colors and skin tones are
faithfully restored, which is important for the compression of still images and
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Keywords: colour, colour constancy, neural networks, image recovery
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