Color image processing system based on color/brightness constancy

This paper suggests a new color image processing system based on the human visual system. In human visual system, the brightness and chromaticity are processed independently. Thus, in the proposed system, first, the color signal is divided into brightness and chromaticity. Next, the brightness and chromaticity are processed in parallel. Arbitrary color image processing methods can be applied to the proposed system. We show a concrete processing procedure based on the constancy by using the proposed system. That is to say, the automatic white balance which is simulated color constancy and the retinex which is simulated brightness constancy are performed in the proposed system. We make clear that high quality color enhancement images can be obtained by the proposed system through the processing results.