Color constancy method based on local chromaticity distribution and illuminant influence for hue angle

This paper proposed robust color constancy method for changing illuminant by using local chromaticity distribution and analysis of illuminant influence for each hue angle. First, changing in chromaticity distribution direction for each color with respect to various illuminant is analyzed using principal component analysis. Next, change in standard deviation of chromaticity distribution with respect to various illuminant is also analyzed. Experimental result shows that the proposed method enhances illumination estimation results in terms of angular error between real illuminant and estimated illuminant.