Color normalization using interest points
Publication Date: 2003-Sep-03
The IP.com Prior Art Database
Problem Solved: Color constancy / color correction / color normalization / white balance for natural scene images. Color invariant recognition or indexing of such images. Novelty: To estimate an effective illuminant we employ only colors at certain interest points determined from a grayscale image, rather than the entire set of observed pixel colors. Benefits: The proposed method gives a more robust estimation of effective illuminant than competing techniques. In particular, more robust to the effects of changes of viewpoint, surface fluorescence, surface inter-reflections. This leads to more accurate color correction, indexing and recognition performance. The method is sufficiently simple to be incorporated in a camera.