Illumination source chromaticity estimation based on spherical co-ordinates in RGB

Spherical co-ordinates in the RGB colour space provide direct chromatic information. Proposed is a novel method that uses this information for illumination source chromaticity (ISC) estimation. The method has been tested on synthetic images, the ISC of which is known. This allows a quantitative comparison with a state-of-the-art algorithm. The proposed algorithm is an improvement over the competing algorithm.