1. A method of determining a scene illuminant illuminating a scene of interest, said method comprising: receiving an image frame representing said scene of interest and information representing how each of a set of colors would be manifested under each of a plurality of potential illuminants, wherein said image frame contains a plurality of color values; determining a current illuminant from a plurality of illuminants by comparing only a subset of color values with said information corresponding to said plurality of illuminants for a match, wherein said subset of color values are contained in said plurality of color values; and providing said current illuminant as said scene illuminant.