In a situation where information indicating whether or not a color is capable of being reproduced by an output device which is to output the entered image data is held by a three-dimensional LUT, information indicative of a color incapable of being reproduced is held on at least the boundary surfaces...http://www.google.com.au/patents/US6124944?utm_source=gb-gplus-sharePatent US6124944 - Image processing apparatus and method
