A subject color and a non-subject color of color change operation are specified and then a first color vector representing the subject color and a second color vector representing the non-subject color are obtained. A substitute color for replacing a component of the subject color is further specified,...http://www.google.fr/patents/US5719639?utm_source=gb-gplus-shareBrevet US5719639 - Method and apparatus for changing specified color in a color image
Method and apparatus for changing specified color in a color image
