Patent ID: 6028646
Filing Date: 2000-02-22
Classification: H04N

Abstract:
A color image enhancement device comprising:an RGB (red, green, blue)/saturation conversion section for obtaining a saturation of an image of an RGB color model;a saturation enhancement section for emphasizing a high frequency band of the saturation outputted from the RGB/saturation conversion section to enhance the saturation;a minimum primary color determining section for determining which primary color signal among normalized RGB primary color signals outputted from the saturation enhancement section has a minimum value, based on a minimum primary color signal used in the RGB/saturation conversion section, and providing a corresponding switching control signal;a switch for switching an output of the saturation enhancement section through one of three paths in accordance with the switching control signal provided from the minimum primary color determining section; anda saturation/RGB conversion section for converting an output of the saturation enhancement section inputted through the switch into enhanced color signals.