Patent ID: 6522427
Filing Date: 2003-02-18
Classification: G06F,H04N

Abstract:
An image processing apparatus for improving a color space transformation between an input device and an output device, comprising:an input device that receives a plurality of sample images; a first three-dimensional look up table that receives sample image colors representing said sample images from said input device and transforms said sample image colors, which are specified in an input device color space, into sample image colors in a device-independent color space; a second three-dimensional look up table that receives said sample image colors in a device-independent color space from said first three-dimensional look up table and transforms said sample image colors in a device-independent color space into sample image colors in an output device color space; an output device that receives said sample image colors in said output device color space and outputs said sample images; a marking unit for identifying regions of sample images where contouring appears when said sample images are output from said output device; a list of colors corresponding to said identified regions; a set of nodes in said second three-dimensional look up table that encompass said list of colors; and a filter that smoothes said set of nodes in said second three-dimensional look up table.