Patent ID: 6903747
Filing Date: 2005-06-07
Classification: H04N

Abstract:
1. An image processing apparatus that carries out color conversion of first image data expressed by a first color system into second image data expressed by a second color system, said image processing apparatus comprising: a block information detection module that collects multiple adjoining pixels of the first image data into one block and detects block information, which is related to a tone difference between the multiple adjoining pixels in the block; a first color conversion module that certifies a level of the tone difference between the multiple adjoining pixels in the block based on the detected block information, and with regard to a block having a large tone difference level, carries out color conversion by a unit of each pixel included in the block; and a second color conversion module that, with regard to a block having a small tone difference level, carries out collective color conversion for the each adjoining pixel included in the block.