Patent ID: 6330075
Filing Date: 2001-12-11
Classification: H04N

Abstract:
An image processing method comprising:an input step of entering input color data of a plurality of color components in input color space;a step of producing limited data by limiting data, which comprises the data of the plurality of color components, to data that is expressed in the input color space;a quantization step of quantizing the limited data of each of the plurality of color components to data having a level lower than an input level;a generation step of generating output color data of a plurality of output color components, which is mapped into the input color space, by a table conversion, from the quantized data;a step of obtaining color reproduction error between the input color data and the output color data by converting colors, which are expressed by the data of the plurality of output color components, to data in the input color space; anda first error correction step of correcting the obtained color reproduction error,wherein said step of obtaining color reproduction error includes obtaining the color reproduction error between the input color data and the output color data to correct a quantization error produced with the quantization in said quantization step and a conversion error generated by the table conversion.