Patent ID: 7605960
Filing Date: 2009-10-20
Classification: H04N

Abstract:
1. An image processing apparatus that outputs input image data to an output device, wherein the input image data is input from an input device, wherein the input device has an input brightness area that is reproducible by the input device, wherein the output device has an output brightness area narrower than the input brightness area and is reproducible by the output device, the image processing apparatus comprising: a first color conversion processing module that converts the input image data to first intermediate image data, wherein the input image data is expressed using an input device dependent color space that depends on the input device, wherein the first intermediate image data at least expresses the brightness of the input image data and is expressed by a device independent color space that does not depend on each device, a brightness conversion module that converts the first intermediate image data to second intermediate image data so that gradation of a first brightness is expressed in the output brightness area, wherein the first brightness is, of the first intermediate data, at least lower than the minimum value of the output brightness area, and a second color conversion processing module that converts the second intermediate data to output image data to output to the output device, wherein the output image data is expressed using an output device dependent color space that depends on the output device, wherein the brightness conversion module converts the first brightness to a second brightness of the second intermediate data by applying equation 1 to the first brightness L L L L