Patent ID: 8179576
Filing Date: 2012-05-15
Classification: H04N

Abstract:
1. An image processing apparatus comprising: a color correction unit that performs a conversion of a gradation-converted image signal obtained by using a gradation conversion table of an image-signal conversion unit that performs a gradation conversion of an input image signal from an image reading unit that optically reads an image of an original document, and corrects a color of the gradation-converted image signal based on image processing parameters according to a plurality of hue areas formed by boundary surfaces formed in parallel to a brightness axis in a color space; a reference data storing unit that stores therein reference data corresponding to patches in a reference chart including a plurality of achromatic patches with different gradation levels and a plurality of chromatic patches with different hues; a correction parameter generating unit that generates the image processing parameters, based on the reference data and values of the reference chart obtained by the image reading unit reading the reference chart, and intermediate calculation results; an intermediate result storing unit that stores the intermediate calculation results calculated at each predetermined operation in a stepwise manner in a memory; and a determination information storing unit that stores therein recalculation determination information for determining whether to recalculate the intermediate calculation results, wherein the intermediate result storing unit recalculates the intermediate calculation results based on the recalculation determination information.