Patent ID: 7916943

Claim:
An image determining apparatus comprising: (A) a histogram data generation section that, based on data of pixels constituting an image to be determined, generates data of histograms for each color, the histograms representing a distribution of the number of pixels with respect to density values of each color of those pixels; (B) an attribute information obtaining section that obtains, for each color, attribute information relating to a first small region and a second small region by partitioning regions represented by the histograms for each color into at least three small regions each, according to the magnitude of the density values, based on the data of the histograms for each color generated by the histogram data generation section, selecting, for each color, as the first small region, a small region whose density values are larger than those of at least one of the at least three small regions and whose density values are smaller than those of at least one other of the at least three small regions, and selecting, for each color, at least one small region other than the first small region as the second small region; and (C) a determining section that determines whether the image to be determined is an image in which the color balance of the first small region is destroyed, based on the attribute information relating to the first small region for each color and the attribute information relating to the second small region for each color, that have been obtained by the attribute information obtaining section.