Patent ID: 7724950

Claim:
An image processing apparatus configured to detect an image region indicating a poor color tone of eyes, the image processing apparatus comprising: a calculation unit configured to calculate an evaluation amount with respect to the poor color tone for each pixel of an input image based on a predetermined color component; a pixel extraction unit configured to extract candidate pixels constituting an image region indicating the poor color tone based on the evaluation amount; a region extraction unit configured to extract a candidate region of a predetermined shape that includes the candidate pixels; a first determination unit configured to perform a determination relating to a characteristic amount of a peripheral region of the candidate region; an updating unit configured to update the candidate region based on a determination result obtained by the first determination unit; a second determination unit configured to perform a determination relating to an edge intensity of a peripheral region of the updated candidate region; and a detection unit configured to detect the image region indicating the poor color tone, based on a determination result obtained by the second determination unit.