Patent ID: 8421880
Filing Date: 2013-04-16
Classification: H04N

Abstract:
1. An image processing apparatus comprising: a difference calculation unit that calculates a difference value indicating a difference between a feature amount of a predetermined region of a frame of image data taken by and output by an image capturing unit capturing a subject and a feature amount of the predetermined region of a past frame relative to the frame of the image data; a first counting unit that counts number of times when an absolute value of the difference value calculated by the difference value calculation unit exceeds a threshold during a predetermined period of time; a second counting unit that counts number of times when the difference value calculated by the difference value calculation unit on a present frame of the image data and the difference value calculated by the difference value calculation unit on a past frame of the image data have different plus-minus signs from each other during a predetermined period of time; and an identification unit that compares the number of times counted by the second counting unit with a predetermined value when the number of times counted by the first counting unit exceeds a predetermined value, and based on a comparison result thus obtained, identifies a light source frequency of a light source under which the subject is captured.