Patent ID: 8131099
Filing Date: 2012-03-06
Classification: H04N

Abstract:
1. An image processing apparatus comprising: a reading unit that reads image data stored in a memory; a distributing unit that distributes into a plurality of integrating units a plurality of the read image data corresponding to pixels in an optical black area of an image sensor in accordance with a cycle of a beat noise component; a first calculating unit that normalizes a plurality of integration values obtained by said plurality of integrating units by dividing each of the plurality of integration values by the number of integrations; a second calculating unit that subtracts a minimum value of the plurality of normalized integration values from the plurality of normalized integration values to obtain a plurality of noise data indicating the beat noise component included in the read image data; a selecting unit that selects one of the plurality of noise data which corresponds to a phase of a beat noise component included in a plurality of the read image data corresponding to pixels in an effective area of the image sensor; and a correction unit that corrects the read image data corresponding to the pixels in the effective area of the image sensor using the noise data selected by said selecting unit, wherein the image sensor outputs signals from pixels of one line in a horizontal period in accordance with a horizontal synchronization signal, and the signals output from pixels of one line is stored in the memory as the image data of one line, and said selecting unit selects one of the plurality of noise data so as to correct a phase of the beat noise component in accordance with a cycle of the horizontal synchronization signal for each horizontal period.