Patent ID: 7986850

Claim:
An image processing apparatus comprising: a distributing unit that distributes into a plurality of integrating units a plurality of data obtained from output signals from 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 noise data indicating the beat noise component included in the data obtained from the image sensor; a selecting unit that selects noise data out of the noise data obtained by said second calculating unit which corresponds to a phase of a beat noise component included in a plurality of data obtained from pixels in an effective area of the image sensor; and a correction unit that corrects the data obtained from the pixels in the effective area of the image sensor using the noise data selected by said selecting unit.