Patent ID: 8350951

Claim:
An image sensing apparatus comprising: a control unit that controls an optical member by using a parameter; an image sensing unit that generates image data from an object image formed via the optical member; a storage unit that stores, with respect to a plurality of setting values assumable by the parameter for controlling the optical member, correction information for correcting deterioration of image quality of image data that is caused by characteristics of the optical member and that is point asymmetrical with respect to an optical axis of the optical member, the correction information corresponding to a plurality of image heights at a plurality of polar angles in a polar coordinate system centered on the optical axis of the optical member; a reading unit that, when the control unit controls the optical member by using the parameter, reads correction information corresponding to a plurality of setting values that are close to a setting value of the parameter used by the control unit from the correction information stored in the storage unit; a conversion unit that converts a pixel position of the image data generated by the image sensing unit to polar coordinates centered on the optical axis of the optical member; a generation unit that generates correction information that corresponds to the setting value of the parameter used by the control unit and the polar coordinates converted by the conversion unit by interpolating the correction information read by the reading unit; and a correction unit that corrects the image data at the pixel position at the polar coordinates by using the correction information generated by the generation unit, wherein the storage unit stores correction information corresponding to more polar angles in a range having a greater degree of change in the deterioration of image quality in an angular direction centered on the optical axis of the optical member.