Patent ID: 8120663

Claim:
An image sensing apparatus comprising: an image sensor that converts an image formed by an optical system into electrical signals at each of a plurality of pixels; a driving unit that drives the image sensor so as to output the electrical signals through a plurality of readout modes including at least a full pixel readout mode that reads out respective electrical signals from all of the plurality of pixels and a thinning readout mode that reads out respective electrical signals from pixels that exclude at least a portion of the pixels of the plurality of pixels; an acquisition unit that acquires optical system magnification chromatic aberration correction information; a correction coefficient calculation unit that, using the acquired magnification chromatic aberration correction information, obtains a coefficient for a first magnification chromatic aberration correction method in a case in which the electrical signals are read out using the full pixel readout mode, and obtains a coefficient for a second magnification chromatic aberration correction method in a case in which the electrical signals are read out using the thinning readout mode; and a chromatic aberration correction unit that corrects the electrical signals using a coefficient obtained by the correction coefficient calculation unit, wherein, in the first magnification chromatic aberration correction method, the read-out electrical signals are corrected based on pixel positions that the electrical signals indicate, and in the second magnification chromatic aberration correction method, the thinned and read-out electrical signals are corrected based on positions in the image sensor of pixels that correspond to the electrical signals.