Image sensing apparatus, shading correction method, program, and storage medium

[0047]A preferred embodiment of the present invention will be described hereinafter with reference to the accompanying drawings.

[0048]FIG. 1 is a block diagram showing the arrangement of an image sensing apparatus (digital still camera) according to an embodiment of the present invention. This image sensing apparatus can exchange lenses.

[0049]Referring toFIG. 1, reference numeral 1 denotes a total control CPU for controlling the overall camera; 2, an exit pupil position detector; and 3, an exchangeable lens. The exchangeable lens 3 includes exit pupil position information, and the detector 2 detects the exit pupil position information included in the exchangeable lens 3, generates encode information by correcting the detected value, and outputs the generated information to the CPU 1.

[0050]The exit pupil position information is used to calculate shading correction coefficients, as will be described later. Before that calculation, the exit pupil position information is corrected accordin