Patent ID: 7885532

Claim:
An image sensing apparatus capable of sensing an image with flashing a flash unit, comprising: an image sensing unit configured to sense an image and obtain image data of the image; a determination unit configured to determine a first region in the image where a subject that satisfies a predetermined condition exists based on image data obtained by the image sensing unit without flashing the flash unit; wherein the determination unit further determines a second region in the image where a subject that satisfies a predetermined condition exists based on image data obtained by the image sensing unit with flashing the flashing unit, and a calculation unit configured to calculate a flash illumination amount for the flash unit based on a comparison result between a first proportion that is a proportion of the subject in the first region of image data obtained by the image sensing unit without flashing the flash unit and a second proportion that is a proportion of the subject in the first region of image data obtained by the image sensing unit with flashing the flash unit, wherein in a case where a degree of convergence between the first proportion and the second proportion is less than a first threshold, the calculation unit calculates the flash illumination amount for the flash unit based on luminance of the second region.