An image processing apparatus includes an intermediate image generating unit configured to input an image which has been shot with differing exposure times set by region, generates a plurality of exposure pattern images corresponding to differing exposure times based on the input image, and generates a plurality of timing images which are difference images of the plurality of exposure pattern images; and a distortion correction processing unit configured to generate a corrected image equivalent to an exposure processing image at a predetermined exposure time by synthesizing processing of the plurality of timing images.