IMAGE PROCESSING APPARATUS, IMAGE PROCESSING METHOD, AND COMPUTER-READABLE STORAGE MEDIUM STORING PROGRAM

An image processing apparatus comprises: a image capturing unit configured to capture an image including a region corresponding to an inside of a vehicle and a region corresponding to an outside of the vehicle; an acquisition unit configured to acquire a plurality of images captured by the image capturing unit at predetermined time intervals; a generation unit configured to generate a mask filter for masking the region corresponding to the inside of the vehicle in the image captured by the image capturing unit based on an amount of change in the plurality of images acquired by the acquisition unit; and a storage unit configured to store the mask filter generated by the generation unit.