1. An object recognition apparatus, including: an input unit which inputs at least two images that contain a captured position where an object is possibly present; a division unit which partitions each of the at least two images into a plurality of regions; a calculation unit which derives, for each of the plurality of regions partitioned by said division unit, a characteristic quantity of the region based on a pixel value of each pixel within the region; a comparison unit which compares the characteristic quantities derived by said calculation unit between the at least two images, for the each of the plurality of regions; and a recognition unit which recognizes a region where the object is located, based on a comparison result by said comparison unit for the each region.