An object of the present invention is to eliminate instability in processing results of either one of image restoration processing, image feature extraction processing, and image matching processing, which is caused depending on an image division method, to enhance identification accuracy in image matching. An image processing apparatus includes an image input section, a data processing section, and a result output section. The data processing section includes a controller, an image-dividing-method dictionary, an image division section, an image processing section and an image integration section. The image division section divides image data into a plurality of regions according to a plurality of image dividing methods set in advance in the image-dividing-method dictionary. The image processing section processes the image data divided according to the image dividing methods by the image division section and generates a plurality of restored image data. The image integration section generates integrated image data of the entire image by using the plurality of the restored image data obtained from the processing that the image division section and image processing section perform according to the plurality of the image division methods.