An image processing apparatus 10 according to an embodiment includes a detection unit 11 and an identification unit 12. The detection unit 11 included in the image processing apparatus 10 detects a region in which a pixel value is changed between frames included in moving image data. The detection unit 11 outputs a detected result to the identification unit 12. The identification unit 12 sets a circumscribed rectangle to the region detected by the detection unit 11. The identification unit 12 specifies a frame including a detection target based on a filling ratio of the region to the circumscribed rectangle.