Abstract: The image processing apparatus 100 acquires the image signal F1 and includes a steepening amount calculation unit 110, a contour shift amount calculation unit 120, an integration correction amount calculation 130 and an image generation unit 140, which generate a corrected image signal F9 in such a way that there is an intersection between waveforms, and that there are two regions with different areas bordered by the waveforms which overlap at the intersection point, the waveforms expressing changes in each value in image spaces displayed by the image signal and the corrected image signal respectively, when a waveform which expresses changes in the differential values of the image signal relative to the image spaces is symmetrical in a contour region of the image shown by the image signal.