An image processing method of processing an image obtained by using an optical system having a wide field angle and a large magnification chromatic aberration includes the steps of applying magnification chromatic aberration correction processing to the image, applying separation processing to the image after the step of applying the magnification chromatic aberration correction for separating the image into a brightness signal and a color signal, and applying a high band emphasis processing only to the brightness signal after the step of applying the separation processing.