Provided is an image processing method, an image processing apparatus, and the like according to which the influence of moiré can be suppressed without incurring a decrease in image resolution. An image is captured in a state in which moiré, which appears when capturing an image in-focus, has appeared, a first image is generated by removing a spatial frequency component corresponding to the moiré from the captured image using a high-pass filter, an image is captured out-of-focus by the camera, a second image is generated by applying a low-pass filter to the captured image, and a third image in which the moiré is eliminated or suppressed is generated by compositing the first image and the second image.