Image processing method and image processing apparatus for executing image processing method

An image processing method of capturing a display image of a display panel in which pixels are aligned periodically using a camera in which imaging pixels are aligned periodically, and processing the image captured by the camera, comprising:

• an in-focus image capturing step of capturing the display image in-focus using the camera;
• a first image generation step of generating a first image by applying a high-pass filter to the image captured in the in-focus image capturing step and removing or reducing a spatial frequency component corresponding to moiré that appears in the captured image;
• an out-of-focus image capturing step of capturing the display image out-of-focus using the camera;
• a second image generation step of generating a second image by applying a low-pass filter to the image captured in the out-of-focus image capturing step;
• and
• a third image generation step of generating a third image in which the moiré is eliminated or suppressed, by compositing the first image and the second image.