Patent ID: 11935226
Assignee: CANON KABUSHIKI KAISHA
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 14:
15. A non-transitory computer-readable storage medium storing instructions that, when executed by a computer, cause the computer to perform an image processing method comprising:
acquiring first data that is data of a reference image representing reference of inspection;
acquiring second data that is data of a printed image to be inspected;
setting a comparison area including a pixel of interest in each of the reference image and the printed image based on the first data, wherein the pixels of interest in the reference image and the printed image correspond to an identical pixel position;
calculating a density difference between the comparison areas in the reference image and the printed image based on the first data and the second data; and
inspecting the printed image based on a result of subtracting the density difference from a difference between a pixel value of the pixel of interest in the reference image and a pixel value of the pixel of interest in the print image.