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

Claim 16:
17. An image processing apparatus comprising:
one or more processors; and
one or more memories storing instructions that, when executed by the one or more processors, cause the one or more processors to operate as:
a first acquisition unit configured to acquire first data that is data of a reference image representing reference of inspection;
a second acquisition unit configured to acquire second data that is data of a printed image to be inspected;
a setting unit configured to set 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;
a calculation unit configured to subtract a density of the comparison areas in the reference image from a pixel value of the pixel of interest in the reference image and subtract a density of the comparison areas in the printed image from a pixel value of the pixel of interest in the printed image based on the first data and the second data; and
a processing unit configured to inspect the printed image based on a difference between results of subtracting by the calculation unit.