Character defect detection method and device

A character defect detection device, comprising:

• an acquisition module for acquiring an image to be inspected containing a character and a template character image corresponding to the character, and converting the image to be inspected into an image having a format consistent with a format of the template character image;
• an extraction module for extracting a first valid area containing the character from the image to be inspected, and extracting a second valid area containing a template character from the template character image;
• a determining module for obtaining a first image based on the first valid area, and obtaining a second image based on the second valid area;
• a transformation module for calculating a transformed image indicating an information difference between the first image and the second image based on the first image and the second image;
• and
• a detection module for obtaining a character defect detection result of the image to be inspected based on information of the transformed image.

A computer readable storage medium storing a computer program, wherein the computer program causes a computer to execute the following method:

• acquiring an image to be inspected containing a character and a template character image corresponding to the character, and converting the image to be inspected into an image having a format consistent with a format of the template character image;
• extracting a first valid area containing the character from the image to be inspected, and extracting a second valid area containing a template character from the template character image;
• obtaining a first image based on the first valid area, and obtaining a second image based on the second valid area;
• calculating a transformed image indicating an information difference between the first image and the second image based on the first image and the second image;
• and
• obtaining a character defect detection result of the image to be inspected based on information of the transformed image.