Patent ID: 11880969
Assignee: KYOCERA DOCUMENT SOLUTIONS INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 5:
6. A computer-readable non-transitory recording medium having stored thereon a belt examination program causing a computer to implement a defect candidate detecting processor that detects a candidate for a belt defect that is an abnormal portion of an intermediate transfer belt of an image forming apparatus from a belt image that is an image of the intermediate transfer belt, wherein
the defect candidate detecting processor
executes a background pattern reduction step to reduce a texture-pattern like background noise present in the belt image, and
detects the candidate based on the belt image generated during the background pattern reduction step,

the background pattern reduction step is to execute a locally adaptive binarization process on the belt image in a range having a specific size based on a typical size of the belt defect to generate a binary image and subtract the binary image from the belt image,
the binary image includes a first value into which a lowest color value of the belt defect is converted and a second value larger than the first value, and
the second value is obtained by dividing in half a difference between a color value in a specific lower quantile of the belt image and a color value in a specific upper quantile of the belt image.