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

Claim 2:
3. The belt examination system according to claim 1, wherein
the defect candidate detecting processor performs an inclination angle specifying process to
temporarily shear and deform the belt image at a temporary correction angle,
calculate either an average value or a sum of color values in each line of the temporarily sheared and deformed belt image,
calculate any of a difference value between a maximum value and a minimum value, a variance, and a standard deviation of either the average value or the sum calculated in all the lines of the belt image, and
specify the temporary correction angle at which any of the difference value between the maximum value and the minimum value, the variance, and the standard deviation has a maximum among the temporary correction angles as an inclination angle of a portion of the intermediate transfer belt in the belt image,

the defect candidate detecting processor executes shear deformation on the belt image in accordance with the inclination angle specified during the inclination angle specifying process, and
before the background pattern reduction step, the defect candidate detecting processor subtracts an average value of color values in each line from a color value of each pixel in the line among all the lines of the belt image having undergone the shear deformation in accordance with the inclination angle.