Patent ID: 11880155
Assignee: RICOH COMPANY, LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 6:
7. An image forming apparatus comprising circuitry configured to;
generate an image pattern in which plurality of types of patch images are combined, wherein each patch image of the plurality of types of patch images comprises image data, wherein the image data of each patch image comprises a plurality of dots, wherein each dot of the plurality of dots of the image data of each patch image has a value corresponding to white or a value corresponding to black, wherein each patch image of the plurality of patch images is used to correct or adjust operation of the image forming apparatus; and
reverse black and white of at least one type of patch image of the plurality of types of patch images when the plurality of types of patch images are combined, wherein black and white are reversed by, for each dot of the plurality of dots of the image data of the at least one type of patch image, changing a value corresponding to white to a value corresponding to black and changing a value corresponding to black to a value corresponding to white.