Patent ID: 11928909
Assignee: DAI NIPPON PRINTING CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G

Claim 19:
20. A control method for a determination device to be used in a determination system including an imaging data acquisition device that captures an image of a printed surface of a printed product to acquire imaging data of the captured image, for determining, based on the imaging data acquired by the imaging data acquisition device, a printing method used to produce the printed surface of the printed product for which the image is captured by the imaging data acquisition device, the control method comprising,
by the determination device:
selecting a determination area included in the captured image from the imaging data acquired by the imaging data acquisition device;
extracting a determination image of a preset target color from the selected determination area;
binarizing gradation data of the target color in a plurality of pixel regions constituting the extracted determination image by using as a reference a binarization threshold suitable for each determination area to acquire binarized reference binary data of the determination image;
converting the gradation data of the target color in the plurality of pixel regions constituting the extracted determination image with respect to a dark portion of the determination image to acquire converted gradation data;
binarizing the acquired converted gradation data by using as a reference the binarization threshold to acquire comparison binary data;
acquiring, based on a comparison result obtained by comparing the reference binary data with the comparison binary data, a determination value for determining a printing method used to produce the printed surface of the printed product; and
determining, based on the acquired determination value, a printing method used to produce the printed surface of the printed product.