Determination device, control method for determination device, determination system, control method for determination system, and program

A control method for 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, and
• a determination device that determines, 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.

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, wherein the determination device

• selects a determination area included in the captured image from the imaging data acquired by the imaging data acquisition device,
• extracts a determination image of a preset target color from the selected determination area,
• binarizes 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,
• converts 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,
• binarizes the acquired converted gradation data by using as a reference the binarization threshold to acquire comparison binary data,
• acquires, 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
• determines, based on the acquired determination value, a printing method used to produce the printed surface of the printed product.

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.