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US 11,934,713 B2Granted
Image forming system, inspection device, and inspection method
AssigneeRicoh Company, Ltd.
InventorTadashi Kitai
Life of this patent
Estimating the term…
Abstract
An image forming system includes circuitry. The circuitry reads an inspection target image from a printed matter. The circuitry generates a difference image between the inspection target image and a comparison target image. The circuitry performs processing on the difference image using a threshold value to perform determination as to whether a defect of the printed matter is present. The circuitry calculates a threshold value for show-through at which a show-through of the printed matter is not determined as the defect of the printed matter among multiple threshold values based on a result of the determination.
Claims7
An image forming system, comprising circuitry configured to:
- read an inspection target image from a printed matter;
- generate a difference image between the inspection target image and a comparison target image;
- perform processing on the difference image using a threshold value to perform determination as to whether a defect of the printed matter is present;
- calculate a threshold value for show-through at which a show-through of the printed matter is not determined as the defect of the printed matter among multiple threshold values based on a result of the determination;
- store lateral inversion coordinate information and vertical inversion coordinate information, based on an image to be printed on a front face of the printed matter and another image to be printed on a back face of the printed matter in order to determine the show-through, the lateral inversion coordinate information indicating a range of an image object on the printed matter when the image is laterally inverted and superimposed, the vertical inversion coordinate information indicating a range of an image object on the printed matter when the image is vertically inverted and superimposed;
- and
- calculate the threshold value for show-through by using a coordinate included in the range of the image object indicated by the lateral inversion coordinate information among coordinates determined as the defect of the printed matter in a case of duplex printing in which the image is laterally inversed and superimposed, and calculate the threshold value for show-through by using a coordinate included in the range of the image object indicated by the vertical inversion coordinate information among coordinates determined as the defect of the printed matter in a case of diplex printing in which the image is vertically inversed and superimposed.
4 more elements
An inspection device, comprising circuitry configured to:
- read an inspection target image from a printed matter:
- generate a difference image between the inspection target image and a comparison target image;
- perform processing on the difference image using a threshold value to perform determination as to whether a defect of the printed matter is present;
- calculate a threshold value for show-through at which show-through of the printed matter is not determined as the defect of the printed matter among multiple threshold values based on a result of the determination;
- store lateral inversion coordinate information and vertical inversion coordinate information, based on an image to be printed on a front face of the printed matter and another image to be printed on a back face of the printed matter in order to determine the show-through, the lateral inversion coordinate information indicating a range of an image object on the printed matter when the image is laterally inverted and superimposed, the vertical inversion coordinate information indicating a range of an image object on the printed matter when the image is vertically inverted and superimposed;
- and
- calculate the threshold value for show-through by using a coordinate included in the range of the image object indicated by the lateral inversion coordinate information among coordinates determined as the defect of the printed matter in a case of duplex printing in which the image is laterally inverted and superimposed, and calculate the threshold value for show-through by using a coordinate included in the range of the image object indicated by the vertical inversion coordinate information among coordinates determined as the defect of the printed matter in a case of duplex printing in which the image is vertically inversed and superimposed.
4 more elements
An inspection method performed by an inspection device that inspects a printed matter, the inspection method comprising:
- reading an inspection target image from the printed matter;
- generating a difference image between the inspection target image and a comparison target image;
- performing processing on the difference image using a threshold value to perform determination as to whether a defect of the printed matter is present;
- calculating a threshold value for show-through at which show-through of the printed matter is not determined as the defect of the printed matter among multiple threshold values based on a result of the determination;
- storing lateral inversion coordinate information and vertical inversion coordinate information, based on an image to be printed on a front face of the printed matter and another image to be printed on a back face of the printed matter in order to determine the show-through, the lateral inversion coordinate information indicating a range of an image object on the printed matter when the image is laterally inverted and superimposed, the vertical inversion coordinate information indicating a range of an image object on the printed matter when the image is vertically inverted and superimposed;
- and
- calculating the threshold value for show-through by using a coordinate included in the range of the image object indicated by the lateral inversion coordinate information among coordinates determined as the defect of the printed matter in a case of duplex printing, in which the image is laterally inversed and superimposed, and calculating the threshold value for show-through by using a coordinate included in the range of the image object indicated by the vertical inversion coordinate information among coordinates determined as the defect of the printed matter in a case of duplex printing in which the image is vertically inversed and superimposed.
4 more elements
Dependencies are inferred from the claim text.