Inspection apparatus, inspection method, and storage medium that provide position adjustment by at least one of linear transformation or non-linear transformation of inspection image
AssigneeCanon Kabushiki Kaisha
InventorRiko Miura
Life of this patent
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Abstract
The occurrence of an erroneous inspection is suppressed by preventing a failure of position adjustment by non-linear transformation. In position adjustment between an inspection image obtained by reading a printed material and a reference image, after performing position adjustment by linear transformation, only in a case where a certain condition is satisfied, position adjustment by non-linear transformation is further performed for the inspection image for which the position adjustment by linear transformation has been performed.
Claims8
An inspection apparatus for inspecting a printed material that is output from a printing apparatus, the inspection apparatus comprising:
- one or more memories storing instructions;
- and
- one or more processors executing the instructions to perform position adjustment, between an inspection image generated by reading an image printed on a sheet and a reference image that is used as a reference in the inspection, wherein in performing the position adjustment, the one or more processors:
- performs a linear transformation for the inspection image;
- determines whether a type of the reference image is a first type or a second type, wherein:
- the first type is where an image as the reference image is included in image data of a print job;
- and
- the second type is where an image as the reference image is obtained by reading a sheet having no print defect;
- and
- performs a linear transformation for the inspection image that has been performed with the linear transformation, in a state where the type of the reference image has been determined to be the first type.
An inspection method of inspecting a printed material that is output from a printing apparatus, the inspection method comprising the step of:
- performing position adjustment, between an inspection image generated by reading an image printed on a sheet and a reference image that is used as a reference in the inspection, by:
- performing a linear transformation for the inspection image;
- determining whether a type of the reference image is a first type or a second type, wherein:
- the first type is where an image as the reference image is included in image data of a print job;
- and
- the second type is where an image as the reference image is obtained by reading a sheet having no print defect;
- and
- performing a non-linear transformation for the inspection image that has been performed with the linear transformation, in a state where the type of the reference image has been determined to be the first type.
A non-transitory computer readable storage medium storing a program executable by a computer to perform an inspection method of inspecting a printed material that is output from a printing apparatus, the inspection method comprising the step of:
- performing position adjustment, between an inspection image generated by reading an image printed on a sheet and a reference image that is used as a reference in the inspection, by:
- performing a linear transformation for the inspection image;
- determining whether a type of the reference image is a first type or a second type, wherein:
- the first type is where an image as the reference image is included in image data of a print job;
- and
- the second type is where an image as the reference image is obtained by reading a sheet having no print defect;
- and
- performing a non-linear transformation for the inspection image that has been performed with the linear transformation, in a state where the type of the reference image has been determined to be the first type.
Dependencies are inferred from the claim text.