An image inspection apparatus includes a processor configured to acquire printing data that is data as a base of an image to be printed, acquire read data that is data obtained by reading the image printed on a paper sheet, specify whether or not the printing data or the read data is an image corresponding to any of an image having a periodic structural feature or an image not having a structural feature, in a case where the printing data or the read data corresponds to the image having the periodic structural feature or the image not having the structural feature, perform registration using a position correction amount that is a correction amount for registering an image based on the printing data and an image based on the read data and is calculated for an already printed image, and inspect the image by comparing the printing data with the read data.

An information processing apparatus holds a print job and identification information of a reference image that is associated with the print job and is used in inspection printing of the print job. In a case that a reprint according to the held print job is instructed, the information processing apparatus determines whether or not a change has been made in print settings of the held print job and whether or not inspection printing that uses the reference image being associated with the held print job is possible, and in a case that it is determined that the inspection printing that uses the reference image being associated with the held print job is not possible, controls so as to set the identification information of the reference image in the held print job to none and transmits the held print job to the printing apparatus.

An image inspection apparatus includes a processor configured to acquire printing data that is data as a base of an image to be printed, acquire read data that is data obtained by reading the image printed on a paper sheet, specify whether or not the printing data or the read data is an image corresponding to any of an image having a periodic structural feature or an image not having a structural feature, in a case where the printing data or the read data corresponds to the image having the periodic structural feature or the image not having the structural feature, perform registration using a position correction amount that is a correction amount for registering an image based on the printing data and an image based on the read data and is calculated for an already printed image, and inspect the image by comparing the printing data with the read data.

An image forming apparatus comprises a reading unit that reads a document sheet, specifies image data of a comparison source document sheet, among image data of document sheets read by the reading unit; extracts a difference by comparing the image data of the specified comparison source document sheet, and image data of each of other document sheets included in the read document sheets; and creates a composite image by composing the extracted difference and the image data of the comparison source document sheet.

An image inspection device includes a hardware processor executing an inspection for a first read image generated by reading a first sheet on which one image is formed, based on a reference image. When an operation for newly generating the reference image is performed in association with the inspection for the first read image, the hardware processor acquires second read images generated by respectively reading second sheets on each of which the one image is formed and generates the reference image using the inspection for the first read image. When an operation for using the generated reference image stored in a storage unit is performed in association with the inspection for the first read image, the hardware processor uses the reference image in the storage unit for the inspection for the first read image, without newly acquiring the second read images.

Techniques for interactively determining/visualizing the color content of a source image and how the corresponding image data is mapped to device colors are described herein. For example, the color content of a digital image can be converted between different color spaces to identify gamut limitations of an output device (e.g., a printing assembly), discover color(s) that cannot be accurately reproduced, etc. Color space conversions enable the transformation of the color content of the digital image from device-specific colorants to a device-independent representation (and vice versa). In some embodiments, these transformations are facilitated using lookup tables that are implemented in graphical processing unit-resident memory.

An image forming apparatus is configured to communicate with an external controller configured to generate a job, and includes one or more controllers having one or more processors and one or more memories, the one or more controllers being configured to acquire an image from a first job upon receiving the first job from the external controller and register a reference image generated from the image, to execute inspection processing upon receiving a second job from the external controller, and to perform control to delete the reference image registered upon receiving a cancellation instruction to cancel the second job from the external controller.

There is provided with an information processing apparatus. A first obtaining unit obtains data of a reference image indicating a target of printing output to be performed by a printing apparatus. A second obtaining unit obtains data of an image printed by the printing apparatus. A correcting unit corrects a local image density difference or the reference image based on a global image density difference between the reference image and the printed image. An evaluating unit evaluates quality of the printed image based on the local image density difference between the corrected reference image and the printed image.

A first surface of a first sheet has a second image formed in advance. An image forming system generates reference data based on a result of reading an image on the first surface of the first sheet on which a first image is not formed, generates first image data that represents a result of reading an image on the first surface of the first sheet having the first image formed on the first surface, and determines, based on the reference data and the first image data, a relative position between the first image and the second image on the first surface of the first sheet.

An image evaluation device includes: a reading unit that reads a sample image included in a sample printout recognized as a non-defective printout and that reads an inspection object image included in an inspection object printout obtained by printing an image corresponding to the sample image on a recording medium using a printing device based on image data representing the image; an extraction unit that extracts a line defect including a linear pattern formed in a specific direction from the inspection object image represented by inspection object image data, based on a difference value between sample image data obtained by reading the sample image and the inspection object image data; and an evaluation unit that evaluates a visibility of the line defect extracted by the extraction unit.