An image reading apparatus connectable to a post-processing apparatus includes an image reading unit for transmitting image data to an inspection processing unit, and a communication unit for outputting a sheet discharge timing signal to the post-processing apparatus through a signal line. The communication unit outputs the sheet discharge timing signal having different waveforms to the post-processing apparatus on the basis of an inspection result of a sheet obtained from the inspection processing unit such that the sheet discharge timing signal includes a first waveform when the sheet determined by the inspection processing unit as that there is no image abnormality is discharged and such that the sheet discharge timing signal includes a second waveform different from the first waveform when the sheet determined by the inspection processing unit as that the image abnormality occurs is discharged.

An image reading apparatus includes an original tray on which an original is to be stacked; a conveyance unit configured to convey the original stacked on the original tray; a reading unit including a reading sensor having a light receiving element to receive light of a first color and a light receiving element to receive light of a second color that is different from the first color, wherein the reading unit is configured to read an image of the original conveyed by the conveyance unit by using the reading sensor to generate image data which represents a reading result of the reading unit; at least one processor configured to: determine a first abnormal position which is a position in a first direction of an abnormal pixel of the first color in the image represented by the image data, wherein, in the image represented by the image data.

An image forming apparatus includes a forming unit, a generation unit, a storage unit, a correction unit, and a changing unit. The forming unit forms an image. The generation unit generates correction data for correcting density unevenness for each of a plurality of regions divided in a main scanning direction of an image formed by the forming unit. The storage unit stores the correction data generated by the generation unit. The correction unit corrects a density of an image to be formed by the forming unit for each of the plurality of regions based on the correction data stored by the storage unit. The changing unit changes an image formation density by the forming unit with a uniform amount of change for the plurality of regions after the correction data is generated by the generation unit.

An image forming apparatus is provided. The apparatus comprises an image forming unit to form an image based on an image forming condition and a controller. The controller determines information related to a density of an image to be formed by the image forming unit; generates the image forming condition based on the information; acquires measurement data outputted from a sensor related to a test image; determines, based on a first determination condition, first information related to a density of the test image; determines, based on a first determination condition, second information related to a density of the test image; and selects the determination condition from among a plurality of determination conditions including the first determination condition and the second determination condition.

The present invention provides an in-line printing system including a printing apparatus and an inspection apparatus for inspecting a product outputted by the printing apparatus. In addition, the printing apparatus sequentially assigns page information to each page of the product outputted by the printing module, assigns additional information indicating an additional page inserted by the printing module, and sequentially notifies the inspection apparatus of the page information and the additional information. The inspection apparatus receives the notified page information and additional information, compares the page information and the additional information, and performs inspection by comparing a printed material according to the inspection job excluding the additional page from the product based on a comparison result and pre-registered correct images corresponding to respective pages of the printed material.

A print system including a printing apparatus and an inspection apparatus, the printing apparatus obtains, from a print job, image data to be used for printing, registers in the inspection apparatus the image data as a reference image, in response to completion of registration of the reference image in the inspection apparatus, executes printing on a sheet based on the print job, and notifies the inspection apparatus of an instruction for inspecting the sheet on which printing has been performed. The inspection apparatus registers the image data received from the printing apparatus as the reference image, and in response to the instruction for inspecting, inspects the sheet on which the printing has been performed in the printing apparatus.

An apparatus including: a forming unit configured to form a measurement image on a sheet; a fixing unit configured to fix the measurement image; a measurement unit provided downstream of the fixing unit in a sheet conveyance direction and configured to measure a color of the fixed measurement image; a detector configured to detect whether a cooling device having a cooling function valid is connected between the fixing unit and the measurement unit; and a controller configured to determine, in a case in which the color of the measurement image is measured, a time to be taken after the sheet has passed through the fixing unit until the measurement unit starts measuring the color of the measurement image based on a result of the detector, and to control sheet conveyance based on the determined time.

A CNN of an image forming apparatus includes: an encoder which compresses, for each tile image obtained by dividing an image into specific size pieces, information of the tile image; a decoder which restores the information of the tile image compressed by the encoder; and a blank sheet determination portion which determines whether the tile image corresponds to a blank sheet image. A segmentation image generation portion uses, when the blank sheet determination portion determines the tile image as being the blank sheet image, the blank sheet image for an image of a part corresponding to the tile image in a segmentation image, and uses, when the blank sheet determination portion determines the tile image as not being the blank sheet image, an output image of the decoder for an image of a part corresponding to the tile image in the segmentation image.

An information processing apparatus is communicably connected to one or more image forming apparatuses each including: an image forming device that forms an image on a recording medium; an image reading device that reads the image to obtain read image data; and an image forming controller that executes a first inspection and detects in the read image data an image defect corresponding to a predetermined inspection item at a first cycle, the information processing apparatus including: a processing controller that: acquires inspection source data based on the read image data obtained from at least one of the image forming apparatuses, and executes a second inspection to inspect the inspection source data.

An apparatus includes an output unit configured to output a printed material of a verification image in a case where a condition is satisfied, an obtainment unit configured to obtain a verification result based on a comparison between a read image of the printed material of the verification image and a correct answer image, and a control unit configured to control printing based on the verification result.