Embodiments of the present disclosure provide an image calibration method, an image forming apparatus, and a storage medium. The method includes outputting a calibration image in response to a calibration instruction, where the calibration image includes a calibration pattern and a calibration mark; according to the calibration mark of the calibration image, determining whether a calibration event corresponding to the calibration image matches a calibration event corresponding to a current calibration operation, or determining whether a calibration event type corresponding to the calibration image matches a calibration event type corresponding to a current calibration operation; and performing image calibration according to the calibration pattern in the calibration image if the calibration event corresponding to the calibration image matches the calibration event corresponding to the current calibration operation, or if the calibration event type corresponding to the calibration image matches the calibration event type corresponding to the current calibration operation.

A print control system is provided. The system comprises an image forming unit to form an image onto a sheet; an image reader to read an image of the sheet; an inspection unit to inspect a quality by comparing the image read by the image reader with a reference image. The system forms an image by the image forming unit using a first print setting defined in advance when registering the reference image, registers, as the reference image, an image read by the reading unit, and forms an image by the image forming unit using a second print setting defined in advance when manufacturing a print product.

An image forming apparatus includes an image forming portion, a transfer unit, a power supply, and a reader. A test chart is formed by transferring test images to a recording material while applying test voltages from the power supply to the transfer unit. A transfer voltage to be applied to the transfer unit during transfer is set based on the read test images. A reference image is formed on the test chart. The reader reads the test chart by scanning the test chart from a first position to a second position that falls within the test images. The first position falls within a boundary of the recording material on which the test chart is formed and falls outside the test images. Based on the reference image, the result of the reader reading the test chart is obtained by scanning the test chart from the first position to the second position.

An inspection system includes: an inspection part that compares a scanned image obtained by scanning a sheet on which an image is formed on the basis of a job with a reference image prepared in advance and thereby performs inspection of the scanned image; and a hardware processor that sets an inspection target page to be a target of inspection and a non-inspection target page to be excluded from inspection, for the job, wherein the hardware processor causes the inspection part to perform inspection for the inspection target page and not to perform inspection for the non-inspection target page on the basis of the setting of the hardware processor, and the hardware processor creates an inspection report including scanned images of all pages of the job including the non-inspection target page.

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 includes a light scanning device, a developing portion, a control portion and a storage portion. An evaluation chart includes a first evaluation pattern and a second evaluation pattern. The first evaluation pattern includes a first patch row. The first patch row is formed by arranging a plurality of first evaluation patches. The first evaluation patch includes a first dot row and a second dot row. The second evaluation pattern includes a second patch row. The second patch row is formed by arranging a plurality of second evaluation patches.

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.

In an image forming apparatus, a recording head ejects ink corresponding to an image to be printed, using arranged nozzles. A control unit determines nozzles corresponding to the image to be printed, correspondingly to a position of a print sheet, and causes the recording head to eject ink from the nozzles. A correction processing performs a correction process corresponding to each of ink ejection malfunction positions in the image. Further, the correction processing unit (a) sets the ink ejection malfunction positions as targets of the correction process in advance, and (b) excludes from the targets on the basis of a sheet size of the print sheet an ink ejection malfunction position corresponding to a nozzle that is not used for the print sheet among nozzles corresponding to the plural ink ejection malfunction positions and thereafter performs the correction process for the targets.

An inspection device includes a reader including a light source and a light receiving element, a white reference section, a memory storing reference data of a white pixel value, and a controller. The controller is configured to cause the light source to emit light toward the white reference section, and receive a pixel signal output from the reader when the light receiving element receives reflected light from the white reference section, determine a rate of decrease in a pixel value relative to the reference data, based on the received pixel signal, when the rate of decrease is equal to or higher than a first threshold, output an instruction signal concerning an instruction to clean the reader, re-determine the rate of decrease in response to receiving input of a completion signal concerning completion of cleaning of the reader, and update the reference data using the re-determined rate of decrease.

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.