An image forming apparatus includes a setting unit configured to set an operation mode, and a processing unit configured to perform image processing on image data according to the operation mode. In a case when a first mode is set, the image processing includes determining, in the image data, one or more target pixels having a gradation value equal to or higher than a first threshold value, and one or more adjacent pixels that are different from the one or more target pixels and adjacent to the one or more target pixels, setting a first gradation value lower than the first threshold value as a gradation value of the one or more target pixels, and setting a second gradation value higher than the first gradation value as a gradation value of the one or more adjacent pixels.

The image forming apparatus according to an embodiment of the present invention includes: an authentication unit configured to perform authentication of a user; and a job management unit configured to perform printing processing by executing a saved print job, and in the case where the user is authenticated by the authentication unit, the job management unit executes a print job for which a first printing method is specified of print jobs associated with the user without receiving a selection by the user and executes a print job for which a second printing method is specified of print jobs associated with the user by receiving a selection by the user.

In a printer, when a storage print job is a print job for execution of carbon-copy printing, a controller performs: creating a plurality of bit map data by rasterizing page-description-language data contained in the storage print job a plurality of times; storing the created bit map data; and controlling an image former to print images based on the stored bit map data when a print instruction for the storage print job is received. When the storage print job is a print job not for execution of the carbon-copy printing, the controller performs: storing the page-description-language data contained in the storage print job; when the print instruction for the storage print job is received, rasterizing the stored page-description-language data to create bit map data; and controlling the image former to print an image based on the created bit map data.

A system in an embodiment includes an image forming apparatus, an erasing apparatus, a first apparatus, and a display unit. The image forming apparatus forms an image on a sheet using a decolorable color material. The erasing apparatus decolorizes an image. The first apparatus computes, from a reduction in the number of sheets achieved by a setting for image formation in the image forming apparatus, the amount of a reduction in environmental burdens achieved by use of the image forming apparatus and computes, from the number of sheets erased by the erasing apparatus, the amount of a reduction in environmental burdens achieved by use of the erasing apparatus. The display unit simultaneously displays the amount of the reduction in environmental burdens achieved by the image forming apparatus and the amount of the reduction in environmental burdens achieved by the erasing apparatus.

A printing apparatus includes a feeding units, a detecting unit, a designating unit, and a control unit. The detecting unit detects a respective operation on each of the feeding units. The designating unit designates, in response to a user operation via a display, which of the feeding units is to be used for printing. The control unit executes, in response to a command to execute predetermined printing, a process based on a first feeding unit on which an operation has been last detected by the detecting unit and a second feeding unit designated by the designating unit. Based on that the first and second feeding units are different, the control unit displays, as the process, a predetermined screen on the display. Based on that the first and second feeding units are the same, the control unit executes, as the process, the predetermined printing on a second feeding unit fed sheet.

A control apparatus includes a storing unit, a determining unit, a first notification unit, a selection unit, and a second notification unit. The storing unit stores attribute information of sheets to be stored in sheet holding units. The determining unit determines whether attribute information of sheets to be used by a job corresponds to the stored sheet attribute information. The first notification unit notifies, in a case where the determining unit determines that the attribute information does not correspond, a user that the attribute information does not correspond to the sheet attribute information. The selection unit selects the stored sheet attribute information to change the attribute information of sheets to be used by the job. The second notification unit notifies, in accordance with selection of the sheet attribute information, the user that the attribute information of sheets to be used by the job corresponds to the stored sheet attribute information.

An image forming apparatus includes: a memory that stores a setting for a first process in association with an identifier; a receiver that receives the identifier, image data, and a request for a second process from a host apparatus capable of requesting the second process but incapable of requesting the first process; and a processor that performs the first process on a basis of the image data according to the setting stored in association with the identifier.

A printing apparatus that is capable of executing, based on printing data, printing onto a first side of a printing medium and printing onto a second side, which is the back side of the first side, after the printing onto the first side is provided. A print density of a predetermined region at a rear end of the printing medium in a transporting direction at a time of printing of the first side is identified based on the printing data. Conversion data, which is a conversion coefficient to make the identified print density equal to or lower than a predetermined density, is acquired. The printing data is converted by means of the conversion data. Printing onto the first side is executed based on the converted printing data.

A document feed portion of an image reading device is capable of feeding a document placed on a first document placement portion, to a predetermined reading position. A size detection portion detects a size of the document placed on the first document placement portion. A storage processing portion stores size information indicating the size of the document detected by the size detection portion, into a predetermined storage medium. An image reading portion performs a reading process of scanning a read surface of the document placed on a second document placement portion, to read an image. A setting portion sets the size information stored into the storage medium by the storage processing portion, as size information to be used for the reading process by the image reading portion.

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.