An image processing device includes an image data acquisition section configured to acquire image data of an image to be printed on a print medium; a parameter acquisition section configured to acquire parameters for performing physical based rendering of the print medium on which the image is to be printed as a 3D object, the parameters including a normal line map representing a normal line direction of an irregularities surface of the print medium related to a reflection direction of light incident on the print medium; a correction section configured to correct strength of an application effect of the normal line map corresponded with the 3D object; and a rendering execution section for generating a rendering image representing the print medium on which the image is printed by executing the physical based rendering using the image data and the parameters.

An image forming system operable to perform image formation on a sheet includes a storage for storing a sheet, a conveyor configured to convey a sheet along a conveyance path a sheet size setter configured to set a size of the sheet stored in the storage, a sheet size detector configured to detect a size of the sheet conveyed by the conveyor, at least one memory that stores at least one program, and at least one processor. The at least one program causes the at least one processor to perform obtaining a difference between the size set by the sheet size setter and the size detected by the sheet size detector, and controlling image formation, wherein when the difference is greater than a first reference value, the processor interrupts image formation, and when the difference is less than or equal to the first reference value and greater than a second reference value, which is smaller than the first reference value, the processor notifies a warning without interrupting image formation.

An image forming apparatus which is capable of reading an original, temporarily storing image data in a storage unit, and then transferring the image data to an image forming unit to improve FCOT in forming an image. A memory stores image data output from image reading units. An image forming unit forms an image on a recording medium based on the image data stored in the memory. A first memory output frequency in a first mode in which one side of an original is read and an image is formed on one side of a recording medium is lower than a second memory output frequency in a second mode in which both sides of an original are read and an image is formed both sides of a recording medium.

In some examples, a fuser for a printing device includes a memory device comprising corrective data corresponding to a reference color table for the printing device that is able to operate in a plurality of different modes, the corrective data comprising quantized coefficients derived from a compression of a difference color table including a plurality of difference nodes in which each difference node represents a value that is to be combined with a corresponding node of the reference color table, the quantized coefficients useable to produce a reconstructed difference table/ The corrective data including residue values to combine with the reconstructed difference table to produce a customized color table for a selected mode of the plurality of different modes.

A reflected light amount from a patch under a first light source is acquired, and a reflected light amount from the patch under a second light source whose wavelength band is different from the first light source is acquired. The type of a printing medium on which the patch is printed is determined based on the ratio of the two acquired reflected light amounts.

In a printing system capable of supplying a sheet of a job having undergone print processing by the printing unit of a printing apparatus to a post-processing unit capable of executing at least a specific type of post-processing among a plurality of types of post-processes, when the target job requires the specific type of post-processing, the printing apparatus is inhibited from executing print processing of the job without explicitly determining a sheet necessary for the print processing of the job by a user using a user interface unit. When the target job does not require the specific type of post-processing, the printing apparatus is permitted to execute print processing of the job without explicitly determining a sheet necessary for the print processing of the job by the user using the user interface unit.

An image forming apparatus includes a reading configured to read a shape of a sheet to be used for image formation, and an original sheet carrying an original image, and an image forming portion configured to form a toner image, corresponding to the original image read by the reading portion, on the sheet to be used for image formation. A fixing portion is configured to fix the toner image, formed by the image forming portion, to the sheet to be used for image formation. In addition, a controller is configured to control a fixing condition of the fixing portion in accordance with the shape of the sheet to be used for image formation read by the reading portion.

Print jobs call for printing multiple logical pages on the same sheet, using base colorants and an extension colorant, and call for a different number of printing passes of the extension colorant for different logical pages. A first bitmap is created, and a first printing pass prints the first bitmap. The first bitmap is then modified to leave only the extension colorant plane, to create a modified bitmap; and a second printing pass prints the modified bitmap on the same sheet. The modified bitmap is additionally modified by removing printing pixels for the logical pages that do not contain an instruction to perform an additional printing pass of the extension colorant; and an additional printing pass prints the modified bitmap. These printing passes are repeated until no more of the logical pages contain the instruction to perform an additional printing pass of the extension colorant.

A paper type identification apparatus includes a passage configured to allow a sheet to be manually inserted thereinto, a reading sensor configured to read a surface of the sheet inserted into the passage and a controller configured to output a notification after reading a first surface of the sheet by the reading sensor. The notification is a notification to urge a user to read a second surface opposite to the first surface of the sheet by the reading sensor, and determine a type of the sheet based on a reading result of the first surface by the reading sensor and a reading result of the second surface by the reading sensor.

A printing device displays a preview image of received image data, receives, based on the previewed image, an instruction to rotate the received image, rotates the received image data based on the received rotation instruction, and prints the rotated image data.