A method in a page-wide array printing apparatus comprising at least first and second printing dies that overlap in a page width direction comprises the steps of calibrating the printing apparatus in a media advance direction to a higher resolution than the page width direction, the media advance direction being perpendicular to the page width direction, and using printing masks to control the operation of a plurality of nozzles in an overlap area between the first and second printing dies to reduce any visible defects caused by dot placement errors in the page width direction.

A sheet processing device that measures a property of media sheets to be processed in the device, controls a processing operation of the device on the basis of the measured property and transmits the measured property to another sheet processing device.

A printing device for performing printing by arranging a plurality of images in a predetermined printable range, wherein the printing device includes a calculation section for calculating the maximum number of the images that can be arranged in the printable range when the size of the image is changed according to each of a plurality of conversion scales for changing the size of the image and a list display section for displaying, as a list, the plurality of conversion scales and the maximum number corresponding to each of the plurality of conversion scales.

An image forming apparatus includes a device main body, a consumable, and a controller. The consumable is attachable to the device main body. The consumable includes a consumable memory for storing therein recycling history information indicating a recycling history of the consumable. The consumable memory includes a first storage area to which a usage amount of the consumable can be written and a second storage area to which the usage amount of the consumable can be written. The controller is configured to perform a determining process to determine, based on the recycling history information, one of the first storage area and the second storage area as a storage area to which the usage amount is to be written.

Examples relate to providing synchronized look-up table loading. In some examples, a print job is processed using an initial look-up table in processor memory. In response to the processing of the print job reaching a buffer trigger row of a portion of the print job, look-up metadata is accessed to locate a next look-up table. At this stage, the next look-up table is dynamically loaded into the processor memory as the processor continues to process the print job, where the processing of the print job begins using the next look-up table after a target row of the portion of the print job is reached.

A printing device can produce a bendable printed matter. The printing device acquires bending information including information of a bending region that is a region to be bent in a medium and information of the direction of the bending, and execute a first print mode in which printing is performed based on the bending information and a second print mode in which printing is performed differently from the first print mode. In a case of printing, in a printing region including the bending region of the medium, an image at least partially continuous in the direction of the bending, the coverage by dots of a liquid discharged to the bending region when printing the image in the first print mode is made lower than the coverage by dots of the liquid discharged to the bending region when printing the image in the second print mode.

A black-generation-and-UCR processing unit generates image data of a black ink color from image data of chromatic ink colors of the image and adjusts values of the image data of the chromatic ink colors correspondingly to generation of the image data of the black ink color. An image outputting unit causes a printing device to perform printing based on the image data. A print condition adjustment unit derives an ink coverage of the image on a print sheet, determines a black generation ratio corresponding to the ink coverage, and causes the black-generation-and-UCR processing unit to perform generation of the image data of the black ink color with the determined black generation ratio. The ink coverage indicates a ratio of ink usage amounts of the chromatic ink colors and the black ink color to a predetermined maximum value, for a pixel for which ink is ejected in the image.

An ejection malfunction nozzle detecting unit prints a test pattern on a print sheet using the recording head, and detects an ejection malfunction nozzle on the basis of a density distribution of a scanned image of the test pattern. Here, a resolution of the scanned image is lower than a resolution of the test pattern printed on the print sheet using the recording head. Further, a correction processing unit (a) stores into a predetermined storage device history data that indicates the ejection malfunction nozzle for which the correction process was performed, (b) refers to the history data and detects as an additional correction nozzle a nozzle included in the history data, among nozzles corresponding to a predetermined pixel range that includes a pixel corresponding to the detected ejection malfunction nozzle, and (c) performs the correction process for the detected ejection malfunction nozzle and the additional ejection malfunction nozzle.

In a printing device, a measurement position detection chart including a reference pattern and a detection pattern is printed on printing paper. A colorimeter performs color measurements on the chart. The reference pattern has a sufficient dimension in a paper width direction to cover the range of a color chart in the same direction. The detection pattern includes multiple rectangular patches arranged in a conveyance direction while deviating from one another in the paper width direction. The color measurements result in colorimetric data, containing detection pattern density values Dp1 to Dpn, which is used to identify, as a current measurement position qc, a position of a patch in the paper width direction corresponding to a density value Dpk generally equal to a reference density value Drf among the detection pattern density values Dp1 to Dpn.

In an image processing apparatus, in a case where an input recording mode is a first recording mode and a density characteristic value for a patch pattern in an input gradation value greater than or equal to a predetermined gradation is higher than the target density value associated with an input gradation value, in correction processing, a correction value for an input gradation value greater than or equal to the predetermined gradation is not 0, in a case where the input recording mode is a second recording mode and a density characteristic value for a patch pattern in an input gradation value greater than or equal to the predetermined gradation is higher than the target density value associated with an input gradation value, in the correction processing, a correction value for an input gradation value greater than or equal to the predetermined gradation is 0.