A recording control device that controls a recording device that discharges a dot to perform recording includes an edge detection unit configured to detect an edge of an image represented by image data, and a recording control unit configured to generate dot data specifying the dot based on the image data and to cause the recording device to perform recording based on the dot data. The recording control unit causes an internal region, located on an inner side of an edge region including the edge of the image, to be recorded using a dot having a smaller size than that of a dot used for recording of the edge region, or to be dot-off.

A method for modifying color density values in a dot-based printing system uses a control unit. The control unit implements the modification of the color density values after a raster image has been created and modifies the number and/or size of print dots to be applied to a printing substrate in order to attain pre-defined color density target values.

To generate a dot pattern whose deterioration of a feeling of granularity, density unevenness, and streaks are unlikely to be recognized visually by more effectively suppressing a change of an overlap of ink droplets on a printing medium. Halftone image data representing a dot pattern of each of two or more kinds of dot different in density reproduction is acquired. Then, in a case where there is a possibility that the contact state between dots changes due to a landed-dot shift of ink in a plurality of specific dots on a condition that dots are formed in accordance with a dot pattern in the halftone image data, the plurality of specific dots is replaced with dots of another kind whose number is less than or equal to that of the plurality of specific dots.

In a sheet printer and a method for a sheet printer, the sheet printer includes a media support plane, a print controller, a print head and a user interface including a preview window including a representation of the media support plane. The print controller is configured to receive at least one digital image intended to be printed on a media piece, to receive position information of the position of the media piece on the media support plane, to display a representation of the media piece in a preview window, to determine a first part of the at least one digital image which fits on the media piece when printed and a second part of the at least one digital image which does not fit on the media piece and will not be printed, and to display a representation the first part as an at least partial overlay on the presentation of the media piece according to at least one first visual parameter. The print controller is further configured to display a representation of the second part in the preview window according to at least one second visual parameter, which deviates from the at least one first visual parameter.

A printing device prints a patch chart including a plurality of first patches having a predetermined color and one or more second patches having a user specified color. A measuring member measures a color of a patch. The patch chart includes a plurality of patch columns having two or more patches among the plurality of patches arranged linearly. In a case that a patch column of the plurality of patch columns includes a second patch of the plurality of second patches, a controller performs a calibration process to calibrate the measuring member by controlling the measuring member to measure a color of a reference; and after the calibration process is completed, a color measurement process for a patch included in the patch column including the second patch, the color measurement process for the patch being to control the measuring member to measure a color of the patch.

In an example, a method includes receiving, at a printing apparatus, a print target. The method may also include printing a drop linearization chart on a sample of the print target and measuring the drop linearization chart to determine a measured drop linearization curve for the print target. The method may include comparing the measured drop linearization curve to a plurality of predefined drop linearization curves to determine a most similar drop linearization curve from the plurality of predefined drop linearization curves, and applying a linearization defined by the most similar drop linearization curve to print data to be printed on the print target.

A conveying device includes a sheet feeder that feeds a recording medium unreeled from a roll, a conveying roller that conveys the recording medium, and circuitry. The circuitry is to obtain a plurality of actual conveyance amounts each of which is a conveyance amount of the recording medium actually conveyed by the conveying roller at a time, calculate an adjustment value based on a difference between a target conveyance amount and each of the plurality of actual conveyance amounts to obtain a plurality of adjustment values, calculate an approximate line based on a plurality of adjustment points in a two-dimensional coordinate plane determined by the adjustment value and a diameter of the roll, specify an adjustment value corresponding to a current diameter of the roll based on the approximate line, and correct, based on the specified adjustment value, a conveyance amount by which the conveying roller conveys the recording medium.

A method of controlling an inkjet printer when printing on a substrate that is to be shrink wrapped on to an object (10), by loading an image file on to a raster image processor; undertaking raster image processing on the loaded image file to generate raster image data for controlling discharge of ink droplets on to the substrate; receiving an indication of a shape (19) of the object (10); and manipulating the generated raster image data in response to the indication of the shape (19) of the object (10) to alter the distribution and/or size of droplets applied to the substrate to take into account anticipated changes (14) in a dimension (11, 12, 13) of the substrate due to shrinkage into contact with the object (10). Also a printer for carrying out the method.

An inkjet printer includes a plurality of nozzles and forms an image on a medium with ink ejected from each of the nozzles, and includes: a detector that detects an ejection failure nozzle of the ink from the plurality of nozzles; a test image former that forms on the medium a test image to which an ejection amount of ink from a neighboring nozzle adjacent to the ejection failure nozzle is added as an extra and supplemented; and a job image former that forms on the medium a job image obtained by performing correction of adding as the extra on the ejection amount of the ink from the neighboring nozzle based on the test image formed on the medium.

A method of printing on an inkjet printer including a plurality of overlapping jetting modules includes analyzing image data within a stitch area to designate white pixels and non-white pixels. For rows where the stitch area includes white pixels, a hard stitch boundary is defined within the stitch area where image pixels to the left of the hard stitch boundary are to be printed using a left jetting module and image pixels to the right of the hard stitch boundary are to be printed using a right jetting module. For image regions where the rows of image pixels within the stitch area include only non-white pixels, a soft-stitching path is defined through the image region, and a fading function is used to gradually transition from printing image pixels with the left jetting module to printing image pixels with the right jetting module in a transition zone around the soft-stitching path.