An inkjet printing apparatus includes: a positional displacement amount calculation unit configured to, during printing processing, calculate a positional displacement amount of printing paper in a paper width direction based on colorimetric data obtained by colorimetry of a color chart by a colorimeter; a colorimeter movement mechanism configured to move the colorimeter; and a colorimeter movement control unit configured to control an operation of the colorimeter movement mechanism based on the positional displacement amount calculated by the positional displacement amount calculation unit.

A direct printing method for printing on an irregular container, wherein a pixel offset is determined for a pixel of a printing original for a printed image based on a target diameter and an actual diameter of the container to be printed on, wherein a corrected printing original is generated based on the determined pixel offset, wherein, based on the corrected printing original, the print image is applied to the irregular container by means of a direct printing apparatus having a plurality of printing nozzles.

The inkjet printing apparatus is configured to be able to execute a batch adjustment process of performing a plurality of times of adjustment processes related to printing in succession based on one instruction from an outside. The conveyance control unit maintains the conveyance speed at a first speed in a period when a chart printing process is performed and a period when a chart imaging process is performed. The conveyance control unit decreases the conveyance speed from the first speed to the second speed after the end of the chart imaging process in an adjustment process except for an adjustment process that is performed last in the batch adjustment process, and increases the conveyance speed from the second speed to the first speed before the start of the chart printing process in an adjustment process that is performed next.

A calculating unit calculates, as a reference number N of scans, a sum by adding 1 to a product M of the number m of scans in a main-scanning direction and the number n of scans in a sub-scanning direction. An assigning unit assigns, as a count of scans indicating a scan order, an integer 1 or more and the product M or more to each pixel of a unit image. A changing unit changes the count of scans of some pixels to which a first scan is assigned to an N-th scan. The generating unit generates print data, in which nozzle groups from a nozzle group arranged on a downstream end in the sub-scanning direction to a nozzle group arranged on an upstream end are sequentially assigned to pixels from the pixels to which the first scan is assigned to the pixels to which the N-th scan is assigned.

This disclosure is directed to improving the precision of color reproducibility in a whole image region of any product provided with a base layer(s) regardless of any form of the base layer(s). The RIP (Raster Image Processor) device includes a color conversion processor that applies a color conversion process adapted for presence or absence of a base layer and for a base color to content data representing part or all of details of an image layer at a respective one of positions in an image region indicated by the image layer, and an image layer data generator that generates image layer data representing ejection-related information of ink droplets of a plurality of colors using the content data that has been subjected to the color conversion process.

A server includes: a communicator communicable with an apparatus configured to perform a scanning operation and a printing operation using an ink-jet head; and a controller. The controller controls the server to: receive, from the apparatus, scan data representing a printing sheet printed by the ink-jet head; determine whether cleaning of the ink-jet head is required, based on the received scan data; transmit permission information to the apparatus when the server determines that the cleaning of the ink-jet head is required, the permission information indicating permission of the cleaning of the ink-jet head; and transmit non-permission information to the apparatus when the server determines that the cleaning of the ink-jet head is not required, the non-permission information indicating non-permission of the cleaning of the ink-jet head.

A printing apparatus for printing on an elongate printing medium includes the following elements: a transport mechanism for transporting the printing medium; a printing unit including a plurality of print heads arranged at intervals in a transport direction; a detecting unit including at least three detectors arranged as spaced from one another for detecting positions in a width direction of the printing medium; a variation history acquirer for deriving, for each detection cycle, a function approximate curve based on positions of the same location in the transport direction of the printing medium detected by the respective detectors, and acquiring from each function approximate curve, and as a variation history, a deviation amount in the width direction in each of the printing positions; a predicted position calculator for calculating, from the variation history, a predicted position in the width direction for each of the printing position; and a printing controller for printing while correcting the position based on the predicted position.

A printer is disclosed. The printer uses a target located on one side of media to position an image on the other side of the media. The printer backlights the media and uses a sensor that locates the target through the backlit media.

A color correction device includes: a color conversion unit configured to convert an input value in an input color space into an output value in an output color space; a selection unit configured to receive a selection, as a target color component, of one or more color components among a plurality of color components used in a printing device; and a correction unit configured to execute a first correction process of correcting, when the input value is a first type input value representing a color not including the target color component, a first type output value corresponding to the first type input value in a manner of reducing the target color component. The first correction process includes non-target-color component correction of reducing a color difference between before and after correction by correcting an output value component corresponding to a non-target-color component that is a color component other than the target color component among the plurality of color components.

A color correction device includes a color conversion section configured to convert an input value of an input color space into an output value of an output color space, a selection section configured to receive selection of one or more color components as target color components from among a plurality of color components used in a printing device, and a correction section configured to corrects a output value. The correction section configured to, when the input value is a first type input value representing a color that does not include the target color component, execute a first correction process that corrects a first type output value corresponding to a first type input value so as to reduce the target color component. The correction section configured to, when the input value is a second type input value within a propagated correction range set around the first type input value in the input color space, a second correction process that corrects a second type output value corresponding to the second type input value in accordance with a position of the second type input value within the propagated correction range.