A system is disclosed. The system includes at least one physical memory device to store compensation logic and one or more processors coupled with the at least one physical memory device to execute the compensation logic to generate first ink deposition function representing a first output ink amount versus input digital count for each of a plurality of color planes, generate second ink deposition function representing a second output ink amount versus input digital count for each of the plurality of color planes and generate transfer functions for each of the plurality of color planes based on the first ink deposition function and the second ink deposition function, wherein the transfer functions transform input digital counts.

There is provided a printing apparatus including an obtaining unit configured to obtain print data in which in imposition image data in which one or more images are imposed in a print region, a code for identifying each image in the imposition image data is embedded; a determination unit configured to determine an ink color to be used to print the code by excluding an ink color satisfying a predetermined condition from candidates for the ink color to be used to print the code; and a print control unit configured to print the code based on the print data obtained by the obtaining unit using a plurality of nozzle arrays for the ink color determined by the determination unit.

The disclosed embodiments include a method to compensate for defective printer nozzles. The method can include detecting a defective printer nozzle and initiating a print job including image data of the defective printer nozzle for a pixel location of an image. The image is to be printed in accordance with a print mask that maps printer nozzles to pixel locations of the image. The method can include modifying the image to print the image data in a neighboring pixel location relative to the pixel location of the image and printing the modified image.

Disclosed is an industrial single-pass inkjet printer/press incorporating a line-scan camera. The line-scan camera enables system software to inspect every sheet for quality assurance purposes. These inspection results are tied back to a digital printer to take one or more of several possible actions. Actions include ensuring a particular number of acceptable prints are generated and sorted. Actions further include performing nozzle checks without pausing or interrupting production orders.

A method for printing an image on a substrate is provided. The method includes: providing image template data; analyzing the image template data by identifying image components; printing the image using the image template data using a printing procedure based on printing parameters with a printer operating using printer configuration parameters; capturing the printed image; providing captured image data of the captured image; analyzing the captured image data. The analyzing including determining the region of interest within the captured image data based on definition parameters, identifying an image component and an image metric for the region of interest, relating the image metric to the image component, relating the identified image component to the identified image component of the region of interest, selecting parameters based on the image metric and/or the image component, and computing an actual correction parameter based on an optimization computing procedure using the image metric.

A method for determining print defects in a printing operation carried out on an inkjet printing machine for processing a print job includes using a camera system to record and digitize printed products generated during the printing operation, feeding the camera image having been thus generated to a detection algorithm on the computer, alerting a machine control unit when print defects are found, and ejecting the printed product through a waste ejector if necessary. The detection algorithm separates color separations of the camera images, detects the print defects in the color separations, links images of the individual color separations to form a candidate image, filters the candidate image, enters the remaining detected print defects into a list, and forwards the list to the machine control unit of the printing machine.

Provided are a printing apparatus, a reading method, and a program capable of stably acquiring a high-quality read image. Provided are a printing section (102) that performs printing on a transparent base material to generate a printed matter; a reading section (40) that is disposed on one surface side of the base material and reads reflected light or transmitted light; an illumination section (122) including a reflective illumination part (122) that is disposed on the one surface side of the base material and irradiates the base material with illumination light and a transmissive illumination part (124) that is disposed on the other surface side of the base material and irradiates the base material with illumination light; an inspection information acquisition section (120) that acquires inspection information on an inspection performed on the printed matter; and an illumination control section (120) that selectively controls at least one of the reflective illumination part or the transmissive illumination part on the basis of the inspection information.

A digital printer and a method of controlling the digital printer having a print head with an array of printing elements and a failure detection system arranged to detect malfunctioning printing elements. When, during printing, a malfunctioning printing element is detected, a switch from the current print strategy to another print strategy is arranged during printing which leaves the number of passes per swatch constant, i.e. the print quality is not affected by the switch.

A printing system including a printing unit and an imaging unit is provided with: a defect detection unit that detects a defect included in a captured image; a defective nozzle position candidate extraction unit that extracts N position candidates as candidates for a position of a defective nozzle based on the position of the defect; a first correction unit that performs a defect correction process; and a defective nozzle identification unit that identifies the defective nozzle. The first correction unit performs the defect correction process while sequentially setting only N nozzles corresponding to the N position candidates one by one as a correction target nozzle. The defective nozzle identification unit identifies the defective nozzle based on the position of the defect detected by the defect detection unit based on the corrected image.

Techniques for reducing or eliminating image banding in an ink-jet image are provided. In an example, a method of operating a printer to reduce or eliminate image banding can include generating command profile for printing a given image, applying a filter to the command profile to provide a filtered profile, and dispensing ink from a printhead of the printer based on the filtered profile. In certain examples, the filter can randomize droplet sizes of ink dispensed while executing the printing to reduce or eliminate image banding.