Abstract: A printing system includes at least one linehead that jets ink onto a print media and an integrated imaging system that captures images of the content printed on the print media. Each linehead includes one or more printheads. A flat field correction method for the printing system includes one or more printheads printing a test block having a known print density on the print media and producing a density variation trace for each of the one or more printheads by capturing an image of each printed test block and averaging pixel data in a transport direction. A negative print mask is then produced for each printhead in the one or more printheads by inverting each density variation trace. Each negative print mask is added to, or subtracted from, respective print data values transmitted to each respective printhead in the one or more printheads.

Abstract: A density variation correction method for a printing system includes printheads in at least one linehead printing a test block pattern on a print media. A density variation trace is produced for each printed test block in the test block patterns by capturing an image of each test block and averaging pixel data in a transport direction. The density variation traces associated with a known print density represented in the test block pattern are compared with a respective reference density value. A determination is made as to whether there is a difference between each density variation trace and the respective reference density value. If there is a difference, the density variation trace is adjusted to match the reference density value. The method can be repeated for all of the known print densities represented in the test block pattern and for all of the lineheads in the printing system.

Abstract: A printing system includes one or more lineheads that jet ink onto a first side of a print media. At least one roller supports a second side of the print media as the print media is transported through the printing system. A roller deformation adjustment mechanism abuts at least one roller and is configured to apply a force to the roller to deform the roller. The deformation of the roller compensates for web skew by changing the relative timing of ink flight times from the linehead to the first side of the print media. The linehead can be disposed on a movable support. The printing system can also include one or more linehead skew adjustment mechanisms configured to move the movable support to adjust a skew of the linehead.

Abstract: A printing system includes one or more lineheads that jet ink onto a first side of a print media. At least one roller supports a second side of the print media as the print media is transported through the printing system. A roller deformation adjustment mechanism abuts at least one roller and is configured to apply a force to the roller to deform the roller. The deformation of the roller compensates for web skew by changing the relative timing of ink flight times from the linehead to the first side of the print media. The linehead can be disposed on a movable support. The printing system can also include one or more linehead skew adjustment mechanisms configured to move the movable support to adjust a skew of the linehead.

Abstract: A printing system includes one or more lineheads that jet ink onto a first side of a print media. At least one roller supports a second side of the print media as the print media is transported through the printing system. A roller deformation adjustment mechanism abuts at least one roller and is configured to apply a force to the roller to deform the roller. The deformation of the roller compensates for web skew by changing the relative timing of ink flight times from the linehead to the first side of the print media. The linehead can be disposed on a movable support. The printing system can also include one or more linehead skew adjustment mechanisms configured to move the movable support to adjust a skew of the linehead.

Abstract: A printing system can include a movable support and a linehead disposed on the movable support. The linehead is positioned opposite a print media and jets ink onto a surface of the print media. One or more linehead skew adjustment mechanisms are configured to move the movable support to adjust a skew of the linehead. The printing system can include an imaging system that captures images of the surface of the print media and a processing device that analyzes the images to determine if the print media is skewed and to determine one or more linehead skew adjustment values when the print media is skewed.

Abstract: A printing system includes a linehead that jets ink onto a surface of the print media, an imaging system that captures images of the surface of the print media, and one or more linehead skew adjustment mechanisms adapted to adjust the skew of the linehead. A method for correcting for skew in a print media in the printing system includes capturing images of one or more test marks printed or formed on the print media and analyzing the images to determine whether the print media is skewed with respect to a transport direction of the print media. If the print media is skewed, one or more linehead skew adjustment values is determined to adjust a skew of the linehead. The skew of the linehead is adjusted based on the one or more linehead skew adjustment values.

Abstract: A method of printing is described for a page-width printer including a line head having a plurality of jetting modules that are staggered in a page-width direction. In a set up procedure, a test pattern is printed using the nozzles of adjacent jetting modules, and the pattern is analyzed to detect a stitch error in the overlap regions. The results of this analysis is used to calculate a set of correction values to be applied to print data subsequently sent to nozzles of the adjacent jetting modules to make a correction for the stitch error. During a subsequent production run, the print data sent to the nozzles of the adjacent jetting modules is analyzed to sense an image content attribute, such as gray or density level, of the print data. These results of the analysis of the print data is then used to calculate a dynamic adjustment that is used to adjust the set of correction values calculated during the set up procedure.

Abstract: A method of printing is described for a page-width printer including a line head having a plurality of jetting modules that are staggered in a page-width direction. In a set up procedure, a test pattern is printed using the nozzles of adjacent jetting modules, and the pattern is analyzed to detect a stitch error in the overlap regions. The results of this analysis is used to calculate a set of correction values to be applied to print data subsequently sent to nozzles of the adjacent jetting modules to make a correction for the stitch error. During a subsequent production run, the print data sent to the nozzles of the adjacent jetting modules is analyzed to sense an image content attribute, such as gray or density level, of the print data. These results of the analysis of the print data is then used to calculate a dynamic adjustment that is used to adjust the set of correction values calculated during the set up procedure.

Abstract: A method of printing is described for a page-width printer including a line head having a plurality of jetting modules that are staggered in a page-width direction. In a set up procedure, a test pattern is printed using the nozzles of adjacent jetting modules, and the pattern is analyzed to detect a stitch error in the overlap regions. The results of this analysis is used to calculate a set of correction values to be applied to print data subsequently sent to nozzles of the adjacent jetting modules to make a correction for the stitch error. During a subsequent production run, the print data sent to the nozzles of the adjacent jetting modules is analyzed to sense an image content attribute, such as gray or density level, of the print data. These results of the analysis of the print data is then used to calculate a dynamic adjustment that is used to adjust the set of correction values calculated during the set up procedure.

Abstract: A method of printing is described for a page-width printer including a line head having a plurality of jetting modules that are staggered in a page-width direction. In a set up procedure, a test pattern is printed using the nozzles of adjacent jetting modules, and the pattern is analyzed to detect a stitch error in the overlap regions. The results of this analysis is used to calculate a set of correction values to be applied to print data subsequently sent to nozzles of the adjacent jetting modules to make a correction for the stitch error. During a subsequent production run, the print data sent to the nozzles of the adjacent jetting modules is analyzed to sense an image content attribute, such as gray or density level, of the print data. These results of the analysis of the print data is then used to calculate a dynamic adjustment that is used to adjust the set of correction values calculated during the set up procedure.

Abstract: Methods and systems for printing an image on a receiver medium are provided. In accordance with the method, digital image data representing an image to be printed is received and, a print engine is used to print an image on the receiver medium based upon the digital image data and initial printing settings. A press sheet image is captured of the image printed on the receiver medium and, the press sheet image is automatically compared to the digital image data to detect differences. Selected types of differences can be identified or can be addressed by adapting the press sheet image or adjusting digital image data prior to comparison.

Abstract: A proof generation method is disclosed for proof printers. The method includes receiving halftoned primary color print data to be printed on a target halftone printing press. This halftoned primary color print data has been produced by a first halftoning technique, and is at least comparable to a target halftoning technique used by the target halftone printing press. A second, different halftoning technique is also applied to the print data. The two halftoning techniques are selected to cause a dot size in data provided to the proofing printer to more closely match a dot size for the halftone printing press, and cause a proof produced by the proofing printer to substantially match the color of a print produced by the target halftone printing press.

Abstract: A system and method for use in testing and calibrating both electronic and traditional photographic devices. An illuminator with solid-state emitters and having independent control of both output spectral characteristics and power level enable the system and method to accurately test and calibrate the desired equipment.

Abstract: One general aspect of the invention provides for creating half-tone ink-jet proofs on print-enhanced sheets based on an effective image cell pitch that substantially matches a cell pitch used to create press plates. Print process variables can be adjusted for the ink-jet proofing printer based on received color matching information. These adjustments can define preprint ink mixing ratios that allow at least some image cells to be printed with ink mixtures. Or they can define sub-area printing values that allow at least some dots to be printed with areas of different inks.

Abstract: One general aspect of the invention provides for creating half-tone ink-jet proofs on print-enhanced sheets based on an effective image cell pitch that substantially matches a cell pitch used to create press plates. Print process variables can be adjusted for the ink-jet proofing printer based on received color matching information. These adjustments can define preprint ink mixing ratios that allow at least some image cells to be printed with ink mixtures. Or they can define sub-area printing values that allow at least some dots to be printed with areas of different inks.

Abstract: An illuminator suitable for accurate colorimetric work in electronic imaging and traditional photograghic environments uses an integrating chamber, a plurality of light emitting diodes (LEDs) and a controller for controlling the emitted energy form the LED. An LED support member assures that the beam of energy will be directed along a predetermined path between the energy inlet end and energy outlet end of the integrating chamber. Energy of a predetermined wavelength is filtered from entering the integrating chamber.

Abstract: A method of calculating a set of color-correction matrix coefficients for an image capturing device uses an LED illuminator having programmable output characteristics and spectral characteristics. A first XYZ data set is created from computed tristimulus values for each of the object stimulus. An image of each one of the predetermined set of object stimulus is captured thereby producing a plurality of images. RGB values are determined and normalized for each image thereby creating an RGB data set. A set of color-correction matrix coefficients are then calculated for the RGB data set corresponding to the first XYZ data set, thereby producing a color corrected RGB data set.

Abstract: An illuminator suitable for accurate colorimetric work in electronic imaging and traditional photograghic environments uses an integrating chamber, a plurality of light emitting diodes (LEDs) and a controller for controlling the emitted energy form the LED. An LED support member assures that the beam of energy will be directed along a predetermined path between the energy inlet end and energy outlet end of the integrating chamber. Energy of a predetermined wavelength is filtered from entering the integrating chamber.

Abstract: A system and method for use in testing and calibrating both electronic and traditional photographic devices. An illuminator with solid-state emitters and having independent control of both output spectral characteristics and power level enable the system and method to accurately test and calibrate the desired equipment.