Abstract: Certain embodiments provide a marking apparatus, which marks on media that is reusable by recording and erasing decolorable material, comprising a scanner configured to read media to which a first mark representing the reuse times of media is attached; a determination section configured to determine whether or not the media is reusable according to a reading result of the first mark or a use state of the media; and a recording section configured to print a second mark different from the first mark on the media according to a determination result representing that the media cannot be reused.

Abstract: An image processing apparatus including: a first housing; and a second housing, the second housing including: a base part; a supporting part; an image reader; and a detector, the first housing including: an image forming unit and a cover, wherein: the cover has a 1st region disposed on a lower position of the detector and a 2nd region disposed on an upper position of a moving range of a recording head; the 1st region has a recessed part recessed downward, an inner bottom surface of the recessed part being disposed at a position lower that an upper edge position of the 2nd region; the base part has a housing part; and a lower edge of the detector is lower than the upper edge position of the 2nd region.

Abstract: An image reading device includes a first unit to read one surface of a document in a first area facing a document path, a second unit disposed in the first area to read the other surface of the document, a first reference member facing the first unit at a first distance therefrom at a second position in a second area not facing the path, a second reference member facing the first unit at a second distance therefrom at a first position in the first area, a third reference member facing the second unit at the second distance therefrom, and a correction unit to correct, based on a difference between first data generated through reading of the first member by the first unit and second data generated through reading of the second member by the first unit, third data generated through reading of the third member by the second unit.

Abstract: An image processing apparatus that generates a halftone image by quantizing an input image includes: a holding unit configured to hold a threshold value matrix in which different threshold values are arranged; a pixel position determination unit configured to determine a candidate of a pixel position whose threshold value is to be rewritten based on each pixel value of a plurality of pixels included in a predetermined area for the predetermined area in the input image; and a threshold value determination unit configured to determine a threshold value of the pixel position determined to be the candidate by using at least one threshold value of a plurality of threshold values corresponding to the predetermined area.

Abstract: An image processing apparatus according to an embodiment of the present invention performs a first correction for an image based on a correction value corresponding to a step designated by an operator among a plurality of steps corresponding to a plurality of correction values used for correcting the image. The image processing apparatus stores information used for specifying a change amount of a correction value corresponding to a change of one step of the plurality of steps in a memory. The change amount can be changed, and the change amount at the time of operator's designating the step is stored. The image processing apparatus performs a second correction for the image based on the change amount of the correction value corresponding to the change of the one step that is specified by the information stored in the memory.

Abstract: A data-bearing image (391) is created from a carrier image (371). The carrier image (371) is scaled to produce a scaled image. A clustered-dot halftone screen is applied to the scaled image to produce a halftone image. A resulting number of cells in the halftone image conforms to a cell count (372) that includes a horizontal cell value and a vertical cell value. Payload data is encoded into the halftone image to produce a data-bearing halftone image, including shifting pixel clusters within cells of the halftone image that include pixel clusters.

Abstract: An image processing device includes a first control circuit to transfer image data of a plurality of color components on a line basis in a main scanning direction, and a second control circuit connected to the first control circuit to process the image data of each one of the plurality of color components transferred from the first control circuit and output the processed image data on a line basis on an object. The first control circuit includes a plurality of registers provided for each one of the plurality of color components, a calculation circuit connected to the plurality of registers, a plurality of addition circuits provided for each one of the plurality of color components and connected to a corresponding one of the plurality of registers and the calculation circuit, and a transfer control circuit connected to the calculation circuit and the plurality of addition circuits.

Abstract: The dither mask generation method includes: a process of setting a nozzle relative ejection rate which is a control target of the nozzle ejection rate and stipulates a relative using ratio of the individual nozzles; a process of setting a nozzle pattern indicating correspondence relation between individual pixels of the dither mask and the nozzles in charge of recording at respective pixel positions; a process of setting an upper limit to the nozzle ejection rates of the individual nozzles for each raster in a main scanning direction, regarding at least some thresholds; and a process of setting the thresholds to the pixels of the dither mask based on the nozzle relative ejection rate, the nozzle pattern and a limitation by the upper limit.

Abstract: A printer includes a calibration reference object, which includes a calibration surface for performing calibration of a color measurement machine that performs color measurement of media, and a pressing force plate that determines a relative position of a media surface of the media and the calibration surface so that the media surface of the media and the calibration surface have a predetermined positional relationship.

Abstract: An image forming apparatus includes: a raster image processing unit configured to convert original image data into image data for image formation being of a raster image; an image forming unit configured to form an image on a paper sheet; a reading unit configured to generate read image data by reading the image formed on the paper sheet; a monitor setting unit configured to set a monitor setting color and an ideal value for the monitor setting color; a color tone monitoring unit configured to monitor a color tone difference between a value of the read image data in the monitor setting color and the ideal value; and a hardware processor configured to perform control to have color correction performed in the image forming unit, wherein the monitor setting color includes at least one of a primary color, a secondary color, a tertiary color, and a tertiary achromatic color.

Abstract: An image forming apparatus includes: an economy mode color conversion section that converts, in printing execution in the economy mode by the image forming apparatus, colors of the image based on an economy mode color conversion table; and the economy mode color correction section that corrects at least one of the two colors in the image the colors of which have not yet been converted by the economy mode color conversion section. When Voronoi regions respectively corresponding to the two colors in an economy mode Voronoi diagram are the same regions under condition that Voronoi regions respectively corresponding to the two colors in a normal mode Voronoi diagram are different regions, the economy mode color correction section corrects the at least one of the two colors in a manner such that the Voronoi regions respectively corresponding to the two colors in the economy mode Voronoi diagram become different regions.

Abstract: A color patch generation apparatus includes a printing unit that prints color patches for first color space acquisition in a certain region of a plurality of sheets of paper by a certain number of patches and in a certain patch size, and prints color patches for second color space acquisition in a region different from the certain region of at least one of the plurality of sheets of paper by a certain number of patches and in a patch size smaller than the certain patch size.

Abstract: An image forming apparatus includes a color conversion unit, a representative-hue-range acquiring unit, and a color correction unit. In a Voronoi diagram based on a grid point of the color conversion table with respect to one hue range of the two representative hue ranges obtained by the representative-hue-range acquiring unit, when a movement pixel corresponds most to a Voronoi region where the pixels inside the one hue range in the specific part corresponds most, the movement pixel being a pixel inside the other hue range of the two representative hue ranges in the specific part with only the hue of the pixel being moved to the one hue range, the color correction unit corrects color of the image inside the other hue range in the specific part such that the movement pixel does not correspond to the Voronoi region.

Abstract: The image forming apparatus includes: a measuring unit configured to measure reflected light from a test sheet, the measuring unit including a first sensor and a second sensor, a generation unit configured to generate information regarding a color of a plurality of measurement images based on a measurement result by the measuring unit; and a detection unit configured to detect a sensor that has output an abnormal measurement result in the measuring unit, based on the measurement result. The detection unit is further configured to detect a sensor that has output the abnormal measurement result, based on measurement results obtained by the measuring unit regarding reflected light from a predetermined region of the test sheet. The predetermined region corresponds to a region on which the plurality of measurement images are not formed.

Abstract: An input unit receives first image data to be printed with a first ink. A luminance value calculator calculates the luminance value of each pixel included in the first image data. A luminance value converter converts the luminance value to a value which is equal to or greater than a previously-set luminance setting lower limit, and is equal to or less than a previously-set luminance setting upper limit. A printing unit prints a first image based on the first image data with the luminance values converted by the luminance value converter on a print body with a first ink, and prints a second image based on second image data on the print body with a glossy second ink to form a glossy image including the first and second images superimposed on the print body.

Abstract: A printing system and method to process image data is disclosed. The printing system includes an identification module and image pipeline module include a linear threshold array algorithm and a halftoning algorithm to process the image data. An image pipeline module applies a linear threshold array algorithm to line regions and a halftoning algorithm to the non-line regions.

Abstract: Method, system, and graphical user interface for enabling optimal colorant job programming. A graphical user interface displays a plurality of gamut mode selectable features. One or more of the gamut mode selectable features can be selected for image processing of an image. A graphical image can be displayed within the next of the user interface based on image processing of the image, and in response to selection of a gamut mode selectable feature. The resulting displayed graphical image with the user interface can demonstrate to a user the benefit of utilizing additional colorant on the image particular pixels in the graphical image, which can benefit from the additional colorant.

Abstract: An image processing apparatus includes a control unit configured to control execution of monochromatic calibration and multi-color calibration, and a registration unit configured to register paper types of paper to be used at time of execution of the monochromatic calibration, a monochromatic target value set for each of the paper types used for the monochromatic calibration, paper types of paper to be used at time of execution of multi-color calibration, and a multi-color target value set for each of the paper types used for the multi-color calibration. The image processing apparatus executes the multi-color calibration, after executing the monochromatic calibration, via the control unit by using paper of a paper type selected from common paper types out of the registered paper types and the monochromatic target value and the multi-color target value set for the selected paper type.

Abstract: A correction method for an image forming apparatus including: a light source including light emitting points, a photosensitive member configured to rotate in a first direction, and a deflecting unit configured to deflect light beam emitted from the light source in a second direction orthogonal to the first direction to form scanning lines, the correction method including a correction step of correcting sparseness and denseness of density in the first direction caused by deviation of the scanning lines by moving a predetermined pixel in the first direction in accordance with the deviation, and causing a pixel value of the predetermined pixel to be output in accordance with movement of the predetermined pixel, wherein the correction step corrects the sparseness and denseness of the density based on the deviation of the scanning lines and the pixel value of the pixel, which are adjusted in accordance with an image forming condition.

Abstract: A controller includes an acquisition unit that acquires paper type information from each of a plurality of image output devices managed in a management system, a grouping unit that performs grouping of a plurality of managed image output devices based on paper information acquired by the acquisition unit, and a display controller that displays the managed image output devices having undergone the grouping performed by the grouping unit on a display unit. If the acquisition unit acquires current-fed-paper-type information, the grouping unit performs the grouping based on the current-fed-paper-type information. If the acquisition unit does not acquire the current-fed-paper-type information, the grouping unit performs the grouping based on calibration-executable paper type information included in the paper type information acquired by the acquisition unit.