Abstract: Disclosed is a color adjustment method including color converting to obtain output CMYK values corresponding to an object indicated by input image data from the input image data by using a color conversion table for converting the input image data to the output CMYK values which is created on the basis of an output device profile. The color adjustment method further includes color adjusting to obtain adjusted CMYK values from the output CMYK values by using a color adjustment table for converting the output CMYK values to the adjusted CMYK values, the color adjustment table is created on the basis of a third conversion table for converting the color value indicating the coordinate in the device-independent color space to the adjusted CMYK values and the first conversion table.

Abstract: There is provided a technique of enabling the use of a common printer profile even in a case where a configuration of a printer system is changed or added. Color data under a second configuration condition corresponding to an output color which matches or approximates an output color acquired through a first color predictor under a first configuration condition, is searched and acquired from color data subjected to total color material amount restriction processing acquired by total color material amount restriction processing using a first color material amount restriction profile under the first configuration condition, through a second color predictor under the second configuration condition. The color data searched and acquired under the second configuration condition and color data prior to total color material amount restriction processing are associated and a second total color material amount restriction profile under the second configuration condition is created.

Abstract: According to the present invention, it is possible to adequately restrict the total color material amount from the viewpoint of the second scale which substantially represents a color material amount, and sufficiently produce the color reproducibility which is potentially held by an image formation apparatus. Moreover, since the order of the CMY ratio in the space of the first scale is maintained, it is possible to smoothly secure the connection between tones.

Abstract: Methods and systems for color conversion used in image-processing. In one approach, a caching strategy can be employed rather than a direct computation or a precomputed table. To improve the hit frequency and reduce storage requirements, a hash calculation in addition to comparison operations can be processed as a “near match” rather than an exact match. In another approach, “fuzzy match” caching can be implemented to reach the proper vicinity in the n-dimensional space, and then interpolation (or extrapolation) can refine the result.

Abstract: A halftone screen producing apparatus is provided. The halftone screen producing apparatus includes: an input unit to receive screen information, a dot center arrangement unit to arrange dot centers within a screen based on the screen information, a Voronoi calculation unit to calculate a Voronoi value for each dot within the screen in which the dot centers are arranged, a filter calculation unit to calculate a filter value for each dot within the screen in which the dot centers are arranged, and a dot value setting unit to set a dot value within the screen based on the calculated Voronoi value and the calculated filter value.

Abstract: An image forming apparatus including an image forming unit; a color conversion unit; a storage unit which stores a mixed-color pattern including a gradation of tones of a mixed color and a reference value of each of the tones; and a control unit which forms an image of the mixed-color pattern on the sheet with the image forming unit, compares color values representing color shades for each of the tones between an observed value of the image of the mixed-color pattern formed on the sheet and the reference value of the mixed-color pattern stored in the storage unit, and determines that the multi-dimensional LUT needs to be updated and updates the multi-dimensional LUT if a difference of the color values is determined to be large on the basis of a threshold value.

Abstract: A multi-printhead printing system, including first and second printheads adapted to print on a receiver medium. An alignment process includes printing a test pattern including features separated by predefined test pattern feature separations, where some features are printed with a first printhead and some features printed with a second printhead. An image of the printed test pattern is analyzed to determine a first camera pixel separation between two features printed with the first printhead, which is used to determine a camera scale factor. The camera scale factor is used to scale a second camera pixel separation between a feature printed with first printhead and a feature printed with the second printhead. The scaled second camera pixel separation is compared to a corresponding test pattern feature separation to determine an alignment error, which is used to adjust the alignment of the image data printed with at least one of the printheads.

Abstract: A method for detecting and growing isolated holes in a document image having a plurality of pixels is provided. The method includes isolating the pixels of the image to form a plurality of windows, each window having a target pixel; identifying a hole growth factor to grow an isolated hole in the received image; using the hole growth factor to identify tiered pixel patterns from a plurality of predefined, tiered pixel patterns, wherein each of the tiered pixel patterns having a predetermined hole growth factor; comparing the pixels within each window to the pixel patterns within the identified tier to identify a match between the pixels within the window and at least one of the pixel patterns; and changing a pixel value of the target pixel, when a match is identified, to grow the isolated hole by the hole growth factor.

Abstract: There is provided a printing apparatus which is configured to control a basic color in performing the basic color in a printing medium. The printing apparatus includes: a table in which a correspondence relationship between a grayscale value in image data of the basic color and a color material amount is defined; an obtaining section which is configured to obtain a density range of a color which is to be printed on the basis of the image data of the basic color; and an adjustment section which is configured to adjust a grayscale range of the table so that the grayscale value corresponding to a color material amount range which corresponds to the density range of the color is increased.

Abstract: A method for aligning image data printed on a receiver medium in a multi-printhead printer that includes printing a test pattern including features separated by predefined test pattern feature separations, where some features are printed with a first printhead and some features printed with a second printhead. An image of the printed test pattern is analyzed to determine a first camera pixel separation between two features printed with the first printhead, which is used to determine a camera scale factor. The camera scale factor is used to scale a second camera pixel separation between a feature printed with first printhead and a feature printed with the second printhead. The scaled second camera pixel separation is compared to a corresponding test pattern feature separation to determine an alignment error, which is used to adjust the alignment of the image data printed with at least one of the printheads.

Abstract: An image forming apparatus includes a forming unit configured to form an identical pattern on a plurality of pages of a recording material, a reading unit configured to read patterns on the plurality of pages formed by the pattern forming unit, a generation unit configured to generate a correction look-up table corresponding to each page by using the patterns on the plurality of pages, and a correction unit configured to correct output image data by using the correction look-up table corresponding to each page generated by the generation unit.

Abstract: A color management system includes an input device, an input processor, and a plurality of print engines. The input processor is configured to transform, using an input transformation stored on the input device, the digital image in an input source color space to a digital image in a standardized multi-color color space. A print engine processor of the print engine is configured to receive the digital image in the standardized multi-color color space from the input processor and transform, using a print engine transformation stored on the print engine, the digital image in the standardized multi-color color space to a digital image in a print engine multi-color color space. The input transformation includes a color gamut coverage at least equal to color gamut coverage of all the print engines in the color management system.

Abstract: Image forming devices, hard imaging methods, and methods of determining a transfer function are described.

Abstract: An image-reading apparatus, includes a variation acquiring unit that acquires a variation of a distance or an angle between a medium to be read and an imaging unit or a light source, and a color shift correcting unit that calculates a color shift between the medium and the imaging unit or the light source based on the variation acquired by the variation acquiring unit and corrects the color shift.

Abstract: The present disclosure relates to a method and system for processing isolated dots of an image to be printed by a printer. The method includes generating a random number, determining whether a target pixel is to be turned on and enabled for printing, determining a sum of pixels surrounding the target pixel in a plurality of pixels in a scanline of the image, the target pixel corresponding to an isolated dot in an input image, that are in an on state, the on state defined by a higher binary logic level relative to a binary logic level corresponding to a turned off pixel, determining a numerical value stored in a lookup table using the determined sum of pixels that are in the turned on state surrounding the target pixel as an index to the lookup table, and comparing the generated random number to the determined numerical value.

Abstract: A method for detecting and growing isolated dots in a document image having a plurality of pixels is provided. The method includes isolating the pixels of the image to form a plurality of windows, each window having a target pixel; detecting an isolated dot in the received image; identifying a dot growth factor to grow the detected isolated dot in the received image; using the dot growth factor to identify tiered pixel patterns from a plurality of predefined, tiered pixel patterns, wherein each of the tiered pixel patterns having a predetermined dot growth factor; comparing the pixels within each window to the pixel patterns within the identified tier to identify a match between the pixels within the window and at least one of the pixel patterns; and changing a pixel value of the target pixel, when a match is identified, to grow the isolated dot by the dot growth factor.

Abstract: A host device and method for a distributed printing setup includes a plurality of image forming apparatuses registered to a database and a user interface (UI) generator to generate a UI screen to generate a workflow relating to the image forming apparatuses. When the distributed printing setup of a file to be printed is requested on the generated UI screen, a workflow generator generates a workflow by combining the image forming apparatuses to distribute the printing job to the registered image forming apparatuses.

Abstract: An inkjet printer includes an image-forming part, forming an auxiliary layer on a base material by ejecting droplets of auxiliary ink and forming an image on the auxiliary layer by ejecting droplets of image-forming ink, the auxiliary ink changing a dot formation state of droplets of the image-forming ink. In a storage part, a reference table that associates each of a plurality of types of base materials with a proper dot area rate to be used when forming the auxiliary layer is stored. In a dot-area-rate determination part, a dot area rate to be used when forming the auxiliary layer on a target base material is determined as an auxiliary ink dot area rate by referencing the reference table using the type of the target base material. This enables the inkjet printer to form a highly precise image on various base materials.

Abstract: Image forming apparatus (100) creates a toner pattern on intermediate transfer belt (11) as a preprocessing of gradation correction, and calculates a cycle at which density unevenness is largest. Then, a toner image for gradation correction is formed so as to cancel cyclic unevenness at a cycle at which the largest density unevenness occurs. As a result of this, it becomes possible to suppress the deterioration of density detection accuracy and perform a highly accurate gradation correction even if density unevenness of any cycle occurs.

Abstract: The method of storing profile set storage method according to the present invention comprising (a) selecting as reconstruction data that enables to reconstruct a profile set, either size prioritized data, which is smaller than said profile set, or reconstruction speed prioritized data, which enables to be reconstructed within a shorter time period than is required for reconstructing the size prioritized data, and which is smaller than the profile set but is larger than the size prioritized data; (b) for generating the selected reconstruction data based on the profile set; and (c) storing the reconstruction data generated in the step (b) in a storage device.

Abstract: An image forming apparatus specifies as a blank area an area where a drawing object different from a latent image and a copy-forgery-inhibited pattern background image is removed from a copy-forgery-inhibited pattern image in a first page when printing is instructed, and lays out a drawing object of a second page in the specified blank area.

Abstract: In the image processing device, the color conversion part converts the input value to an output value by using a color profile. The correction part corrects the output value to a corrected value by using a correction table. The update part updates the correction table based on a density patch. The first and second amount is an estimated amount of the color material to be consumed when corrected image data corrected by either using the updated correction table or using an initial correction table, respectively, is printed. When the amount determining part determines that the first amount is greater than the second amount, the modifying part modifies the color profile such that the output value in the modified color profile specifies a less amount of color material than an amount of color material specified by the output value in the unmodified color profile.

Abstract: There is provided an image processing apparatus which can suppress degradation of an image quality in a recording material save mode processing and obtain an effect of consumption amount reduction of recording material desired by a user at low costs. A recording material consumption amount at the time of applying first color conversion processing unit is predicted corresponding to inputted image data. The setting of a second color conversion processing is changed from a prediction value and a target value of the recording material consumption amount.

Abstract: Force K processing is presented to replace gray color values of input data with only levels of black ink/toner when color management is not specified in the print job. A system converts input data of a print job to a CMYK color space of a printer by processing a lookup table of color values for the color space of the input data based on a detected color space of the input data to identify gray color values of the lookup table. The system also determines that these gray color values produce an output in the CMYK color space of the printer that includes one or more of cyan, magenta, and yellow color components. The system replaces the gray color values with black color values and corresponds the black color values of the lookup table with gray color values of the input data for conversion of the input data.

Abstract: When color data and monochrome data are mixed in a piece of bit map data rasterized from the job data, an image forming apparatus allows a user to set whether to perform pre-color conversion processing on the monochrome data to enable performing color conversion processing on the monochrome data using a color conversion table for color, or whether to disable printing the job data including the bit map data in which color data and monochrome data are mixed.

Abstract: This disclosure provides a method and system of generating a plurality of custom spot color look-up tables, each custom spot color look-up table associated with one of a plurality of modes associated with an image marking device. In addition, provided is a job workflow method and system which accesses the plurality of custom spot color look-up tables to print a custom spot color.

Abstract: A client terminal transmits a request to a printing apparatus for a registration web page for registering, in a print server, a printing apparatus used in a print service provided by the print server. The printing apparatus collects configuration information of the printing apparatus in response to reception of the request, and creates link information which contains the collected configuration information and is used to access the print server. The printing apparatus then generates a registration web page containing the created link information, and transmits it to the client terminal. The print server receives the configuration information of the printing apparatus transmitted from the client terminal via the registration web page transmitted to the client terminal. The print server creates printing apparatus information which associates the configuration information with user information of the user of the client terminal, and manages it in a storage medium.

Abstract: A method of adjusting a level of liquid to be deposited on a print media includes providing an image processing system. Image data for a page of a print job and information regarding a printing system to be used to deposit the liquid on the print media during a printing operation is provided to the image processing system. The image data for the page of the print job is converted into a bitmap appropriate for analysis of risk of excessive inking related print defects using the image processing system. The overall risk score is determined to be acceptable or unacceptable. The bitmap is released for printing when the overall risk score is acceptable. The image data for the print job page is modified when the overall risk score is unacceptable.

Abstract: An image processing apparatus has a color chart condition setter for setting colorimetric values of a designated color as a reference color, and an image data generator for generating image data of pixel values calculated such that a plurality of color patches are arranged in a two-dimensional pattern on a print medium around the reference color set by the color chart condition setter, and color differences in an equal color space between adjacent ones of the color patches are represented by a substantially equal interval along a row or column of color patches.

Abstract: Color lookup table smoothing employs propagation of a portion of an adjustment of a modified node to an unmodified node of a color lookup table (CLUT).

Abstract: An image processor includes: a receiving unit that receives an input of image data in a first color space; a first color conversion unit that performs color conversion of the image data received by the receiving unit to image data formed of a first combination of color components in a second color space; a second color conversion unit that performs color conversion of the image data received by the receiving unit to image data formed of a second combination of color components in the second color space, the second combination being different from the first combination; and an image generating unit that generates an image based on at least the image data generated by the first and second color conversion units. Each of the first and second combinations includes a smaller number of color components than the number of color materials to be used in formation of an image.

Abstract: A scanner device and a method executed in the scanner device are provided. The scanner device includes a generating unit that generates original image data representing a scanned original; a preparing unit that prepares one color-conversion profile among a plurality of color-conversion profiles having different data sizes, according to a feature of the original image data; and an outputting unit that outputs the original image data and the one color-conversion profile.

Abstract: A halftone correction device for an image forming apparatus including an intermediate transfer belt and performing halftone processes includes: a correction unit that performs halftone correction for each of the halftone processes using correction tables corresponding to the halftone processes; a pattern generation unit that generates on the belt halftone patterns based on at least one of the halftone processes; a measurement unit that measures image densities of the generated halftone patterns; an estimation unit that estimates, from the image densities of the halftone patterns, image densities of halftone patterns corresponding to the other ones of the halftone processes, by applying a relational expression as an estimation equation to patches of the halftone patterns having an equal image area ratio; and a table generation unit that generates the correction tables using target values and the image densities of the halftone patterns of the halftone processes.

Abstract: A image generation device generates, on a print medium, an image including a first image portion and a second image portion. The device has a first screen processing unit which generates image data by an area modulation screen having a first screen ruling, for pixels of the first image portion; and a second screen processing unit which generates image data by an area modulation screen or a density modulation screen having a second screen ruling which is higher than the first screen ruling for pixels of the second image portion. And the first screen processing unit generates a halftone dot at a center of gravity position of an image of the first image portion in a cell corresponding to a halftone dot formation area in the area modulation screen processing.

Abstract: The disclosure proposes the automatic use of the job or image content information of a print job. This information is used to automatically adjust the general printing procedure for a print engine. The job's image content information is analyzed in the context of the constraints of the print engine to determine an improved printing procedure, which may include cycle-up operation, process control cycles, or maintenance cycles for that particular print job.

Abstract: An image processing device performs an image process on image data and outputs printing image data to a printing apparatus which performs printing using special luster ink having special luster, and the image processing device includes: an input unit that inputs the image data; a specification unit that specifies an ink amount set that is combination of ink amounts of inks used in printing by the printing apparatus on the basis of color information and luster degree information of the input image data; and an output unit that outputs the printing image data for printing based on the specified ink amount set to the printing apparatus, wherein the image data includes the color information that is information representing a color of an image and the luster degree information that is information representing a degree of luster of the image based on spectrum reflectances at a plurality of angles.

Abstract: A computer generated method disclosed. The method includes performing an exact comparison between a first bitmap and a second bitmap, calculating a number of miscompared pixels that occurred during the comparison and calculating a quantity value representing a characteristic of the miscompared pixels.

Abstract: An image formation device includes a printing portion containing a detachable fixer, a fixer identification portion which identifies a type of fixer mounted on the image formation device, a sensor which reads an image printed on a paper by the printing portion, a gamma correction data generating portion which generates gamma correction data by reading a gamma correction chart printed on a paper by the printing portion and stores the generated gamma correction data in a memory medium such that the gamma correction data is associated with a type of the fixer and a type of the paper that are used for printing the gamma correction chart, and printer gamma correction portion which performs printer gamma correction on an image data to be printed based on the gamma correction data stored in the memory medium corresponding to the paper type and the fixer type used for printing.

Abstract: A recording apparatus using a recording head having a first recording element array and a second recording element array for one color component includes a first memory configured to store a plurality of first patterns which correspond to first, second, and third gradation values and in which dot data is allocated to the first recording element array or the second recording element array, a second pattern which corresponds to fourth gradation value and in which dot data is allocated to the first recording element array, and a third pattern corresponds to fifth gradation value and in which dot data is allocated to the second recording element array, a data acquisition unit configured to acquire multi-valued data at the first, the second, the third, the fourth and the fifth gradation value, a generation unit configured to generate dot data based on the multi-valued data generated by the acquisition unit.

Abstract: A display control apparatus according to an embodiment of the present invention includes: a grayscale converting circuit for converting input image data to output image data using a look-up table showing a correspondence between input image data of i bits and output image data of k bits larger than the i bits; and an LUT creating circuit for creating the look-up table based on ? data of 2k bits. The apparatus further includes a ? data storage circuit capable of storing the plural ? data in the LUT creating circuit.

Abstract: To add an arbitrary recording medium as a recording medium that can be used for calibration to maintain the quality of an image to be formed, an image forming unit forms a pattern image on each of a specific recording medium that can be used for the calibration and the arbitrary recording medium. A creating unit creates second conversion setting information applied to the arbitrary recording medium to convert luminance information into density information, using first luminance information obtained from the pattern image formed on the specific recording medium, second luminance information obtained from the pattern image formed on the arbitrary recording medium, and first conversion setting information applied to the specific recording medium for converting luminance information into density information. A determining unit determines a common image formation condition applied to the specific recording medium and the arbitrary recording medium based on the second conversion setting information.

Abstract: Methods and systems herein provide for halftoning of Run length (RL) encoded datastreams. In one embodiment, a print controller identifies a packet within a RL encoded datastream. The packing includes a header and a block of continuous tone data. The print controller identifies an array of conversion values for converting RL encoded data to halftone data, and indexes the array using one or more bytes of the block of bitmap data. The print controller then outputs halftone data from the conversion array based on the index to convert the RL encoded continuous tone data of the packet to halftone data for a print engine.

Abstract: An apparatus to control a printing density in an image forming device and a method thereof, capable of controlling the printing density of a printed matter according to an amount of pages for a single page and a print rate. The apparatus and method solve a problem wherein the printing density is recognized as being degraded due to an increase of pages for a single paper or a reduced print rate. The printing density is set automatically or manually, and a bias voltage applied to a developing roller is controlled according to set-up information so that the printing density is controlled.

Abstract: Conventionally, it is not possible to evenly correct a color conversion table of a reading device in the entire color region even with a limited number of patches. In order to correct a color conversion table, a color conversion table from a device-independent color space into a device-independent color space is newly stored. A shift in read data between devices is reflected in a correction 3D-LUT and a color conversion table is corrected using the correction 3D-LUT. Thereby, it is possible to correct the entire color region with a smaller number of pieces of data and with less time and effort than when a color conversion table is newly recreated.

Abstract: A method for printing on transparent medium using an ink-jet printer. The method includes providing a grayscale image having a plurality of pixels, each pixel having a pixel value corresponding to a brightness of the pixel; converting each pixel value to an ink output value for the ink-jet printer using a conversion function, wherein the conversion function maps the darkest pixel value to an optical density of greater than 2.5 and maps all other pixel values to an appropriate output pixel value such that a resulting printed image is perceived to be linearly bright across the image.

Abstract: There is provided a technique of enabling the use of a common printer profile even in a case where a configuration of a printer system is changed or added. Color data under a second configuration condition corresponding to an output color which matches or approximates an output color acquired through a first color predictor under a first configuration condition, is searched and acquired from color data subjected to total color material amount restriction processing acquired by total color material amount restriction processing using a first color material amount restriction profile under the first configuration condition, through a second color predictor under the second configuration condition. The color data searched and acquired under the second configuration condition and color data prior to total color material amount restriction processing are associated and a second total color material amount restriction profile under the second configuration condition is created.

Abstract: According to the present invention, it is possible to adequately restrict the total color material amount from the viewpoint of the second scale which substantially represents a color material amount, and sufficiently produce the color reproducibility which is potentially held by an image formation apparatus. Moreover, since the order of the CMY ratio in the space of the first scale is maintained, it is possible to smoothly secure the connection between tones.

Abstract: A gradation-correcting curve to correct a gradation of an input image is generated. Gradation correction based on the gradation-correcting curve is made to a boundary pixel of a color-reproduction space at the same saturation as that of a target lattice point and at a hue of the target lattice point. An equal-saturation line is set by using the boundary pixel of the color-reproduction space after the gradation correction. A saturation-correction amount of the target lattice point is decided based on the gradation-correcting curve and the equal-saturation line.

Abstract: In an implementation, conversion of K-only data from a source CMYK color space to a destination CMYK color space is managed. The destination CMYK color space is transformed to a virtual RGB color space, in which a neutral axis of the virtual RGB color space is set to be mapped to destination K-only output colors in a color separation table for mapping of source K-only grays to destination K-only grays. The source CMYK color space is converted to a device independent color space and the conversion is adjusted such that the source K-only grays are forced to have the same chrominance as the neutral axis of the virtual RGB color space in the color separation table. The LUT is generated to include a K-only mapping by combining the virtual RGB color space with the adjusted conversion of the source K-only grays.

Abstract: A data processing apparatus includes a virtual printer driver unit configured to receive job data of a job from an application executing unit, generate image data based on the job data, and generate print setting data by describing a print setting extracted from the job data; an output condition control unit configured to rewrite the image data and the print setting data generated by the virtual printer driver unit and determine an output destination from which the image data is to be printed out, in accordance with a rule including conditions for selecting the output destination and making a change in output contents of the job; and a transmission unit configured to select a printer driver corresponding to the determined output destination and transmit, to the selected printer driver, a print command relevant to a changed job corresponding to the image data and the print setting data that have been rewritten.