Abstract: A second chromaticity value feature is corrected and approximated to a first chromaticity value feature, a new limit value for an ink amount is determined based on the second chromaticity value feature after the approximation, optimization is performed by designating an ink amount which is equal to or less than the newly determined limit value when an ink amount reproducing a hue value represented by a lattice point is determined by the optimization of the ink amount with the use of an object function for evaluating image quality when the designated amount of ink is made to adhere to a first print medium, the ink amount determined by the optimization is converted with a conversion relationship based on the first chromaticity value feature and the second value chromaticity feature.

Abstract: The color of a pixel in a scanned image is represented by two color components and is adjustable by interpolating between color component values obtained from elements in a bidimensional color remap look-up table. The table is sparsely populated and may be readily implemented in most scanner circuits without adding memory.

Abstract: An apparatus continues, before a number of pages where image data started to be input reaches N pages, inputting of the image data until an amount of the image data stored in a storage unit reaches a first amount, and thereafter, continue the inputting of the image data until the amount of the stored image data reaches a second amount, which is smaller than the first amount.

Abstract: There is provided an image copying apparatus provided with a scanner and a printer, the image copying apparatus comprising: an obtaining unit which obtains image data by causing the scanner to scan an image of an original; a correction unit which performs correction processing that adds, to saturation, a value corresponding to a difference between lightness before and after performing predetermined editing processing on the image data, with respect to a region where a correction is performed designated near the maximum saturation of a color gamut of the printer; and a control unit which causes the printer to print the image data corrected by the correction unit.

Abstract: Color management in which a spectral gamut is determined for spectral gamut mapping by constructing subdivisions of a set of samples spanning the spectral gamut. The samples are designated by specifying device values and are subdivided based on their lightness, chroma and hue under a reference illuminant such that the number of samples in each subdivision is limited by a predetermined number. A color value to be spectrally gamut mapped is accepted, and converted into a colorimetric value under the reference illuminant. The converted colorimetric value includes a lightness, a chroma and a hue. Subdivisions within a tolerance of the converted colorimetric value are identified using its lightness, chroma and hue. Samples within the identified subdivisions are searched to find a sample that matches acceptably to the color value relative to an objective function.

Abstract: A method and apparatus for performing color plane adjustment are provided. In one embodiment, an apparatus comprises a set of inputs for receiving a first input value and a second input value in a color space. The apparatus also comprises a color plane adjustment component operative to adjust the first input value and the second input value by amounts that depend on a distance of the first input value and second input value, respectively, from a value of neutral gray in the color space. The apparatus further comprises a set of outputs for outputting the adjusted first and second values. A related method and computer program are disclosed. Other embodiments are disclosed, and each of the embodiments can be used alone or together in combination.

Abstract: This disclosure provides methods, systems and apparatus for jointly optimizing node locations and corresponding output value of a color look-up-table (LUT) associated with an imaging device. According to one exemplary method, initially a set of LUT node locations are generated by solving a first optimization problem and subsequently, a set of LUT node values are generated by solving a second optimization problem.

Abstract: The present invention provides an image processing device capable of realizing appropriate color expression without requiring a large increase in data amount of image data for displaying a composite screen. A television broadcast receiver (1) includes a synthesis processing section (40) and an OSD processing section (24) for creating an OSD plane C as a composite screen in index color expression by combining an OSD plane U and OSD plane L, which are display screens in the index color expression. By the processing section (40) and the OSD processing section (24), the OSD plane C for attaining a display effect in which the OSD plane U and OSD plane L are superimposed is created.

Abstract: A standard density print profile capable of producing a print of standard densities is generated by a printing press set to standard density conditions, and a designated density print profile capable of producing a print of designated densities is generated by the printing press when the printing press is set to designated density conditions. A color conversion table capable of producing the print of the designated densities with the printing press set to the standard density conditions is generated using the standard density print profile and the designated density print profile. The colors of the image data are converted using the color conversion table.

Abstract: A color processing apparatus includes an input range obtaining unit configured to obtain an input range of input color data represented by a first color space that is an extended color space, a setting unit configured to set grid point coordinate values for each of a plurality of color components included in the input color data, and a generating unit configured to generate a look-up table by performing conversion processing on each of look-up-table coordinate values corresponding to grid point coordinate values set for the plurality of color components, and storing a result of the conversion processing in the look-up table. The setting unit sets the grid point coordinate values such that each of the primary colors in a second color space that is a base color space is located at a grid point and the color components have the identical grid point coordinate values among the primary colors.

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: In a preflight process for digital print systems, color data from print data are analyzed and the results presented in a report. The color data are individually altered in regard to not only a color profile, in which they are encoded, but also in regard to their color values, using a graphic user interface. Results of the alterations are displayed using corresponding screened document pages.

Abstract: A method of providing calibration data for a printer includes printing a calibration target using the printer. The target includes a plurality of patch sets, each including a plurality of test patches, each patch having a respective color. Scanned patch data for one of the sets are received from a spot scanner. The scanned patch data values are compared to respective aims to determine a reproduction error value for the scanned patch set. A processor automatically determines which of the sets should be scanned next using the calculated reproduction error value. The process is repeated until all sets have been scanned, or until the reproduction error value is less than or equal to a selected threshold. Calibration data are automatically generated using the scanned patch data.

Abstract: Disclosed is a color conversion method, the method including the steps of (a) converting a color using an approximation technique, and (b) correcting an error of the color using a preset error correction table containing information regarding a difference between a color channel based on an original conversion formula and a color channel based on the approximation technique.

Abstract: What is disclosed is a novel system and method of inheriting intended GCR into a 4-to-4 cascaded LUT to compensate for print engine change which adversely impacts the quality of an output print. The present method uses the device link transform to generate starting LUT nodes for the inverse of the drifted printer model by inputting CMYK or RGB into the device link at a color space resolution sufficient to determine output nodes. Lab and CMYK values are derived from this process, and a “starting LUT” is created at the Lab destination nodes. An iterative control begins with this starting LUT to produce an inverse drifted printer model that contains a close approximation for the intended GCR. The present method captures the intent of the device link transform for a fleet and generates the cascaded LUT for drift, specific printer, side1/side2, and other modes leading to special GCRs.

Abstract: In profile adjustment processing, if colorimetric conditions are different from those of when the profile is created, notification is performed to enable the profile adjustment with a high accuracy. According to the present invention, there is provided a method for processing a profile including acquiring a colorimetric value by measuring a color of a patch printed by an image forming apparatus based on patch data, performing a calculation for creating a profile based on the colorimetric value, storing the profile created by the calculation in association with information about a condition of the colorimetric measurement, comparing, when the profile is adjusted, the colorimetric condition corresponding to the stored profile with a colorimetric condition used when the color of the patch is measured to adjust the profile, and notifying a user if the comparison determines that the colorimetric conditions do not coincide with each other.

Abstract: System and methods for gamut bounded saturation adaptive color enhancement are provided. Color enhancement incorporating gamut bounded saturation enhances colors of an pixel from a source color gamut such that the resulting color is within a target color gamut. This resulting color may, for example, take advantage of an expanded target color gamut of a display. Gamut bounded saturation may be implemented independently or in combination with RGB bounded saturation.

Abstract: An image reading apparatus includes: a light source that generates light by synthesizing light from different illuminants and irradiates an irradiated object with the generated light; a reading unit that reads light irradiated by the light source and reflected by the irradiated object and generates image information in a first color space on the irradiated object; a color conversion unit that converts the image information in the first color space into image information in a second color space with a color conversion factor group; and a color conversion factor group setting unit that acquires from the reading unit the image information generated by using, as the irradiated object, a color sample formed in a color of light emitted by one of the illuminants, determines the color conversion factor group to be used, according to the acquired image information, and sets the color conversion factor group to the color conversion unit.

Abstract: An image processing apparatus is provided. The image processing apparatus includes: an acquiring unit that acquires original image data and a first color conversion profile associated with the original image data; an editing unit that edits the original image data by using the first color conversion profile to generate edited image data; a preparing unit that prepares a second color conversion profile different from the first color conversion profile in a first case where the editing unit generates the edited image data having a data size smaller than that of the original image data, wherein a data size of the second color conversion profile is smaller than that of the first color conversion profile; and a storage control unit that, in the first case, stores the edited image data and the second color conversion profile in a memory while being associated with each other.

Abstract: Disclosed are an image forming apparatus and an image forming method thereof. The image forming method includes: selecting at least one among plural scanning profiles needed for color management at a scanning operation of a document and plural printing profiles needed for the color management at a printing operation of the document according to a user's input; and generating a printing image based on the selected scanning and printing profiles and a preset scanning or printing profile.

Abstract: Aspects of the present invention are related to systems, methods and apparatus for calibration of multiple display apparatus in a display ensemble.

Abstract: A technique to compress multidimensional color look-up tables by computing an inexpensive fit to the contents of the tables is provided. At each node of the table, the difference between the result of evaluating the fit and the original value at that node are completed. In one form, the parameters of the fit and the differences are stored and compressed, possibly losslessly.

Abstract: The invention provides a method and apparatus for compressing and decompressing electronic image data, and in particular texture data. The compressed data comprises at least two sets of reduced size data, modulation data and modulation and discontinuity flags. The modulation and discontinuity flags determine how the modulation data is used, in combination with the reduced size data sets, in a decompression process. The invention allows for data decompression of textures including large color discontinuities.

Abstract: Stereoscopic color management of images with plural views. Image data for each view is defined in a component input device color space. Image data in the component input device color spaces is converted to a nominal source color space using plural input transforms each corresponding to one of the plural views. A rendering transform is used to convert image data for each view in the nominal source color space to a nominal destination color space. The nominal source color space, nominal destination color space and rendering transform are the same for all views. The image data for each view in the nominal destination color space is ultimately converted to a component output device color space associated with a stereoscopic output device respective of the view using a respective output transform.

Abstract: A method for color measurement of printing materials produced in printing machines includes a first color measurement instrument in the printing machine measuring the color of printing materials, a second color measurement instrument outside the printing machine measuring the color of printing materials produced in the printing machine and a computer communicating with the instruments, storing nominal color values and regulating color in inking units of printing units with the first instrument based on deviations from the stored nominal color values, determined on the printing materials in the printing machine. Printing materials produced by the printing machine are recorded by the second instrument. The second instrument records deviations from an original based on the color measured values determined on printing materials.

Abstract: At least certain embodiments of the disclosures relate to methods and data processing systems for matching a source profile to a destination profile. In one embodiment, a method includes providing a destination test chart and a corresponding first source test chart with each test chart having color patches. The method includes adjusting the source profile to substantially match a known or an unknown destination profile in response to receiving an input for visually matching an adjustable white color patch of the first source test chart to a corresponding white color patch of the destination test chart. The method includes progressively generating a second source test chart having modified at least some and possibly all color patches compared to the first displayed test chart based on applying a first transformation to the source profile in response to visually matching the white color patch.

Abstract: Methods for mapping color data having at least one color associated therewith to an output device based on an input-device profile and an output-device profile, each profile having a tone curve and a color matrix, are provided. In one embodiment, the method includes receiving color data from an input device and determining whether the color data is in a linear space. If it is determined that the color data is not in a linear space, the method further includes applying the tone curve of the input device profile to the color data to convert it into a linear space. The method further includes converting the color(s) associated with the color data from the input linear space to an output linear space by applying the color matrix of the input device profile and the inverse color matrix of the output device profile to create color-converted image data.

Abstract: A system and method is provided for improving color management of DeviceN color spaces in an electronic document. In one embodiment of the present invention, the system includes a memory device for storing a plurality of ICC profiles, and a rendering application operating on a computer, wherein each ICC profile includes a plurality of colorant names and an order in which they are laid down during a reproduction process. The rendering application is configured to render a document having at least one DeviceN color space so that it can be accurately displayed on a color display. The rendering application is further configured to identify a names array in a color definition of the DeviceN color space of the electronic document, compare the names array to the ICC profiles (or colorant names included therein) stored in the memory device to identify an ICC profile from the plurality of profiles, and (iii) use the identified ICC profile to map the DeviceN color space into control values for the color display.

Abstract: A device which accesses a video capturing equipment into a next generation network is disclosed in the present invention. The device includes a setting module for reading image formats supported by a video capturing equipment, setting a captured image format of the video capturing equipment according to the image formats and storing the captured image format; a receiving module for receiving an image; a format determining module for reading the stored captured image format; and a converting module for converting the received image from the corresponding image format to an image format supported by the next generation network and outputting the converted image to the next generation network. A method for accessing a video capturing equipment into a next generation network is also disclosed in the present invention.

Abstract: Systems and methods are described that facilitate reducing a number of patches used in characterizing a color halftone printer via a binary color printer model. A binary printer model involves printing of a fundamental set of color binary patterns that encompass all possible halftone outputs. A k-center clustering technique is employed to automatically find and eliminate redundancies in the initial set of binary color patterns. Once the number of patches is reduced to an acceptable number, a multiplicative reflectance model is applied that better approximates the physical process and therefore improves accuracy.

Abstract: What is disclosed is a novel system and method for determining color profiles based upon optimizing image output color stability. For each of a number of selected output colors, color stability values for a set of device-dependent color specifications that produce the selected output color are iteratively determined. The set of device-dependent color specifications is generated by varying a subset of colorants in the device-dependent color specifications while changing the remaining colorants to maintain the selected output color. The iterative process improves the color stability value, as determined by a color stability model, of the device-dependent color specifications that correspond to the selected output color. When an optimum color stability value is found, the device-dependent color specification having that color stability value is selected as the mapping for the selected device-independent color specification. Various embodiments are disclosed.

Abstract: An image processing apparatus that applies image processing to image data read from a memory, the image processing apparatus including: an image processing input circuit that acquires a command list from the memory by direct memory access and that outputs a command based on the command list; and an image processing circuit that is connected to the image processing input circuit and that sets a register or executes processing of the image data in accordance with the command outputted from the image processing input circuit. The image processing input circuit uses an address instructed by a register control command to acquire image data from a memory by direct memory access if a data acquisition command for instructing data acquisition is acquired from the command list, generates a data processing command including the acquired image data, and outputs the command to the image processing circuit.

Abstract: Embodiments of the present invention provide apparatuses and methods for determining usage maps in handheld image deposition devices. The utilization of usage maps in combination with color planes may facilitate the output of varying levels of intensity. Additionally, the storage of processed images and the print data associated with various image locations of the processed image, according to a consistent offset of memory addresses, may expedite retrieval of print information.

Abstract: In order to reduce the data amount of image data while preventing degradation of image quality, an MFP includes an image data acquiring portion to acquire image data, a region extracting portion to extract regions having predetermined attributes from the image data, a selecting portion to select one of the extracted regions, a reduction portion to reduce the data amount of the image data by processing the selected region in a manner predetermined for the attribute of that region, and a comparing portion to compare the data amount of the image data after reduction of the data amount with a predetermined target value, in which the selecting portion selects the regions one by one until the comparing portion determines that the data amount of the image data is equal to or less than the target value.

Abstract: Methods and systems are presented for characterizing a color rendering system or a color marking material design process, in which forward color transform parameters are generated for mapping color from a first color space associated with an internal color representation of the color rendering system or marking material design process into a second color space using a least squares minimization of an error metric weighted according to a Taylor series expansion of the error metric.

Abstract: An image forming apparatus includes an additional image creating unit, a composite image creating unit, and a printing unit. The additional image creating unit is configured to create an additional image by using information associated with externally acquired software data if the externally acquired software data comprises specific software data. The composite image creating unit is configured to create a composite image in which the additional image and an image of an original are composited. The printing unit is configured to print the composite image.

Abstract: What is disclosed is a novel system and method to reduce noise induced by color mixing in a color management system. At least one device color recipe is obtained for a target spot color. The recipe is defined for a color marking device and defines a range of marking device color values for a target L*a*b color value. Next, a minimal value and a maximum value of each color value in the range of color values for said target L*a*b color value are identified. An iterative process of searching is performed until the printed color test patch produces a visually acceptable smoothness while matching color accuracy. This iterative process includes generating at least one additional new device color recipe from color values within the range of color values. At least one of the new device color recipes is selected and provided to the color marking device for rendering.

Abstract: A method of decoding data that is encoded with a set of prefix codes begins by receiving the data at a computing device, and then compiling native machine code from the prefix code set for execution by a processing unit of the computing device. The machine code implements a binary tree of prefix codes that corresponds to the prefix code set. The data is decoded by traversing the prefix code tree, which is effected by executing the machine code with the processing unit.

Abstract: What is disclosed is a novel system and method for converting a set of L*a*b* values to CMYK color space in which all CMYK formulations that produce each L*a*b* value are found and enumerated. The CMYK formulations are found through a search algorithm starting with the lightest L*a*b* values then visiting neighboring L*a*b* values until the entire L*a*b* color set has been processed. The CMYK space is tessellated into a set of pentahedrons, and for each L*a*b* value, an enclosing pentahedron is found and the CMYK values corresponding to where the locus of this point penetrates each surface is recorded. Adjacent pentahedrons are then visited and this process continues until the gamut boundary is reached. The result is a piecewise linear representation of the CMYK locus containing all values that will give the target L*a*b* value. The present method provides a flexible and powerful approach for solving color management problems.

Abstract: A first color conversion unit converts RGB signals from a line input unit to L*a*b* signals. A lightness range compression unit matches the lightness range of the input color signals with that of an output gamut. If the maximum saturation point on an input line is outside the output gamut, an input line correction unit corrects the point in such a manner that it is mapped onto the surface of the output gamut. If a near-surface determination unit determines that the corrected line is not located on the surface of the output gamut, an out-of-gamut mapping unit maps it onto the surface of the output gamut, whereas if it determines that the corrected line is located near the surface of the output gamut, the surface mapping unit maps all points on the surface of the output gamut. A second color conversion unit converts the mapped L*a*b* signals to CMYK signals.

Abstract: A method of mapping colors which are outside a reproduction device's color gamut to reproducible colors uses a boundary of a reduced gamut. In a three-dimensional color space the reduced gamut is derived from the reproduction device's gamut by reducing its size in all three dimensions. Reduced-gamut clipping-vectors are determined by clipping the out-of-gamut colors onto the reduced-gamut boundary, and the out-of-gamut colors are mapped to those colors at which the reduced-gamut clipping-vectors intersect the reproduction device's gamut boundary. Thus out-of-gamut colors associated with clipping-vectors of different directions that are clipped onto the same point, or adjacent points, of the reduced-gamut boundary are mapped to points spaced apart, or spaced farther apart, on the reproduction device's gamut boundary.

Abstract: A novel and useful system and method for the serving and display of extended bit depth (EBD) high resolution images on a web browser using multimedia platform code or code for a graphics framework. To display an EBD image, such as an x-ray or MRI image set, on a web browser, the image data is mapped into a plurality of channels of pixels of a color image which a web browser is able to handle, where each channel holds a portion of the full dynamic range of the original EBD image. At the client, a color transform is applied to the color image data which takes into account the user's desired VOI settings. The resulting display image has the exact values as if the VOI was applied to the original EBD image and is dynamically mapped to the display capabilities of the client viewing framework thus enabling a reviewer to detect any available details of the image.

Abstract: A method for determining a blended color transform for use in producing printed colors on a color printer having at least four device color channels, comprising: forming first and second color transforms, wherein the first color transform produces printed colors that have a reduced sensitivity to color printer process variations in at least a first region of color space that includes a near-neutral color region, and wherein the second color transform produces printed colors that have a reduced image noise visibility in at least a second region of color space; defining a blending function which computes weighting values for the first and second color transforms as a function of input color values; and using a processor to determine the blended color transform by blending the first color transform and the second color transform, responsive to the blending function.

Abstract: A color look-up table includes a plurality of images recorded on a film. Each of the images being recorded on a separate picture of the film and containing at least a first level and a second level. The first and second levels having different pixel color values and are arranged to form a detectable geometric pattern on each of the pictures. The first field and a second field having detectable boundaries assigned to characterize distortions on the film.

Abstract: A display device capable of displaying an image selected by a user for a certain period of time without interruption even when power consumption to be used to completely display the image exceeds a remaining capacity of a battery, and a method of driving the same. The display device includes a storage element; a selection circuit configured to select an image stored in the storage element according to a user request; a battery; a first detection circuit configured to detect a remaining capacity of the battery; a controller; and a display panel coupled to the battery via the controller and configured to display the selected image in accordance with a control output of the controller.

Abstract: Methods and systems herein provide for color conversion. Such color conversion includes a method of optimizing gray component replacement in a color image that includes receiving a color image from an input imaging device (e.g., a digital camera, scanner, etc), determining a color gamut of an output imaging device, such as a printer, and generating a CIELab to CMY numerical model to convert the color image to a color space within the color gamut of the output imaging device. The method also includes generating a CMYK to CIELab numerical conversion model, removing a portion of CMY color values generated from the CIELab to CMY numerical conversion model, and replacing the removed portion of the CMY color values with black color values. The method also includes optimizing CMYK color values via a multidimensional optimization using the CMYK to CIELab numerical model.

Abstract: An image forming apparatus includes: an image output unit that outputs an image; and an image processing unit that converts an input image signal to an output image signal and outputs the image signal to the image output unit, the image output unit having: an image carrier that carries at least a latent image; plural developer containers containing mutually different color developers used for developing the latent image carried on the image carrier; and a transport member for repeated operations of attachment of the developer contained in one of the plural developer containers, transport of the attached developer to the image carrier, and removal of remaining developer, and the image processing unit having a change unit that changes a color conversion characteristic of an image signal in correspondence with color mixture of the mutually different color developers.

Abstract: A color look-up table includes a plurality of images recorded on a film. Each of the images being recorded on a separate picture of the film and containing at least a first level and a second level. The first and second levels having different pixel color values and are arranged to form a detectable geometric pattern on each of the pictures.

Abstract: The image processing apparatus includes: a color conversion unit color-converting an image signal of a first color space into that of a second color space with a color conversion characteristic defining a correspondence relationship between the image signals; an adjustment unit adjusting the image signal of the second color space with adjustment conversion factor groups that is for adjusting it in accordance with a change in the color conversion characteristic, and is set for respective types of sheets on which an image is to be printed according to the image signal of the second color space; a calculation unit calculating the adjustment conversion factor groups; a memory storing an associating factor group associating, with each other, the adjustment conversion factor groups; and an update unit updating the adjustment conversion factor groups according to the calculated adjustment conversion factor group of one sheet and the stored associating factor group.

Abstract: An imaging apparatus includes: a display unit for displaying color image data acquired by the imaging unit; a colorimetric position acquisition unit for acquiring colorimetric position data corresponding to a colorimetric part selected by a user in the image data displayed on the display unit; a colorimetric position data record unit for recording the colorimetric position data; a light source; a colorimetric unit, provided near the light source, for performing a colorimetric process at a colorimetric instruction from the user, and acquiring colorimetric data as a result of the colorimetric process; a colorimetric data record unit for recording the colorimetric data; and a storage unit for associating the image data displayed on the display unit, the colorimetric position data recorded on the colorimetric position data record unit, and the colorimetric data recorded on the colorimetric data record unit, and storing the data.