Abstract: Methods and systems herein provide for color conversion in the real domain from an input color space to an output color space using a color conversion table that includes color values defined in the output color space corresponding to color values in the input color space, a table of scaling factors, and a conversion engine operable to group the real domain image data into blocks of pixels. The conversion engine, for each block of pixels, converts a color value in the block of pixels from the input color space to the output color space according to the color conversion table, computes differences between the color value and color values of pixels in the block, scales the computed differences according to the table of scaling factors, and adds the scaled differences to the converted color values to convert the pixel color values to the output color space.

Abstract: Confidentiality of a job that requires authentication processing prior to printing is maintained as much as possible. A method for controlling a printing system is provided that is capable of receiving a plurality of types of print jobs including a first type print job that requires authentication processing prior to printing and a second type print job that does not require authentication processing prior to printing, comprising the steps of allowing the printing system to execute a specific operation for allowing the printing system to start printing of a target job in case where resources required to complete printing of the target job are present in the printing system and causing the printing system to execute the specific operation in case where the target job is the first type job.

Abstract: Some embodiments of the invention provide several novel methods for distributing image content (e.g., picture content, video content, etc.). In some embodiments, the method tags the content with data that specifies an initial target color-region for the content. Some embodiments tag the data when the content is being created, while other embodiments tag the data when the content is being edited. The method uses the tag data to reformat the content for one or more different targets for the content. For instance, during the reformatting, some embodiments use the tags to perform proper color region conversion on the content. In some embodiments, this conversion converts the colors of each pixel in the content from the initial target color region to a subsequent target color region.

Abstract: Systems and methods are provided for generating at least one look-up table, wherein the look-up table holds at least one luminance value in a second color space. In some embodiments, the luminance value can be computed for distinct combinations of color component values corresponding to a plurality of color components in a first color space. The method comprises computing at least one luminance value in the second color space based on a portion of the color component value combination; deriving an address in a look-up table based on the portion of the color component combination; and storing the computed luminance value in the look-up table at the derived address.

Abstract: What is disclosed is a novel system and method for retrieving a gamut mapping for a color device. A ray-based model is derived from a system estimation of either a seed profile or a seed device. The model is hard coded inside a run-time ICC profile creation algorithm. The runtime profile generation code can be optimized for a variety of gamut mapping scenarios. The generated profile is provided to an imaging system wherein out-of-gamut colors are mapped to the color gamut of the host device. The present method provides an accurate way to reproduce colors of images by retrieving the gamut mapping from profiles or from the color device that use destination profiles for rendering images.

Abstract: According to color measuring apparatus and method and a liquid crystal display system S of the present invention, intensity signals obtained by receiving radiant light from a liquid crystal color display 3 at a first viewing angle and corresponding to at least three mutually different spectral responsivities are converted into information on a plurality of primary color intensities of the liquid crystal color display 3, and the intensity signals by the first viewing angle are corrected to signal intensities by a second viewing angle. Thus, these color measuring apparatus and method are capable of a more accurate measurement even at a dark gradation. The liquid crystal display system can more accurately calibrate a display surface 3a of the liquid crystal color display 3 even at a dark gradation.

Abstract: An image correction method includes the steps of: acquiring a black-side intermediate luminance distribution as a luminance distribution in a region between a lowest luminance in a given intermediate luminance region in a luminance distribution of input image data in an image frame and a reference luminance provided in the center of the intermediate luminance region; determining a low-luminance-region input/output characteristic curve on the basis of the acquired black-side intermediate luminance distribution, the low-luminance-region input/output characteristic curve passing through a reference point, in the reference input/output characteristic line, determined in accordance with the reference luminance and through a minimum luminance point of the reference input/output characteristic line; and executing image correction on input image data having a luminance which is lower than the reference luminance on the basis of the determined low-luminance-region input/output characteristic curve.

Abstract: An image correction circuit includes: a region determining means for determining an intermediate luminance region in each image frame on the basis of the description of input image data; a luminance distribution acquiring means for acquiring a luminance distribution of input image data in the determined intermediate luminance region in each image frame; a determining means for determining an input/output characteristic line in each image frame by adaptively changing a predetermined reference input/output characteristic line on the basis of the acquired luminance distribution of the intermediate luminance region, the input/output characteristic line defining the substance of image correction on input image data; and a correction executing means for executing image correction on input image data on the basis of the determined input/output characteristic line.

Abstract: An image forming apparatus includes a tone correction storage unit that stores a plurality of tone correction charts for correcting tone of image data; a determination unit that determines characteristics of the image data; a selection unit that selects a tone correction chart suitable for the image data from the plurality of tone correction charts stored in the tone correction storage unit; a chart print unit that prints the tone correction chart selected by the selection unit on a sheet; a receiving unit that receives an adjustment value inputted based on the tone correction chart printed by the chart print unit; a tone correction unit that corrects tone of the image data based the adjustment value; and a print unit that prints out the image data after correcting tone of the image data.

Abstract: An image forming apparatus including a scanning unit to scan an image and to output corresponding digital color coordinates; a determining unit to determine a local color gamut including the digital color coordinates, based on a reference matrix computed from a standard color gamut, which includes the local color gamut, and the plurality of digital color coordinates; a matrix selecting unit to select a color conversion matrix that corresponds to the determined local color gamut; and a computing unit to compute LAB color coordinates based on the selected color conversion matrix and the digital color coordinates. A method of color conversion using the image forming apparatus is also provided.

Abstract: This invention relates to a conversion table compression method of compressing a conversion table and storing the conversion table in a storage medium, including an axial difference creating step of creating an axial difference table by calculating, from data stored in the conversion table, the difference values between grid points adjacent in predetermined directions along a plurality of axes which define the input space of the conversion table, a compressing step of compressing the axial difference table to create compressed data, and a storing step of storing the compressed data in a recording medium.

Abstract: An image reading apparatus includes a timing predicting unit that predicts a reading-start-timing by detecting a front-end and predicts a reading-end-timing by detecting a back-end, an image reading unit that generates density data, a line density data classification unit, a first, second and third specific density data storage units, a determination unit that determines whether or not a foreign substance is attached to a reading position, and a peak density position specifying unit.

Abstract: A display drive circuit of the invention has: an initial-color-gamut-apex-coordinate-storing unit capable of storing initial color gamut apex coordinates; a user-target-color-gamut-apex-coordinate-storing unit capable of storing user target color gamut apex coordinates; a saturation-expansion-coefficient-deciding unit for deciding expansion coefficients of saturation data based on the initial and user target color gamut apex coordinates; and an expansion unit for expanding saturations of display data based on the saturation expansion coefficients. The expansion coefficients of saturation data are decided based on the initial and user target color gamut apex coordinates, and saturations of display data are expanded according to the expansion coefficients. Thus, the degree of expanding the saturations can be controlled for each color gamut or each of R, G and B color properties of an LC display panel.

Abstract: Machine-enabled methods of, and devices and systems for, encoding color bitmap data as indexed red-green-blue (RGB) data for printing and optional multi-functional peripheral (MFP) device raster image processor (RIP) bypass.

Abstract: A tandem continuous paper printer includes: a first printer engine; a second printer engine; and a printer controller; and performing tandem printing by performing printing using the second printer engine on a paper that has been printed on by the first printer engine, the tandem continuous paper printer being arranged so that the first printer engine is made to print tandem check marks on the paper at check page intervals and the second printer engine is provided with a sensor detecting the tandem check marks.

Abstract: An information processing apparatus acquires communication setting information for communicating with an image processing apparatus by a second communication unit via a first communication unit. In accordance with the acquired communication setting information, communication by the second communication unit is established to execute, via the second communication unit, an image processing service provided by the image processing apparatus. When establishment of communication is detected, an operation window display request for executing the image processing service is transmitted via the second communication unit. The image processing apparatus receives the operation window display request from the information processing apparatus via the second communication unit. In accordance with the received operation window display request, an operation window for executing the image processing service is displayed.

Abstract: The present invention provides an image processing device, a color correction table generation device, a display device, an image processing method, a color correction table generation method, a color adjustment method of a display device, and an image processing program capable of color matching to preferred colors of which excessive emphasis in chroma is suppressed. There are provided a chroma limit setting section for setting a chroma limit based on a optimal color, and a color correction table generation section for generating a color correction table by making a correspondence between an input color and an output color having chroma no greater than a chroma limit. The color correction table is stored in a color correction table storage section. The color correction execution section executes color correction along the color correction table so that the projector outputs a color with chroma no greater than the chroma limit.

Abstract: Provided is a method for automatically determining an error of a user operation or a calorimeter caused when the calorimeter is manually slid to measure the colors of color patches on a row-by-row basis. Also provided is a method capable of determining an error or a scanning direction using a feature value obtained from the calorimetric values without using fixed reference and threshold values for each patch.

Abstract: Systems and methods are provided for processing at least one document comprising color data. Color data in the document in a first color space is inspected to determine if a color space conversion operation for a portion of the color data is specified using a color space dictionary or a transformation matrix, wherein the color space conversion operation converts the color data from the first color space to an intermediate standard color space. An input profile corresponding to the color conversion operation is generated, wherein the input profile comprises information to convert color data from the first color space to the intermediate standard color space; and color space conversion operations are performed on the color data using the generated input profile to convert the color data from the first color space to the intermediate standard color space.

Abstract: Disclosed are color management methods and systems to adaptively tune colors for one or more image marking devices. Specifically, exemplary embodiments include methods and systems to create profiles for preference color matching. For example, Lab values associated with target node colors can be warped using a predefined function for special regions of interest.

Abstract: In an image processing for printing a monochrome image, color deviation can be suppressed to print a favorable monochrome image. Specifically, the printing of a monochrome image is performed by using black ink in all of a color reproduction region (color gamut) including a gray axis and regions other than the gray axis. This avoids the use of C, M, and Y for the expression of the monochrome image to suppress the color deviation due to slight imbalance among amounts of three colors of inks.

Abstract: A noise removing filter removes noise from an input image and an edge component extracting unit extracts edge components. The edge components are extracted by calculating a difference between the input image and a smoothed image, which is obtained by smoothing the input image in a smoothed image generating portion. An edge component comparing unit compares the extracted edge components with a threshold value and a sum calculating unit calculates the sum of the edge components greater than the threshold value. A control circuit determines the enhancement degree of the edges based on the sum and averaged luminance of the input image calculated by an average luminance calculating unit. An enhancement degree adjustment unit adjusts the determined enhancement degree, and an edge component enhancement unit enhances the edge components based on this enhancement degree and adds it to the input image to perform edge enhancement processing.

Abstract: A method for compensating for color variations introduced by printer hardware limitations and other factors is described. First, for each printer model or each individual printer, the extent of color variation throughout a printed page is determined. Based on this determination, each page is partitioned into a plurality of image areas. Then, in an actual printing process, the page of image is printed in a multi-pass process where each image area is printed in a separate pass. The digital image data is shifted and/or rotated for each pass, and the paper is shifted and/or rotated correspondingly, so that the different image areas printed in different passes form a complete image on the final printed page. From the standpoint of the pointer hardware, all passes involve printing the same area of a physical page, resulting in reduced color variation across the page.

Abstract: The present invention provides non-linear tone mapping apparatus and method and a computer readable medium stored thereon computer executable instructions for performing the method. The non-linear tone mapping apparatus according to the present invention comprises a luminance value computing unit for computing a luminance value of each pixel of an object image using an image information of each pixel; a computing unit for computing a light adaptive value of each pixel using the image information and luminance value of each pixel, the light adaptive value representing the degree of response to brightness of the image in the image information of each pixel; and a converting unit for converting the image information of each pixel of the object image using a ratio of the image information of each pixel to the light adaptive value.

Abstract: For sharing, as a second profile for a second output device, a known first profile for converting input device-dependent image data into first output device-dependent image data by performing a pre-gradation converting process, a color converting process, and a post-gradation converting process on the input device-dependent image data, a differential between a one-dimensional gradation conversion curve of a first color image output device and an inverse conversion curve of a one-dimensional gradation conversion curve of a second color image output device is determined by a differential generator, and then the first profile and a differential table are used as the second profile for the second color image output device.

Abstract: A printer prints all print data when an inverted print mode is selected for printing even if an insufficient memory state occurs in the image conversion buffer. If the roll paper printer 1 is set to the inverted print mode and an insufficient memory monitoring unit 23 detects an insufficient memory state in the image conversion buffer 13 before the inverted image data generating unit 22 converts and writes all of the received print data to a print data break to the image conversion buffer 13, the print mode switching unit 25 changes the print mode from the inverted print mode to the normal print mode, and the normal printing unit 26 prints the print data from the beginning. Because the print data is printed from the beginning when the inverted image data cannot be correctly generated because of insufficient memory, there is no loss of information contained in the print data.

Abstract: A texture processing unit 54 carries out texture processing on data of a plurality of pixels selected by a processing object selection unit 53 using the same brush stroke pattern and respective colors of the pixels. A hatching processing unit 55 carries out hatching processing of adding diagonal expression substantially perpendicular to the orientation of the stroke pattern on data of an area of low luminance (i.e., dark) pixels from among the image data including YUV components using the respective colors of the pixels. The composition unit 56 carries out composition processing of compositing the image data outputted from the hatching processing unit 55 with the image data outputted from the texture processing unit 54.

Abstract: Methods and apparatus for achieving color and luminance uniformity in color output devices. In one embodiment, measurements of luminance and chrominance are taken at various regions of the display surface for a range of color inputs. Using the collected data, a color volume is formed for each of the measured regions. This color volume comprises a set of all colors producible at the measured region. The color volumes for each of the measured regions are then used to generate a common color gamut, i.e., a volume of colors that are producible in each of the measured regions. A gamut mapping can then be performed for all or a portion of the positions on the display surface to a target color gamut. Input data for the gamut mapping process may be determined by conventional interpolative techniques.

Abstract: A facsimile apparatus includes one or a plurality of connecting portions configured to connect an external storage, a communication portion having a plurality of different facsimile lines, a line specifying portion configured to specify a facsimile line which received data, a detecting portion configured to detect that an external storage is connected to the connecting portion, and a control portion configured to store the data received by a predetermined facsimile line in an external storage connected to the connecting portion in cases where a facsimile line specified by the line specifying portion is a predetermined line and a connection of the external storage is detected by the detecting portion.

Abstract: An image processing apparatus handling combined data including read data from a scanner and written data written by a touch pen, capable of performing appropriate color conversion both on the read data and written data is provided. When a display image obtained by combining the read data and the written data is to be printed, the image processing apparatus executes first image processing on the read data, and second image processing on the written data, respectively. By an image forming apparatus, the combined data including the read data and the written data, which have been appropriately color-converted by respective image processing, is printed.

Abstract: Color compression processing capable of sufficiently maintaining a visual constant hue property even after the color compression processing is realized. There is provided a method for generating a profile used to convert a color of a first color reproduction range into a color of a second color reproduction range. The method includes dividing each of the first and second color reproduction ranges into a plurality of regions, performing color space conversion for individual regions in accordance with color space definitions unique to the individual regions, and generating a profile used to convert the color of the first color reproduction range into the color of the second color reproduction range based on color coordinates obtained through the color space conversion performed for individual regions.

Abstract: A color correction method is provided. Grey values of three primary colors of an image data are transformed into initial characteristic values in a color space. Three sets of characteristic values of a to-be-corrected apparatus when the apparatus displays the primary colors respectively are measured. The characteristic values of the image data are transformed into a set of adjusted brightness values of the primary colors according to the characteristic values and a color space transformation equation. Gamma curves of the apparatus when displaying the primary colors are measured and modified to generate new grey-value vs. brightness relationships for the primary colors, so as to obtain adjusted grey values of the primary colors corresponding to the adjusted brightness values.

Abstract: The present invention is to provide methods and apparatuses for creating color conversion definition to make the same output result appear without any uncomfortable feeling when a same output result is observed under different illumination lights. To achieve this, the method comprising the successive steps of: (a) assuming an observational environment under an illumination light in which a difference in color appearance of an output result of the image output device in a plurality of observational environments with different illumination lights to observe the output result is made less; (b) determining measured color values of a device color of the image output device in the observational environment under the illumination light in which a difference in each color appearance is made less; and (c) creating a color conversion definition on the basis of the measured color values of the device color of the image output device determined at step (b).

Abstract: A color gamut mapping maps an input image signal which has input pixel colors defined by an input luminance and an input chromaticity into a mapped image signal which has corresponding mapped pixel colors defined by a mapped luminance and a mapped chromaticity for a display. The input pixel colors lie within the input color gamut different than the display color gamut. The desired mapped luminance may be retrieved by looking up stored desired luminance values in a look-up table at the mapped chromaticity, or by calculating a relative to white luminance, or a luminance decrease, etc.

Abstract: In a first embodiment, a display system comprises a display panel with 4 or more colored subpixels. The display system receives input image data specified in a first color space and outputs image data specified in a second color space. The display system further comprises a gamut mapping module for mapping the input image data specified in the first color space to image data specified in the second color space. The gamut mapping module clamps out-of-gamut colors using at least a first clamping system and a second clamping system. The first and second clamping systems yield first and second clamped values. A weighting module produces a resulting clamped value from the first and second clamped values. A final output image value is derived from the resulting clamped value. Other embodiments of the display system include pre-reduction modules and adjustable GMA modules.

Abstract: An image processing apparatus includes a first print information receiving unit for receiving first print information including image data and color information, a color conversion parameter generating unit that generates a color conversion parameter for converting a color signal of the image data to a color signal of a color space fixed in advance, based on the color information included in the first print information, and a second print information transmitting unit that generates second print information by adding the color conversion parameter to the first print information. Also disclosed is an image processing method.

Abstract: A print defect management device that supports job-specific print defect management automatically assesses print job pages to determine the severity of image quality defects likely to occur on one or more selected printers. Views of identified troubled pages may be rendered to include approximations of color and image quality defects based on the original page image data, and each printer's color rendition data and defect data, thereby allowing troubled pages for one or more selected printers to be viewed prior to printing. Suggested changes may be automatically or manually applied. Once satisfied with the image quality of print job pages rendered for a specific printer, a user may submit the print job to the same printer, thereby assuring that the user's image quality expectations are met in the printed product. The device may support job-specific print defect management with both local and/or remote printers via LAN, WAN and/or Internet based connectivity.

Abstract: One-dimensional color transforms are automatically calculated by identifying at least one device-independent color space curve, at least one device-dependent color space curve and at least one association amongst the curves. Depending on the motivation for creating the one-dimensional transform, different curves, associations and calculations can be used to generate the transforms without obtaining additional device measurements or iteratively adjusting transform values.

Abstract: A first image-data processing unit unifies characteristics of input image data so that the image data is usable in an image writing unit and an external device, stores characteristic-unified image data in a storing unit, and changes an attribute of supplemental information according to an image input condition. When converting target image data into image data with characteristics suitable for outputting to the image writing unit and an external interface unit, a second image-data processing unit makes the stored image data be reusable in the image writing unit and the external device by performing an image processing based on the supplemental information.

Abstract: A method includes dividing an input range of color values of a first color space into a plurality of sub-ranges, wherein at least one of the sub-ranges comprises an over-range color value. The method also includes determining for each sub-range a level of accuracy in converting color values within each sub-range. The method further includes determining a processing step to be applied to input color values in each sub-range based on the determined level of accuracy.

Abstract: This invention is directed to a method capable of performing appropriate under color removal in image original reading. According to this method, under color removal of the original is performed as follows. A printing medium without any printed image is read by primary and complementary color readings. A brightness signal distribution is generated by converting, using a provisional table, each of image data generated by the reading methods. The lowest one of signal levels is selected from each of the distributions. In correspondence with each of the primary and complementary color readings, a conversion table is formed, which converts the image data to make a pixel value corresponding to the selected lowest one of the signal levels to a value representing white. Under color removal of the image data is performed using a corresponding conversion table in accordance with the reading method of the image original.

Abstract: A transfer method for transferring data between a digital still camera and a printer in direct communication with each other. The digital still camera stores an image file of an input image and a conversion file including conversion information for carrying out color conversion in a preset color space common to both the digital still camera and the printer. The method includes a first transfer step of transferring from the digital still camera to the printer the conversion file and a second transfer step of transferring the image file from the digital still camera to the printer. The printer carries out color conversion of and outputs the image of the image file transferred in the second transfer step using the conversion information included in the conversion file transferred in the first transfer step.

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: In a color reproduction system for displaying an image subjected to color conversion processing by a server side system on a monitor device of a user side system, the server side system comprises a first storage unit for storing a multi-spectrum image, a second storage unit for storing color reproduction characteristic information, which is information relating to a color reproduction characteristic when the image is displayed on the monitor device, a server side communication unit for receiving the color reproduction requirement information transmitted from the user side communication unit via the network, and a color conversion processing unit for obtaining, from the second storage unit, color reproduction characteristic information corresponding to the color reproduction requirement information, and performing color conversion processing on the multi-spectrum image on the basis of the obtained color reproduction characteristic information.

Abstract: A color signal processing apparatus includes a total amount calculating unit, a limit value calculating unit and a correcting unit. The total amount calculating unit calculates a total amount value of an input color signal in an output device color space which has, as color components, colors of coloring materials used in an output device. The limit value calculating unit calculates a limit value for limiting a total amount of a color signal, in accordance with the calculated total amount value. The correcting unit corrects the input color signal in the output device color space so that the total amount value of the input color signal becomes the calculated limit value or less.

Abstract: Color production with high chroma in a low lightness portion is realized by using an appropriate complementary color ink to a particular color ink reproducing the low lightness portion. More specially the device secondary color G-K is reproduced with ink of the pure color component composed of the color mixture of the particular color G ink and the basic color Y ink to tone the particular color G ink. In addition, as complementary color components, the particular color R ink and K ink are used. Thereby, the reproduction line is substantially linear from the device secondary color G point to the device K point. In color reproduction at the dark portion of the color on the G-K line, sufficient chroma can be obtained.

Abstract: A color processing device includes a color range conversion component, a control component and a color conversion and clipping component. The color range conversion component performs a color range conversion of input color signals in accordance with a specified color range conversion condition. The control component excludes from objects of the color range conversion by the color range conversion component a color value, of the input color signals, of which a position in a predetermined color space is outside a color reproduction range and which satisfies a predetermined condition. The color conversion and clipping component, after a color space conversion, applies clipping to a color value that falls outside the color reproduction range of the designated device in the color space dependent on the designated device, including rounding off such that the color value falls in the color reproduction range.

Abstract: An image processing system includes an acquiring unit configured to acquire image data; a first determination unit configured to create histograms of colors in the acquired image data, and determine deemed background colors with the use of the histograms; a second determination unit configured to determine a background color based on the deemed background colors; a counting unit configured to count a number of pixels corresponding to character colors in the image data, wherein colors other than the background color are the character colors; and a deciding unit configured to obtain a ratio of the number of pixels corresponding to the character colors to a total number of pixels in the image data, and perform blank page determination on the image data by determining that the image data is blank when the ratio is less than a predetermined value.

Abstract: An image processing apparatus, an image processing method, and a program thereof, and a display device are provided, in which reproduction of a secret image from one dispersed image is difficult. A secret image and a reverse image included in at least two types of images are in a relationship of forming image data of an image not correlated with the secret image when luminance values of image data respectively are added pixel by pixel.

Abstract: An image processing device includes a determining unit that determines whether an intermediate parameter that is newly computed by an intermediate parameter computing unit or an intermediate parameter that is previously stored in an intermediate parameter storing unit is to be supplied to a color correcting unit depending upon an image forming condition. The color correcting unit performs color correction based on the intermediate parameter.