Abstract: Transfer functions are often used for image processing. Look-up tables can be used to implement transfer functions in a processor-efficient manner. In one embodiment, the invention is an apparatus that includes a look-up table (LUT) storing sample outputs from an output range of a transfer function, the sample outputs corresponding to sample inputs from an input range of the transfer function, the sample inputs being distributed so that more sample inputs are associated with a first region of the transfer function than a second region of the transfer function; and an address module to calculate an index into the LUT based on image data. In one embodiment, the apparatus uses the LUT to process the image data.

Abstract: In order to correct image files to be printed in a printing device, there is provided a printing device including: an inputting unit that is configured to be capable of inputting an image file representing a motion image; a generating unit that is configured to extract a plurality of frame images from the image file and to generate a first output image in which the plurality of extracted frame images are laid out on a single page; correcting unit that is configured to correct the first output image and to generate a first corrected output image; and a printing unit that is configured to be capable of printing the first corrected output image.

Abstract: An optical writing control apparatus controls a light source to draw a correction pattern for correcting a parameter value of an image forming mechanism, detects the correction pattern transferred onto a conveyance member from a photosensitive member based on an output signal of a sensor, and corrects the parameter value based on the detected correction pattern; stores chromatic color progress information indicating a progress for a chromatic color mechanism corresponding to a chromatic color image occurring from when the correction operation was carried out and achromatic color progress information indicating a progress for an achromatic color mechanism corresponding to an achromatic color image occurring from when the correction operation was carried out; and stores a necessary threshold to determine that the correction operation is necessary and an unnecessary threshold to determine that the correction operation is unnecessary for the chromatic color progress information and the achromatic color progress i

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: Disclosed is a color adjustment method for each of image forming apparatuses, including: a gradation pattern creation step of forming a gradation pattern image including patches different in gradation for each of colors in n pieces of coloring materials; a density detection step of detecting densities of the respective patches, and obtaining density information; a gamma curve creation step of associating the density information of the respective patches in a second image forming apparatus with that in the first, and creating a gamma curve correcting a gradation of received image data so as to obtain densities of the respective patches in the first image forming apparatus; and a color adjustment step of extracting respective color components, deciding output values based on the gamma curve corresponding to the second image forming apparatus, creating output image data, and forming an image on a sheet in the second image forming apparatus.

Abstract: An image processing apparatus includes an integer-part converting unit configured to convert multi-level image data into integer image data by referring to a first conversion table, a threshold setting unit configured to generate matrix data for performing area coverage modulation by referring to the multi-level image data, a decimal-part converting unit configured to convert the multi-level image data into decimal image data by referring to a second conversion table, a level reducing unit configured to reduce levels of the decimal image data by using a threshold generated in the threshold setting unit, an adding unit configured to add the integer image data to the level-reduced decimal image data and outputting a result of addition as gamma conversion image data, and an image processing unit configured to perform image processing on the gamma conversion image data.

Abstract: In image processing according to the prior art, the important part of photographic image data (referred to herein as the object) could not be determined and therefore required human participation. A computer 21 which is the core of image processing calculates an edginess which is an image variation from a differential value of data for adjacent picture elements in a step SA110, and determines object picture elements by selecting only images with a large variation in steps SA120, SA130. As optimum parameters for contrast correction and lightness compensation are calculated from image data for object picture elements in steps SA310-SA330, image processing indicators based on object picture elements are determined, and optimum image processing can be performed automatically.

Abstract: A color conversion device generates color data in a second color gamut based on first converted color data and input color data, which are obtained from input color data in a first color gamut, and outputs the color data in the second color gamut. The color conversion device includes a first color mapping unit which generates the first converted color data by mapping the input color data into the second color gamut; a color mixing unit which generates color data by mixing the first converted color data and second converted color data at a ratio corresponding to the first color gamut and the second color gamut; and a color data output unit which outputs the color data.

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 inspection apparatus that compares a reference image with an inspection image obtained by scanning a printed medium on which the reference image has been printed, to determine whether the printed medium is acceptable is provided. The image inspection apparatus includes a first inspecting unit that compares the reference image exclusive of an edge in the reference image with the inspection image exclusive of an edge in the inspection image to perform inspection; a line-image detecting unit that detects a line image that contains the edge from each of the reference image and the inspection image; a second inspecting unit that compares the line image detected from the reference image with the line image detected from the inspection image to perform inspection; and a determining unit that determines whether the printed medium is acceptable based on results of these inspections.

Abstract: A color compensation apparatus, a color compensation method, an image forming apparatus, and a computer readable recording medium are provided. The color compensation apparatus includes a color scheme analyzing unit to classify an input image into one or more objects and to compute average color values for each of the classified one or more objects, a storage unit to store a color table proposed for color compensation, and a color compensating unit to compensate the average color values computed for each of the classified one or more objects using colors of the stored color table which match the computed average color values.

Abstract: There is provided a method of changing a theme for a user interface of a computer system comprising receiving an identification of an image with which to define a color palette of a theme for rendering elements of a user interface on a color display of the computer system; analyzing the image to determine at least one predominant color; and defining the color palette in response to the analysis. The image may comprise a background image selected by a user for display by the computer system. Dynamic generation of the color palette matches the user interface to colors to provide flexible and appealing themes. A computer readable memory having recorded thereon instructions to carry out this method is also provided, as well as a device comprising such memory.

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 color processing method which sets viewing conditions easily and properly from shooting conditions added to an image. Shot image data and shooting conditions of the image data are obtained. Input side viewing conditions from the obtained shooting conditions are set. The image data with a color appearance model based on the set input side viewing conditions are converted.

Abstract: Methods and a system for a natural language control interface are provided to enable a user to modify colors in a digital image. A textual interface is provided to select a color to be modified within the image and a direction of change for the modification. A swipe interface is provided to select a magnitude and polarity for the modification. Actions on the textual and swipe interface are converted to natural language commands which are in turn used to derive a color transformation that is applied to relevant portions of the image to yield a modified image. The modifications are displayed in real time for a user to observe as they are inputted.

Abstract: Disclosed is an image processing system, comprising: an image processing apparatus to output image data based on an input of a print job; and an image forming apparatus to form an image based on the image data, wherein the image processing apparatus comprises a first control section to output color adjustment data so as to perform a gamma adjustment for the image data, and wherein the image forming apparatus comprises an adjustment section to perform the gamma adjustment for the image data based on the input color adjustment data.

Abstract: What is disclosed is a novel system and method for determining a printer metric in terms of image quality (IQ) over a large complex set of conditions based upon measurements taken over a small simple set of conditions while compensating for printer drift. The present system and method effectively utilizes a predictive model that predicts noise measurements of multi-separations from those of single-separation colors and/or a subset of the multi-separations. Because a model is used to comprehend the metric over the entire gamut, the number of patches is reduced. This reduction enables the method to be used within a machine to dynamically characterize the device's image quality metric. Various embodiments have been disclosed.

Abstract: A system/method of color match assessment for electronic documents includes receiving digital data defining a composite electronic document including a raster image object having an edge and a color graphics object bordering the edge of the raster image object. The pixel color values defining the edge of the raster image object are processed to estimate a local color variance of the pixel color values. The local color variance is used to determine if the edge can be color matched to the bordering color graphics object. If the edge can be color matched, a match color for the edge is derived. The match color is associated with the digital data defining the electronic document so that a downstream object color match system can use the match color as needed.

Abstract: A user interface system determines image display presentation characteristics using a displayed image parameter selection control providing image parameter selection data, responsive to the received cursor command data. The displayed image parameter selection control includes a shape having an origin and one or more different sectors associated with one or more corresponding different sets of parameters determining image color or grayscale characteristics and a linear element lying along a line from the origin to a perimeter of the shape and being rotatable about the origin, (a) within a sector to select a value within a range of values determining a first image display characteristic and (b) between sectors to select one of the different sets of parameters determining image color or grayscale characteristics. A display processor initiates display of an image having display presentation characteristics determined by the image parameter selection data.

Abstract: An image processor includes a reduced image forming unit, a first reflectance value calculating unit, a normalizing parameter determining unit, a second reflectance value calculating unit, a normalizing unit, a correcting unit, and a reducing information determining unit. The reduced image forming unit reduces an original image to form a reduced image. The first reflectance value calculating unit calculates a first reflectance value for each reduced pixel. The normalizing parameter determining unit determines a normalizing parameter based on a distribution of the first reflectance values. The second reflectance value calculating unit calculates a second reflectance value for each original pixel. The normalizing unit normalizes the second reflectance values based on the normalizing parameter to obtain normalized Retinex values. The correcting unit corrects the original pixel values based on the normalized Retinex values.

Abstract: A gamut mapping mode is input in accordance with a user instruction. A color gamut of an output device is obtained. A moving range of a focal point is set in accordance with the gamut mapping mode. Gamut mapping is performed based on the color gamut of the output device and the moving range of the focal point.

Abstract: The image forming apparatus includes first and second reading portions which read images of first and second faces of an original, an image forming portion which forms an image on a sheet based on image data read by the reading portions, a calculation portion which calculates difference between respective image data, a correction portion which calculates correction data to decrease difference of the image data based on the image data difference, and a control portion which controls the image forming portion so that an image for correction to correct the reading accuracy difference is formed on a sheet based on the correction data; and the calculation portion calculates difference between respective image data when the image for correction formed on a sheet is respectively read by the first and second reading portions, and the correction portion recalculates correction data based on the image data difference calculated by the calculation portion.

Abstract: An apparatus includes a gray converter to convert an inputted color image to be printed into a gray conversion image and to outputs the gray conversion image a difference calculator to calculate a at least one difference value between at least one color channel image with respect to the color image and the gray conversion image; and a gray reviser to revise the gray conversion image based on the at least one difference value and to output a gray conversion image.

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: The color processor includes: a conversion source color data acquiring part acquiring a conversion source color dataset in a first color space; a color data pair acquiring part acquiring color data pairs each composed of color datasets in the first and second color spaces, the color datasets being used to calculate a color conversion characteristic model; a color conversion characteristic model calculator assigning weight to the color dataset in the first color space, according to a color difference distance from the conversion source color dataset, and calculates the model by use of color data pairs each including a weighted color dataset in the first color space; and an evaluation value calculator calculating an evaluation value indicating an evaluation on influence of the color data pairs on color conversion accuracy of the model. The color conversion characteristic model calculator adjusts the weight according to the evaluation value, when calculating the model.

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: 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: A general framework for adaptive gamut mapping is presented in which the image is first decomposed in two bands, one containing the local means, the other the local variations. Two spatial and color adaptive gamut mapping algorithms are introduced. Based on spatial color bilateral filtering, they take into account the color properties of the neighborhood of each pixel. Their goal is to preserve both the color values of the pixels and their relations between neighbors.

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: 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: Systems and methods of providing user-selected color characteristics for an LCD device to a host system are disclosed. An exemplary method includes receiving user input at the LCD device, the user input specifying color information for each of a plurality of color presets selected by the user. The method also includes each time the user changes color information for each of the plurality of color presets selected by the user, merging the color information with static information for the LCD device. The method also includes communicating the merged color information and static information to the host system in a standardized format.

Abstract: A controller unit controls an image processing apparatus that includes a scanner unit that acquires image data by scanning an original. The controller unit includes a scanning characteristic correcting unit that converts the image data acquired by the scanner unit into normalized image data, an expanded I/F unit to which a controller image processing unit can be detachably attached to perform an image reducing operation on the normalized image data, and a basic image processing unit that, when the controller image processing unit is not attached to the expanded I/F unit, performs a basic image reducing operation on the normalized image data.

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: 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: The present invention relates to a gamma data generation method of a display device. In the method, gamma data including red gamma data, green gamma data, and blue gamma data is determined. A target luminance and a target color coordinate of a first reference gray are determined. Then, an image is displayed on a display device based on red, green, and blue input image signals for a first reference gray, and a first luminance and a first color coordinate from the image are measured. Then, it is determined whether a coordinate difference between the first color coordinate and the target color coordinate and a luminance difference between the first luminance and the target luminance are in an allowable error range or not.

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: A method for color grading within a component color space associated with a display includes receiving a source image comprising a plurality of pixels, wherein each pixel is associated with a color comprising a plurality of color component values in the component color space, wherein the component color space comprises RGB, and wherein a pixel is associated with a color inside a gamut of the display but outside a gamut of a target media, receiving a color grading signal from a user, modifying the color associated with the pixel from the plurality of pixels in response to the color grading signal, to form a graded image comprising the pixel, wherein the pixel is associated with a graded color comprising a plurality of color component values, displaying the graded image on the display to the user, automatically performing a gamut remapping of the graded color associated with the pixel, to form a gamut remapped image comprising the pixel, wherein the pixel is associated with a gamut remapped color comprising a p

Abstract: An image reading apparatus includes a light emitting unit which emits light to a document, a photoelectric conversion unit which converts a quantity of light reflected from the document into an analog signal, an A/D converter which converts the analog signal to a digital signal, a clock unit which clocks elapsed time from start-up of the light emitting unit, a light-quantity calculating unit which calculates the quantity of light emitted to the document from the light emitting unit on the basis of the clocked elapsed time, a correction value calculating unit which calculates a correction value of the digital signal on the basis of the quantity of light calculated by the light-quantity calculating unit and the digital signal, and a ? correction unit which corrects the digital signal by referring to the correction value calculated by the correction value calculating unit.

Abstract: An image processing method of reproducing an image displayed on a screen of a display unit on a printing medium used by an image forming device includes displaying a preview window on the screen of the display unit, displaying the image in the preview window, and printing the image having the same colors as those displayed in the preview window using the image forming device. In addition, an image processing apparatus usable with a display unit and an image forming device includes a data capture unit to capture data of at least a portion of an image displayed on a screen of the display unit, and a color adjustment unit to convert the image displayed on the screen of the display unit to an image having the same colors as those of an image displayed in a preview window by adjusting the colors of the image displayed on the screen of the display unit based on the image data captured by the data capture unit, and to output the converted image to the image forming device.

Abstract: There is provided a method of changing a theme for a user interface of a computer system comprising receiving an identification of an image with which to define a color palette of a theme for rendering elements of a user interface on a color display of the computer system; analyzing the image to determine at least one predominant color; and defining the color palette in response to the analysis. The image may comprise a background image selected by a user for display by the computer system. Dynamic generation of the color palette matches the user interface to colors to provide flexible and appealing themes. A computer readable memory having recorded thereon instructions to carry out this method is also provided, as well as a device comprising such memory.

Abstract: This application includes devices and methods for processing multimedia data to generate enhanced multimedia data at a receiver based on encoder assisted pre-processing. In one aspect, processing multimedia data includes identifying at least one pixel intensity range in at least one image of multimedia data, modifying at least a portion of the multimedia data to reduce the pixel intensity range, and encoding the modified multimedia data to form encoded multimedia data.

Abstract: An image-capturing apparatus includes an image-acquiring unit which acquires an image that is captured by photographing a photographic subject which is laid on an arbitrary place, a difference image producing unit which produces a difference image between the captured image that is acquired by the image-acquiring unit and an image which is captured before the photographic subject is laid, a contour extraction unit which extracts contour information of the photographic subject from the difference image that is produced by the difference image producing unit, and an image conversion unit which corrects a distortion of the captured image on the basis of the contour information that is extracted by the contour extraction unit.

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: 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: A boot logo processing method includes the following steps. Palette data and a boot graphic including plurality colors are provided, and the colors include corresponding color values respectively in color gamut of the boot graphic. A boot graphic is provided, and it may be composed of plurality colors. When the number of the colors composing the boot graphic is greater than a default value of the number of the colors provided by the palette data, color value of every color is operated with color values of other colors to obtain plurality operating values. Thereby, in the processing method of the invention, part of the colors in the color gamut of the boot graphic are merged into a single color according to the operating values to decrease the number of the colors composing the boot graphic, and produce the boot logo at least according to the latest boot graphic.

Abstract: Displays systems and methods for dithering input image data to reduce quantization errors in a display system include inputting input image data to be rendered by said display system; applying a gamma table to the input image data to create a first intermediate image data; applying a dithering pattern, the dithering pattern comprising a checkerboard pattern, the checkerboard pattern depending upon the subpixel layout of the display. The display system may include a separate gamma table for each input color channel and apply the separate gamma table to perform white point adjustments for the display system.

Abstract: An image processing method is a method for correcting both an image quality of an overall image and an image quality of a partial image with excellent balance.

Abstract: An image sensing apparatus including an image sensor having a first area and a second area and a gradation converter for applying a gradation conversion to an image signal is provided with a gradation conversion LUT storage storing at least two kinds of gradation conversion information. The image sensing apparatus is also provided with a gradation conversion information rewriting section for rewriting the gradation conversion information into new gradation conversion information. There can be provided an image sensing apparatus capable of carrying out a precise gradation conversion even in the case that the inflection point between the first area and the second area of the image sensor constantly changes.

Abstract: The color management module includes a first color converter color-converting color information contained in an image signal having been input according to a three-dimensional LUT; an interpolator generating a synthetic image signal by synthesizing an image signal converted by the first color converter and an image signal having been input in an arbitrary ratio; and a second color converter color-converting color information on the synthetic image signal in the HSV space and outputting the color information.