Abstract: A method for adjusting the color of images is provided. In the method, firstly, an original hue-saturation-value (HSV) color coordinate is obtained from an original image signal. Next, the original HSV color coordinate is converted into an adjusted HSV color coordinate according to color adjusting data. Afterwards, the adjusted HSV color coordinate is converted into a corrected HSV color coordinate. Then, an output image signal is generated according to the corrected HSV color coordinate.

Abstract: Determination of a grid structure for a set of values in a device color space, in which heuristics are applied to a collection of color sample data in order to determine the structure of a look-up table that best fits the samples. Sampling data is sorted for each channel thereof, and the number of steps in each channel is counted. The data is checked for completeness. Steps are removed if they do not correspond to steps on the axes of a three-dimensional cube. If, as a result of step removal, a full LUT has been obtained, then the structure of the LUT has been determined and the process ends. On the other hand, if a full LUT has not been obtained, then steps are removed if they are under-correlated with other steps.

Abstract: Technologies are described herein for high-performance rasterization of a vector graphic on a server computer. A vector graphic loader receives the vector graphic and generates an intermediate data structure from the vector graphic. A vector graphic renderer receives the intermediate data structure and renders the intermediate data structure to a render surface. An imaging component encodes the contents of the render surface to a raster image in a standard image format. The vector graphic loader and the vector graphic renderer are configured for multi-threaded and multi-processor execution on a server computer, which provides high performance.

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: A field sequence detector determines the field sequence of a series of fields of video by assessing the vertical frequency content of hypothetical de-interlaced images. Hypothetical images are formed from a currently processed field and an adjacent (e.g. previous or next) field. If the vertical frequency content is relatively high (e.g. above ½ the Nyquist frequency for the image), the hypothetical image is assessed to be formed of improperly interlaced fields, belonging to different frames. If the frequency content is relatively low, the hypothetical image is assessed to be properly assembled from fields of the same frame. The field sequence in the series of fields may be detected from the assessed frequency content for several of said series of fields. Known field sequence, such as 3:2 pull-down, 2:2 pull down, and more generally m:n:l:k pull-down sequences.

Abstract: A system is configured to calculate an evaluation index of sample ink amount data from a color difference evaluation index and an image quality evaluation index and create a profile on the basis of a sample with a high rating value. When the image quality evaluation index is predicted, the image quality evaluation index corresponding to any sample ink amount data is estimated based on a profile produced on the basis on actual evaluation. A printer driver is configured to create a plurality of profiles by using different indices in this system and to perform color conversion by using the plurality of profiles. The plurality of profiles are appropriately selected according to the user's needs, printing conditions, and type of printing object image.

Abstract: The management of color presented at end point devices such as a display or printer is based on the implementation of a Color Management Resource (herein also CMR). A CMR is an architected resource stored accessibly to a print server or other processor that is used to carry all of the color management information required to render a print file, document, page, or data object. The invention here described is particularly focused on a color conversion type of CMR and defines a new type here called a Link Color Conversion CMR. In particular, a unique descriptor is tied to each input and output color conversion rule. A linked color conversion rule, created by combining the input and output color conversion, is created. The linked color conversion structure contains three parts—the descriptor of the input color conversion rule, the descriptor of the output color conversion rule, and the combined color conversion rule.

Abstract: Generation of an Interim Connection Space (ICS) of a full spectral space is provided. A space of illuminants is accessed, and the full spectral space is decomposed into a first subspace that is an orthogonal complement of a metameric black subspace for the space of illuminants. The Interim Connection Space is generated based on the first subspace. The generated ICS can be used, for example, for rendering an image on an additive color destination device. One image rendering workflow includes accessing color data of the image in an ICS, transforming the color data from the ICS into a device dependent color space of an additive color destination device, and rendering the transformed color data on the destination device.

Abstract: A database methodology that concerns the mapping of any arbitrary object into a plurality of regions, enabling the assignment of multiple region-specific attributes thereto and facilitating the concurrent, graphical presentation of any assigned attributes. Attribute storage, manipulation, and presentation are driven by the individual regions and characteristics of the object.

Abstract: A circuit and method for reducing artifacts in decoded color video and images are disclosed. The circuit includes a buffer for receiving an input pixel in a first color-space, and a detector for determining after transformation into a second color-space, if at least one component of the transformed pixel would fall outside a predetermined range. The determination may be made by comparing components of the input pixel, to corresponding ranges in the first color-space. Upon determining that at least one component of the transformed pixel would be outside a corresponding predetermined bound in the second color-space, the detector causes the circuit to output a pixel in the first color-space, with at least one predetermined component. The output of the circuit may subsequently be converted to the second color-space by an external color-space converter and displayed onto a color display. The method reduces visible artifacts caused by clipping during color-space conversion.

Abstract: A method and system in accordance with the present invention provides a system that allows a portable media player to control settings of portable media player when receiving video from an accessory, to control playback of the portable media player and to provide for navigation between video tracks in a hierarchical fashion. In so doing, a portable media player can then utilize this information to provide for the maximum functionality of the accessory when connected to the portable media player.

Abstract: A color management unit is architected to achieve higher-quality appearance used in various video formats and to enable improvements in picture contrast and colorfulness. The color management unit comprises an optional input color space converter to convert the input digital video to a desired color space, an adaptive contrast enhancer to apply contrast improvement algorithms in response to different scenes in either manual or automatic modes, intelligent color remapping for enhancing selected colors, sRGB compliance to produce a video display that is uniform over different monitors, global color and brightness controls to combine global processing and color conversion, gamut compression to maintain pixel validity in color space conversion, and gamma correction to compensate for nonlinear characteristics of an output display.

Abstract: A device model object which numerically constructs colorimetric measurements based on access to a spectrally-based device profile. In situations where a color management module issues a request for spectral measurements, then the device model object provides spectral measurements directly from the spectrally-based device profile. However, in situations where the color management module issues a request for colorimetric measurements, then the device model object numerically constructs colorimetric measurements based on numerical integration of spectral measurements from the spectrally-based device profile against a viewing condition white point. The constructed measurements are provided to the color management module and they are also cached for possible future use. In this way, the device model object is able to support requests for both measurement-based device profiles and spectrally-based device profiles.

Abstract: Methods and apparatus are provided for calibrating a digital color imaging device to a printing press by determining a total colorant limit, per-channel colorant limits, and channel linearization tables using colorimetric and/or spectrophotometric techniques. In addition, for digital color imaging devices that use multi-hue colorants, methods and apparatus are provided for determining distribution functions for the multi-hue colorants as a function of input values.

Abstract: A system that converts color coefficients between color spaces. During operation, the system receives a color profile comprising a lookup table which defines a conversion of color coefficients between a source color space and a destination color space, wherein the source color space includes a black color channel. Next, the system identifies a darkest output color value in the destination color space produced by the color profile, and also identifies entries in the lookup table corresponding to a maximum possible value for the black color channel of the source color space. The system then updates the identified entries with an achromatic equivalent of the identified darkest output color value, whereby source colors having the maximum possible value for the black color channel are mapped to the achromatic equivalent of the identified darkest output color value.

Abstract: Methods and apparatus for determining a preferred size for a Link LUT as used in conversion from an input color space defined by an input ICC profile into an output color space defined by an output ICC profile. The Link LUT may be incorporated within a device link structure as generally defined in the ICC specification or within a Link Color Conversion CMR in an AFP architecture system. The preferred size is determined from the size of an input LUT associated with the input ICC profile and the size of an output LUT associated with the output ICC profile. In AFP architecture systems, the input and output LUTs and profiles may each be incorporated in appropriate Color Conversion CMRs. The preferred size is determined as a reduced size that requires less computation to generate but does not cause loss of accuracy in conversion between the input and output color spaces.

Abstract: An apparatus and method for converting color data are provided. The method includes generating a CMYK color gamut extended from a CMY color gamut that consists of a cyan (C) colorant, a magenta (M) colorant, and a yellow (Y) colorant, by use of the CMY color gamut and a black (K) colorant; mapping input colors using the generated CMYK color gamut; converting color data of the mapped input colors to CMY data; and converting the CMY data to CMYK data. Accordingly, natural representation and printing of low-lightness colors and high-saturation colors can be attained.

Abstract: For each combination of color material signals corresponding to an input image signal, a total color material use amount is calculated. On the other hand, on the basis of a predetermined target color, total color material use amounts are set which vary smoothly in accordance with a variation in the target color. Then, a determination is made as to which one of all the combinations of color material signals determined as described above corresponds to one of the set total color material use amounts which is the same as the total color material use amount corresponding to the input image signal. This combination is outputted to a printer as the optimum combination of color material signals corresponding to the input image signal.

Abstract: A display apparatus using a light emitting diode (LED) light source is provided. The display apparatus including an input unit which includes at least one shortcut key, a storage unit which stores at least one color gamut profile capable of being expressed by the LED light source, a detector which detects a color gamut profile from the storage unit if the color gamut profile is selected using the shortcut key, a converter which converts image data according to the detected color gamut profile, and an output unit which displays the converted image data using a light beam emitted from the LED light source. Accordingly, a user can easily apply a desired color gamut profile to an image and view the image.

Abstract: An approximate blending search system includes a material information database constituted by accumulating names of a plurality of blending materials and property information codes constituted by a plurality of identification codes to which a plurality of pieces of property information on the blending materials are respectively related, a blending composition database constituted by accumulating names of compositions, names, property information codes, and blending quantities of the blending materials constituting the compositions, a prospective composition search unit for approximately searching a corresponding composition from the blending composition data base in accordance with the measurement data input from the input means and/or at least one or more identification codes of the property information codes in an optical blending material, and a display unit for displaying an obtained search result.

Abstract: Disclosed is color conversion method using a color look-up table. The method includes the steps of: generating a color look-up table using information on the difference of each channel before and after a conversion of each color; and converting the colors using the generated color look-up table. The step of generating the color look-up table includes identifying the maximum difference value among several difference values and generating a first compressed table to initially compress the difference values using the maximum difference value.

Abstract: When there is an object of a color plate which is different than a process color, it is confirmed whether or not Color (n), which corresponds to that color name Spot (n), is a spot color. If Color (n) is a spot color, CMYK value conversion is carried out from a LUT of that spot color, and CMYK values are composed in a region for output. If Color (n) is a process color, CMYK values thereof are stored in a region for CMYK color correction. After color correction is carried out on the CMYK values of the region for CMYK color correction, they are composed with CMYK values of the region for CMYK output. Color information when a color plate different than a process color is included, is generated.

Abstract: A signal processing method comprises the steps of: inputting three signals specifying a color of one pixel; and generating four signals from the input three signals, wherein each of said four signals represents intensities of four different colors to display a color of one pixel by mixing colors, wherein said generating step includes a first converting step of converting the input three signals to two signals representing intensities of two colors among the four colors and a signal representing intensity of a mixed color obtained by mixing (a) the four colors or (b) a plurality of colors among the four colors; and a second converting step of converting the signal representing intensity of the mixed color to a plurality of signals representing intensities of a plurality of colors including at least other two colors different from the two colors.

Abstract: Machine-enabled methods of, and devices for, encoding color bitmap data as indexed red-green-blue (RGB) data for display.

Abstract: A color processing apparatus determines, based on output color gamut information, the color gamut conversion condition for converting the image data so that the color gamut of image data on the predetermined color space may fall within the output color gamut, converts the color gamut of input image data according to the set color gamut conversion condition, determines the limiting condition of the color gamut conversion, changes the color value of the specified color so that the color value of the specified color out of the input image data may be converted into the color corresponding to the output satisfying the limiting condition, and pre-processes so as to change the color value other than the color value of the specified color out of the input image data according to the relation between the color value before change of the specified color and the color value after change.

Abstract: Video conversion using a 3D graphics pipeline of a graphical processing unit (GPU) is disclosed. A plurality of video data formatted in a first video format is accessed from a memory unit. Moreover, the plurality of video data is converted from the first video format to a second video format using a 3D graphics pipeline of the GPU. The plurality of video data formatted in the second video format is sent to the memory unit. The 3D graphics pipeline applies a filtering technique. In an embodiment, the filtering technique is an interpolation technique.

Abstract: A method of gamut mapping includes the steps of defining a mapping function establishing a continuous first derivative of change of at least one color space component from a first color gamut to a second color gamut, and applying the function to first color gamut data for the at least one color space component.

Abstract: The conversion of colors of an image from a source color space to a destination color space, the source color space being represented by a source color space transformation associated with a source color profile, and the destination color space being represented by a destination color space transformation associated with a destination color profile, is provided. Digital values corresponding to colors contained in the image are converted from the source color space to digital values in a device-independent color space, using the source color space transformation. A gamut mapping is determined from a source color gamut to a destination color gamut, by using a source gamut boundary description constructed from a source image profile which is separate from the source color profile, or by using a destination gamut boundary description constructed from a destination image profile which is separate from the destination color profile.

Abstract: A color management unit is architected to achieve higher-quality appearance used in various video formats and to enable improvements in picture contrast and colorfulness. The color management unit comprises an optional input color space converter to convert the input digital video to a desired color space, an adaptive contrast enhancer to apply contrast improvement algorithms in response to different scenes in either manual or automatic modes, intelligent color remapping for enhancing selected colors, sRGB compliance to produce a video display that is uniform over different monitors, global color and brightness controls to combine global processing and color conversion, gamut compression to maintain pixel validity in color space conversion, and gamma correction to compensate for nonlinear characteristics of an output display.

Abstract: A method of determining implied sample areas for each data point of each color in a source pixel data specified in a first sub-pixel format is used for sub-pixel rendering an image on a display specified in a second sub-pixel format. Each of the first and second sub-pixel formats comprises a plurality of colored sub-pixels. The method comprises determining a geometric center of each colored sub-pixel of the first format to define a sampling point; and defining each implied sample area by forming lines that are substantially equidistant between the sampling point of one colored sub-pixel and the sampling point of another neighboring same color colored sub-pixel. A similar technique may be used for determining resample areas for computing color values for rendering an image specified in a first sub-pixel format on a display substantially comprising a plurality of colored sub-pixels arranged in a second sub-pixel format.

Abstract: Disclosed are a method and a system that adaptively transform visual contents inputted from a network, in accordance with the visual characteristics of a terminal user. A visual characteristics descriptor that describes the information of the user visual characteristics in a predetermined format is proposed. The descriptor includes the information of the color vision deficiency type and the color vision deficiency degree. The color vision deficiency may be described in numerical degree or textual degree. The invention adaptively transforms visual contents differently in accordance with the color vision deficiency type.

Abstract: A method of and apparatus for transforming a three color signal into a multi-color signal. A method of transforming a color signal having three color components into a color signal having first through n-th color components, includes: producing a lookup table having signal values of (n-3) of n color components of a color within a three-dimensional color space and reference variables corresponding to the signal values of the (n-3) color components; extracting the reference variables from an input color signal; determining the signal values of the (n-3) color components corresponding to the extracted reference variables from the lookup table; and producing a color signal having n color components using the determined signal values of the (n-3) color components.

Abstract: According to an embodiment of the present invention, selective tristimulus corrections to device-independent coordinates are applied using a piecewise linear correction function. The piecewise linear correction function is defined such that a maximum of the piecewise linear correction function occurs at a boundary condition of a corresponding device-dependent color space, and the piecewise linear correction function is linearly reduced to zero or approximately zero as values in the corresponding device-dependent color space approach either a different boundary condition or a neutral axis. By having the piecewise linear correction function reduce linearly to zero or approximately zero, corrections to one region of color smoothly diminish and blend into the other regions of color, thereby substantially preventing the introduction of artifacts or image corruption due to the corrections.

Abstract: A display system includes a subpixelated display panel having subpixels in two saturated primary colors. In one embodiment, the primary colors are selected so as to be a substantially metameric pair for an achromatic color such as white. Information display efficiencies arise from utilizing a checkerboard arrangement for the two primary colored subpixels and from using subpixel rendering algorithms to render an image on the display. The bichromatic display may display a black and white image combined with a monochromatic image, or may provide the capability to overlay a first image from a first image source carried on a chromatic channel onto a second image from a second image source carried on a luminance channel, where the first image source detects light wavelengths that the Human Vision System is not sensitive to, such as infrared light. This latter embodiment of the bichromatic display system is suitable for night vision devices.

Abstract: Methods, apparatuses, systems, and machine readable media for pixel transformations. One exemplary method includes: determining a state of a pixel format transformation, wherein a pixel format includes a predetermined number of pixel data components and a predetermined number of bits for each of the pixel data components and wherein the state includes a source pixel format and a destination pixel format and at least one intermediate pixel format; converting pixel data in the source pixel format to pixel data in the intermediate pixel format; and converting the pixel data in the intermediate pixel format to pixel data in the destination pixel format. In certain embodiments, a method includes building and compiling a function, at run-time, for the pixel format transformation based upon the state.

Abstract: A method for clearing blur images of a monitor is disclosed. An original image data is provided. The original image data is transformed from an RGB encoded format to a YUV encoded format. The transformation is compressed as the original image data with the YUV encoded format. The compressed original image data is written in a random access memory (RAM) using a predefined method. The compressed original image data is decompressed. The original image data is transformed from the YUV encoded format to the RGB encoded format. The original image data is outputted to a display device using a driving unit.

Abstract: Systems and methods for processing signals are disclosed. The method may include, in a communication device that includes a chip operating to processing video signals, receiving video data from a camera. The received video data may include alternating YUV formatted video data and RGB formatted video data. The received video data may be separated into separate YUV images and separate RGB images. The separate YUV images may be transferred to a first device, and the separate RGB images may be transferred to a second device. The camera may be configured to generate the video data that includes alternating YUV formatted video data and RGB formatted video data. The separate YUV images may be DMA transferred to the first device. A DMA controller may be configured to alternately transfer the separate YUV images and separate RGB images. The alternate transfer via the DMA controller may occur without assistance from on-chip processor.

Abstract: It is an object to provide a semiconductor device in which a correct video signal is inputted into a display regardless of whether a luminance signal and a color-difference signal, or a three-primary color signal of R, G, and B is inputted as a video signal and which is also applied to the case of a digital video signal, and a driving method thereof. The display device includes a display panel, and a video format conversion circuit.

Abstract: A method and system in accordance with the present invention provides a system that allows a portable media player to control settings of the portable media player when receiving video from an accessory, to control playback of the portable media player, and to provide for navigation between video tracks in a hierarchical fashion. In so doing, a portable media player can then utilize this information to provide for the maximum functionality of the accessory when connected to the portable media player.

Abstract: According to one aspect, the invention provides an apparatus for converting data encoded in a graphics signal to at least one output signal. The apparatus includes an input, a plurality of outputs, signal processing circuitry and a controller. The input is adapted to receive the graphics signal where the graphics signal includes a plurality of frames generated at least in part from original data. The signal processing circuitry is adapted to locate, in the graphics signal, data corresponding to the original data, convert the data corresponding to the original data to output data and communicate the output data to the plurality of outputs. The controller is adapted to monitor a capacity of the signal processing circuitry and generate a signal that results in at least one disposable frame being added to the plurality of frames. The signal processing circuitry is adapted to discard the at least one disposable frame.

Abstract: A database methodology that concerns the mapping of any arbitrary object into a plurality of regions, enabling the assignment of multiple region-specific attributes thereto and facilitating the concurrent, graphical presentation of any assigned attributes. Attribute storage, manipulation, and presentation are driven by the individual regions and characteristics of the object.

Abstract: An apparatus and method for automatically analyzing digital video quality are provided. The apparatus for automatically analyzing digital video quality includes a video analyzing unit and a result displaying unit. The video analyzing unit analyzes a texture attribute of an input video and analyzes a color attribute of the input video, thereby obtaining a texture attribute analysis result and a color attribute analysis result. The result displaying unit determines whether a reference video for video quality analysis exists or not. When the reference video exists, the result displaying unit determines the texture attribute analysis result as a main component analysis result and the color attribute analysis result as a minor component analysis result, respectively, and displays the determined analysis results on a screen in a form of numerical values and graphs together with the input video.

Abstract: A method for correcting neutral color shift in a production cartridge for use in an imaging system includes determining a colorant increment data based on a standard cartridge neutral variation signature color data and a standard cartridge neutral sensitivity signature color data associated with a standard cartridge, and based on a production cartridge neutral variation signature color data and a production cartridge neutral sensitivity signature color data associated with the production cartridge, and using the colorant increment data to correct the neutral color shift.

Abstract: Techniques and tools for representing pixel data in a video processing or capture system are described. Described techniques and tools provide efficient color representation for video processing and capture, and provide flexibility for representing colors using different bit precisions and memory layouts. Described techniques and tools include video formats that can be used, for example, in hardware or software for capture, processing, and display purposes. In one aspect, chroma and luma information for a pixel in a video image is represented in a 16-bit fixed-point block of data having an integer and fractional components. Data can be easily converted from one representation to another (e.g., between 16-bit and 10-bit representations). In other aspects, formats for representing 8-, 10- and 16-bit video image data (e.g., packed and hybrid planar formats), and codes for indicating the formats, are described.

Abstract: Techniques and tools for representing pixel data in a video processing or capture system are described. Described techniques and tools provide efficient color representation for video processing and capture, and provide flexibility for representing colors using different bit precisions and memory layouts. Described techniques and tools include video formats that can be used, for example, in hardware or software for capture, processing, and display purposes. In one aspect, chroma and luma information for a pixel in a video image is represented in a 16-bit fixed-point block of data having an integer and fractional components. Data can be easily converted from one representation to another (e.g., between 16-bit and 10-bit representations). In other aspects, formats for representing 8-, 10- and 16-bit video image data (e.g., packed and hybrid planar formats), and codes for indicating the formats, are described.

Abstract: In one embodiment a method includes obtaining a white point correction for a display device and obtaining a chromatic correction for the display device. The method may also include generating corrected color coordinates based on the white point and chromatic corrections. The method may ensure that images that appear on a display device in a soft proofing environment will be visually equivalent to images that appear on print media.

Abstract: A system and method for image acquisition enables selective automated application of color management to color image data generated by an image-capturing device by the device driver for the device. In the image acquisition system, each image-capturing device has properties or operation parameters that can be set to control the operation of the device. During an image acquisition operation, color image data generated by the image-capturing device are transmitted to the device driver. If the operation parameters of the device are set to indicate that color management is to be performed, the device driver calls color management functions provided by the operating system to perform the desired color operation, such as a color space conversion, on the received color image data. The processed color image data are then sent to the image-processing application for further processing or editing.

Abstract: Systems and methods for providing consistent chromatic adaptation to a workflow comprising a number of International Color Consortium (ICC) profiles is provided. In accordance with an exemplary method of the present invention, the profiles within the workflow that require chromatic adaptation are identified. A control profile, whose chromatic adaptation method will be applied to the other profiles identified as requiring chromatic adaptation, is also identified. The chromatic adaptation method of the control profile is determined. The color data of the each profile identified as requiring chromatic adaptation is then converted using the chromatic adaptation method of the control profile such that all profiles requiring chromatic adaptation have been chromatically adapted using the same method.

Abstract: The invention achieves giving high color reproducibility to a color signal with reliability without substantially increasing circuit scale. A signal processing unit of the invention includes a color transformation part which multiplies an inputted color signal by a transformation matrix and an element setting part setting an element group of the transformation matrix according to every inputted color signal. The element setting part comprises an identification unit identifying a color of the color signal, a storage unit storing in advance optimum element groups for a predetermined number of reference signals, and an interpolation unit. The interpolation unit performs interpolation computing based on the input signal, two optimum element groups for two of the reference signals of colors close to a color of the color signal, and color relation between the color signal and the two reference signals to determine an element group to be set.

Abstract: Gamma correction or other power Power functions and other self-similar functions are generated for correcting the light intensity for digital pixels implemented in hardware. Two levels of mapping of segments are preformed to reduce the total number of segments for a given precision. The A range of inputs is divided into successively smaller segments. Two levels of mapping of segments are performed. Each segment is smaller than the next by a factor of 1/a for a first or primary level, or 1/b for a second level of segments. All inputs are mapped of scaled up to the input range of the largest segment in the primary level. Then the largest primary segment is further divided into several second-level segments, and the input is again mapped or scaled into the largest of the second-level segments. Gamma correction The function is performed on the input scaled into the largest second-level segment. A linear approximation within the largest second-level segment is used.