Abstract: A method and apparatus is used for gamut mapping to a printer gamut that includes receiving a narrow gamut, a wide gamut, a printer gamut for printing on a printer and a predetermined mapping between the narrow and printer gamuts, identifying overlapping areas in the wide gamut, the narrow and printer gamuts, determining when the narrow gamut overlaps areas of the wide gamut, utilizing the narrow gamut values when the determination provides overlapping areas of the narrow gamut and the wide gamuts, selecting a wide gamut interpolation point corresponding to the surface of the printer gamut when narrow gamut areas do not overlap the wide gamut according to the determination, selecting a narrow gamut interpolation point by mapping the narrow gamut to the printer gamut and interpolating the narrow gamut interpolation point and the wide gamut interpolation point expanding the narrow gamut values into the printer gamut.

Abstract: A color conversion definition correction apparatus corrects a color conversion definition defining a relation between first color data representative of a color by coordinates on a first color space and second color data representative of a color by coordinates on a second color space in such a manner that a plurality of first color data has a one-to-one correspondence with a plurality of second color data. A smoothing processing is applied to the second color data. A color difference between the reference color set up and a color represented by the second color data subjected to the smoothing processing is determined. The second color data subjected to the smoothing processing is corrected, when the color difference is larger than the reference color difference, in such a manner that a color difference between a color represented by the second color data and the reference color is small.

Abstract: A source driver and a Gamma correction method thereof with lower layout area and preferred Gamma correction performance are provided. The source driver includes a Gamma correction unit, a latch unit, and a digital-to-analog converter (DAC). The Gamma correction unit receives an original image data, and converts the original image data to a corresponding corrected image data. The latch unit is coupled to the Gamma correction unit. The DAC is coupled to the latch unit, so as to convert the corrected image data to a corresponding analog drive signal. In the Gamma correction method, first, a correction unit to correct an original image data to a corresponding corrected image data is provided, and the corrected image data is converted into a corresponding analog drive signal.

Abstract: An image processing apparatus and information processing apparatus and method employs an output profile read-out unit that, according to a region designated by a preference selection unit, reads out one or more regional profiles from output profiles prepared for each such region. An output profile composing unit then combines the one or more output profiles based on a composition ratio input from the preference selection unit. The output profile is then input to a color matching processor for color matching.

Abstract: In one embodiment, a display device comprises a timing controller, a first computer readable memory medium coupled to the timing controller and comprising a first color table, a video processor coupled to the timing controller via a communication link and comprising logic to request the first color table from the timing controller, and use data in the first color table to implement a color correction routine.

Abstract: The disclosed embodiments relate to a system and method that enhance the contrast ratio of a display device. An exemplary embodiment comprises determining brightness level of a brightest object of a video frame, determining a required illumination for the video frame based on the pixel brightness level of the brightest object, obtaining a gamma-corrected pixel adjustment value, applying the gamma-corrected pixel adjustment value to a color value of an input pixel of the video frame to obtain a gamma-corrected pixel value, and displaying the gamma-corrected pixel value.

Abstract: A liquid crystal display (LCD) including an LCD panel and a driving unit is provided. The LCD panel has a red pixel, a green pixel, and a blue pixel. The driving unit is applied for receiving a red data signal, a green data signal, and a blue data signal, and outputting a red voltage signal, a green voltage signal, and a blue voltage signal for driving the red pixel, the green pixel, and the blue pixel respectively. When the red data signal, the green data signal, and the blue data signal all correspond to a specific gray level, the pixel luminance of the blue pixel is lower than the pixel luminance of the red pixel as well as the pixel luminance of the green pixel.

Abstract: Exemplary embodiments of color conversion circuits and color conversion methods convert input color data into output color data. The input color data is positioned in a three-dimensional color space, which is divided into a plurality of unit cubes each having a fixed dimension. The input color data is converted by performing interpolations using conversion coefficients at vertexes of the unit cube within which the input color data is positioned. When the input color data is positioned on a gray axis of the color space, a substitution circuit substitutes some of the conversion coefficients such that the interpolation becomes a linear interpolation. As a result, it is assured that input color data positioned on the gray axis is converted to gray output color data.

Abstract: A compressed pixel level for a pixel in a frame of an image is compared with the (compressed) pixel level for the same pixel in a previous image frame. If the pixel level is unchanged, then the pixel is not moving. An uncompressed pixel level is then used for that pixel in the current image. If the pixel level is changed, then the pixel is moving, and a decompressed, boosted pixel level is used for that pixel in the current image.

Abstract: Color values of a color space are stored in a color correction table. A smoothing process is performed on achromatic color values to remove artifacts and prevent image degradation caused by the correction process. The color values obtained from the smoothing process may also be adjusted for projection onto the achromatic axis.

Abstract: A color compensation method for a display device. A brightness eigenvalue and color gamut eigenvalue of the display device is determined. A plurality of signals of three major colors are applied into the display device to display a plurality of colors. The colors are measured to get a plurality of chromaticity eigenvalues. The brightness eigenvalue, the color gamut eigenvalue and the signals of the three major colors are applied into a formula to establish a color database. A target chromaticity eigenvalue and a data eigenvalue in the color database are applied into another formula to calculate a compensated signal eigenvalue to compensate color difference of the display device.

Abstract: A method and apparatus for interpolating values for a color space from an input color value. A unit hypercube enclosing the input value is generated based on values from a look up table. A set of boundary conditions are then imposed on the unit hypercube. To perform the actual interpolation, an initial barycentric projection is performed from a selected vertex of the unit hypercube through the input value onto a boundary of the unit hypercube. If the projection satisfies one of the boundary conditions, an interpolated value is calculated using the projection by back substitution. If the initial projection does not satisfy a boundary condition, an intermediate value is generated from the previous projection and successive barycentric projections are performed using respectively different vertices of the unit hypercube through intermediate values onto a boundary of the unit hypercube until a projection satisfies one of the boundary conditions.

Abstract: A system and method for processing a gray level in a display device performs a random error diffusion operation on the video data using a first random coefficient value and a random dithering operation on the error-diffused video data using a second random coefficient value.

Abstract: An image display device which displays a multiband image acquired by a multiband camera capable of capturing two or more bands comprises a parameter input/output and image outputting screen configured to represent each band itself or an image of the band, a band-RGB conversion table configured to use for converting a band number into a color represented in the a parameter input/output and image outputting screen, and wavelength information converting unit configured to calculate the band itself or the color representing the image of the band from the band number by use of the band-RGB conversion table to output the band or the color to the a parameter input/output and image outputting screen.

Abstract: A process is provided for developing and converting a lookup table (hereinafter called a “LUT”) composed of only characteristic points of the characteristic of a color device and having a volume smaller than that of a multidimensional LUT into a multidimensional LUT by a table development process. Image data converting means uses the multidimensional LUT to convert input image data into output image data. Thus, an effect can be obtained in that a color management apparatus can be operated with only the LUT composed of only characteristic points of the characteristic of the device and having a small volume.

Abstract: A conversion table includes a conversion index number corresponding to a logical operation identified in a raster table. The conversion index number provided in the conversion table is mapped from a reference index number provided in the raster table, wherein the reference index number is associated with a raster image operation of one or more RGB operands defined in a first color space. The logical operation may be performed on one or more operands defined in a second color space.

Abstract: A table representing a color gamut for a device for use in a color management system where colors are represented in a color appearance space comprises data representing a collection of hue slices through a boundary surface of the color gamut. The collection of hue slices comprises entries for vertex point hue slices obtained at each vertex point on the boundary surface of the color gamut, and entries obtained for additional hue slices between adjoining vertex point hue slices, where a number of the additional hue slices is determined such that there is no more than a specified angular difference between each hue slice. Each hue slice is represented by a hue value and a collection of hue slice points each containing a lightness value and a chroma value.

Abstract: Displays with embedded color tracking algorithm based on panel optical characteristics are disclosed for color tracking of displays. A display comprising a panel, a switch device, a memory unit and a color tracking unit is provided. The optical characteristics of the panel are obtained by optical measuring equipment, and the optical characteristics are written into an optical look up table stored in the memory unit. Also, according to the optical look up table and a color value, a look up table is generated by the color tracking unit for color correction.

Abstract: An information distribution system configured to deliver various types of content provided by an information distributor to information receivers through a network and transmitting the content to be distributed converted to colors, color values, or color digital values. By converting the content to colors, color values, or color digital values, it is possible to reduce the amount of information transmitted. Due to this, it becomes possible to shorten the time required for distribution of content and to improve practicality. Further, it becomes possible to reduce the distribution costs.

Abstract: A method and apparatus for determining a grid structure for a set of values in a device color space is provided. A multi-step process applies heuristics to a collection of color sample data in order to determine the structure of a look-up table that best fits the samples. A first step is a sorting and counting step, in which the sampling data is sorted for each channel, and the number of steps in each channel is counted. A second step is a check for completeness of the data. A third step is a removal step in which steps are removed if they do not correspond to steps on the axes of the three-dimensional cube. The fourth step is a check for a full Look Up Table (LUT). If a full LUT has been obtained, then the structure of the LUT has been determined and the process ends. On the other hand, if the check for a full LUT is unsuccessful, then a fifth step is performed, in which steps are removed if they are under-correlated with other steps.

Abstract: Aspects of the invention relate to methods and systems for optimizing contrast of digital images and video. Because of the size limitations placed on cameras and sensors that are part of devices, it is common for images to have poor quality. Different images traditionally require different solutions as they exhibit drastically different features. Aspects allow managed control on limiting the stretching strength of a stretching function, thus maintaining the natural appearance of images, tolerable amount of noise enhancement, and contrast reduction on less desirable parts of the image. Further aspects relate to a stretching function presented as one Look Up Table (LUT), thus allowing fast computations on limited computing devices such as consumer electronic devices.

Abstract: A nonlinearly processed (gamma-corrected) video signal is subjected to three-dimensional signal level correction using three-dimensional correction values and corresponding to a position in a horizontal direction and a vertical direction of a pixel on a display screen of an image display unit and the signal level of the pixel data. Thereby, accurate gamma correction is made possible, and horizontal and vertical area information (grid block) can be disposed in an optimum positional relation according to resolution of the screen.

Abstract: A method of restoring RGB gray scale data for maintaining a sharpness of a screen and reducing a size of a memory is disclosed. The RGB gray scale data having M bits are truncated to generate a first RGB gray scale data having N bits, M being a positive integer and N being an integer less than M. RGB gray scale data information is generated based on a bit information of the first RGB gray scale data. A bit value of a MSB of the first RGB gray scale data is compared with a value of a dither table based on the RGB gray scale data information to generate a comparison value, when a bit value of at least one bit of the first RGB gray scale data is different from other bit values of the first RGB gray scale data. The first RGB gray scale data are compensated based on the RGB gray scale data information and the comparison value. Thus, the sharpness of a screen may be maintained and the size of the memory may be reduced.

Abstract: Colors are specified within the individual glyphs of a font by means of an indirect approach which employs multiple tables. The data values for individual pixels of a glyph identify entries in an index table, which pertains to a subset of all available colors. The entries in the index table map to a complete set of colors that are specified in a color table. As a result of this structure, the amount of data that is required to specify the individual pixels of a glyph can be minimized to the number of bits required to distinguish the colors within that glyph. The specification of all available colors within a single table permits that table to be shared among various resources, including bitmap fonts and outline fonts.

Abstract: The invention provides a Gamma conversion system applied on a source of image pixel data. Each image pixel data in the source of image pixel data has an M-bit pixel value with a first Gamma exponent. The Gamma conversion system comprises a storage module, a processing module, and a selecting module. The storage module therein stores I look-up tables. The processing module is respectively coupled to the source of image pixel data and the storage module, and the processing module comprises I converting modules, each of the converting modules corresponds to one look-up table. The selecting module is coupled to the source of image pixel data and the processing module respectively, and generates a selection signal according to the M-bit pixel value. In response to the selection signal, the processing module assigns one of the converting modules to convert the M-bit pixel value into an N-bit pixel value with a second Gamma exponent according to the look-up table corresponding to the assigned converting module.

Abstract: A method and system for transmitting and displaying messages in a mobile terminal using short messaging service (SMS) is disclosed. An SMS message having a primary format information is encoded with a secondary format information, wherein the primary and secondary formats define attributes of the message such as foreground, background, and text color or images.

Abstract: As a method of calibrating colors other than primary colors such as secondary colors, the contents of an ink color-separation table are reconstructed. However, it is difficult to reconstruct the ink color-separation table within the limitation of total ink amount permissible for a print sheet. Accordingly, a color patch corresponding to a signal value of a color to be calibrated is formed in a printer, then the signal value is calibrated based on a measured color value of the formed color patch and a target value corresponding to the signal value of the color to be calibrated, and calibration multidimensional table data is generated based on the measured color value of the formed color patch.

Abstract: A method and system for rendering three-dimensional graphics, including text, provide a compressed texture bitmap. The texture bitmap may represent multiple symbols, each comprised of multiple pixels. Each pixel in the texture bitmap may store information for more than one (e.g., n) compressed values, including pixels corresponding to multiple distinct symbols. For example, the compressed texture bitmap may have n-bit pixels (e.g., 8-bit pixels) that each store m (e.g., eight) 1-bit values. The compressed texture bitmap may be configured for unpacking by a conventional pixel shader, such as a pixel shader that does not typically perform bitwise operations. The unpacking may include matching a fetched pixel to a mapping value in a lookup table, such as a 32-bit value from a 256-color palette. The looked-up value can be separated into separate sub-values to facilitate processing by the pixel shader. For example, the looked-up value can be split into RGBA values conventionally used in processing colored pixels.

Abstract: Methods and apparatuses for the generation of visual effects according to the elapsed time for real time display. One embodiment of the present invention provides an automated mechanism for displaying visual effects (e.g., fade to or from a target color) through adjusting color correction parameters (e.g., the look up table for gamma correction) without disturbing display color calibration settings for the current display device. Time-based adjustments are made in small steps in the beginning and end and large steps in the middle of the transition to provide perceptually smooth transition effect. In one embodiment, a operating system resource is provided to manage, synchronously or asynchronously, the visual effect on behalf of requesting applications, simplifying the coding of the application programs and providing consistency across application programs. In one embodiment, the operating system resource uses a reservation system to prevent conflict and interference between application programs.

Abstract: A method, system, and article of manufacture for reducing aliasing. A method in accordance with one embodiment sampling a pixel of an image at a plurality of pixel sample points to produce a corresponding plurality of pixel sample values, wherein at least one of the plurality of pixel sample points is located at a predetermined displacement from a position along an edge of the pixel. The method further includes combining the plurality of pixel sample values to produce a displayed pixel value. This Abstract is provided to comply with rules requiring an Abstract that allows a searcher or other reader to quickly ascertain subject matter of the technical disclosure. This Abstract is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. 37 CFR 1.72(b).

Abstract: A method of converting image data from L*a*b* color space into CMYK color space by using a three-dimensional direct mapping table employs only data of lattice points existing within the color space. 8-point interpolation is used when all the lattice points constituting a lattice component containing input data are included in the color space, while another interpolation processing (e.g. 4-point interpolation) is employed for a lattice component partially existing outside the color space by using only lattice point data within the color space. Enhancement of precision in color conversion is thus achieved.

Abstract: A method and system are provided for performing gamma correction on display data. Aspects the exemplary embodiment include using at least a portion of the display data to fetch in parallel from a table memory a gamma correction data value stored at an odd address and a gamma correction data value stored at an even address; detecting when the display data comprises a low address; and in response to detecting that the display data comprises a low address, performing a right shift on the gamma correction data values, thereby decreasing the values of the gamma correction data prior to performing interpolation on the gamma compensation data values.

Abstract: A method of image processing using neural networks. Images to be processed and displayed are received. Each image is divided into sections, each comprising pixels represented by color values. A neural network training procedure is executed for the sections to obtain color value tables and mapping tables. Each color value table comprises colors represented by the color values. The mapping tables record the relations between each pixel and the colors in the color value tables. The color value tables and the mapping tables are recorded in an electronic device for image display.

Abstract: A system for reducing crosstalk for a display.

Abstract: An image processing device that performs color conversion processing using a lookup table (LUT) includes an acquiring unit that acquires an emulation LUT for applying emulation of a gamut to a target device from a device in use, the emulation LUT being generated using a device-in-use LUT for performing correction corresponding to input and output characteristics of the device in use and a target device LUT for performing correction corresponding to input and output characteristics of the target device, and a converting unit that performs gamut conversion in performing the emulation using the emulation LUT acquired by the LUT acquiring unit.

Abstract: Methods and apparatus, including computer program products, implement techniques for configuring at least a portion of a document for display in a display environment. The techniques include generating a document color palette for all or a portion of an electronic document, where the colors of the document color palette are selected based on colors of a plurality of color containing objects in the document or portion thereof, and generating a plurality of views of the document, two or more of the views being based on different color palettes. The plurality of views includes a document view including each of the plurality of color containing objects, where each color containing object in the document view is represented using the document color palette.

Abstract: A display apparatus including an offset value setting input part to specify an offset value for a DE signal determining an effective area of a video signal; and a DE signal generator to generate the DE signal depending on the offset value. With this configuration, the present invention provides a display apparatus and a control method thereof, which in advance, offsets a noise section contained in a video signal.

Abstract: An image sensor device formed in an integrated circuit (IC) with one or more shading structures configured to provide a predetermined shading pattern to control the locations at which light impinges on the photodiode areas of the pixels. The predetermined shading patterns preventing color cross-talk and providing the pixels with substantially symmetric angular responses to light to thereby eliminate or reduce the occurrence of artifacts in the output image produced by the image sensor device.

Abstract: A bistable electro-optic display has a plurality of pixels, each of which is capable of displaying at least three gray levels. The display is driven by a method comprising: storing a look-up table containing data representing the impulses necessary to convert an initial gray level to a final gray level; storing data representing at least an initial state of each pixel of the display; receiving an input signal representing a desired final state of at least one pixel of the display; and generating an output signal representing the impulse necessary to convert the initial state of said one pixel to the desired final state thereof, as determined from said look-up table. The invention also provides a method for reducing the remnant voltage of an electro-optic display.

Abstract: When a color reproduction model of a device is generated, colorimetry of a 9×9×9 grid, for example, is performed utilizing equidistant signal values in the color space of the device. Generally, if the number of grid points is increased, the precision with which the color reproduction model is estimated rises but the time needed for measurement is prolonged because the number of colorimetric measurements is also increased. Accordingly, in a printer system comprising a pre-color-processing table for performing color matching and a post-color-processing table for performing color separation, color patches set non-equidistantly in RGB device color space are printed in accordance with changeover of printer CMYKcm signals in the post-color-processing table and the color reproduction model of the printer is generated using data obtained by measuring the colors of the color patches.

Abstract: A gamma correction device and method for a display device are provided, which requires fewer look-up tables and small-size driving voltage generating circuits to generate three sets of driving voltages. A plurality of difference values between three gamma curves R, G, and B and a reference curve is stored in the look-up table. According to the look-up table, a selection signal SEL is obtained based on a gray scale signal. Moreover, a most significant bit (MSB) signal is extracted from the gray scale signal. Then, several analog voltages are generated from a voltage source through voltage division. After that, the selection signal and the MSB signal are decoded so as to select one from the analog voltages and convert to a driving voltage. The driving voltage is used to drive the display device.

Abstract: A method includes obtaining a first value corresponding to a first location in a first color space and obtaining a second value in a second color space using the first value. The method further includes converting the second value to a third value in the first color space corresponding to a second location in the first color space and determining a fourth value related to a distance between the first location and the second location. Additionally, the method includes changing the second value if the fourth value exceeds the predetermined value.

Abstract: The methods and apparatuses detect a color of each of a plurality of pixels within a frame; group a portion of the plurality of pixels having a common color into a block; and generate a color list including the common color based on a threshold value corresponding to the block.

Abstract: A method and apparatus of driving a liquid crystal display device that is adaptive for preventing a deterioration of picture quality. More specifically, a method of driving a liquid crystal display includes dividing input data into most significant bit data and least significant bit data, delaying the most significant bit data for one frame period, and modulating the most significant bit data in accordance with a difference between the delayed most significant bit data and the current most significant bit data, wherein the modulated data have a data width not wider than that of the input data and not narrower than that of the most significant bit data.

Abstract: Differentiating between image and graphic objects contained within a Color Rendering Dictionary improves printing efficiency. The differentiation between image and graphic objects is accomplished by monitoring the sequence in which Color Rendering Dictionary procedures are executed. Based on the monitored sequence, an image or graphic object is determined to be used for rendering.

Abstract: A color correction method, a color correction device, and a color correction program that can achieve color correction processing with a color table with a fine spacing, while preventing the increase in memory capacity. A signal (YCC signal) of a luminance—color difference system is subjected to matrix conversion with a matrix conversion unit 10 and converted into a signal (RGB signal) of a display signal system. The adjustment amount relating to the signal of the display signal system is stored in a RGB color adjustment LUT 20. An interpolation processing unit 20 conducts interpolation processing by referring to the RGB color adjustment LUT 20 and outputs the color-corrected RGB signal after correction.

Abstract: Color conversion apparatus and methods are provided for converting a first color value, such as an RGB, L*a*b* or XYZ color value, to a second color value, such as an RGB, CMY, CMKY, L*a*b*, L, C1C2, or XYZ color value, without saturation error.

Abstract: Methods and apparatuses for the application of image intensity and luminance adjustment and gamma adjustment for the purpose of compensating perceived image brightness, and thus enhancing the range of display backlight brightness adjustment that may be applied to conserve power, while minimizing impact to image color shade, hue or saturation characteristics.

Abstract: It comprises a main CPU, a main memory for storing the programs, display data and other data, a data processing circuit for performing a processing to convert the display data in the main memory to the data format for the display, a display memory section for storing the converted display data, an output processing circuit for performing a processing to output the display data on the screen, a DMA for performing a data access to the main memory, a program memory, a data memory, a display processor for interpreting the commands/data described in the program memory and the data memory and transferring the display data according thereto, and a sync signal generating circuit.

Abstract: Contents of a text processing job is not pre-traced, and at a stage of processing a drawing object, a CLUT combination relating thereto is determined to be ON/OFF. A plurality of drawing objects are associated with a set of CLUT combination, and a CLUT combination which has been once ON is maintained as is ON.