Gamut Clipping Or Adjustment Patents (Class 345/590)
  • Patent number: 10339849
    Abstract: A method for regulating brightness and chromaticity of a display panel includes: obtaining original gray-scale data; regulating gray-scales of green, so that brightness values of pixels match a standard gamma curve; matching color coordinates of red and blue using the gray-scales of green; determining a weight coefficient according to a gradation of the gray-scales of green; and calculating and recording color coordinates of target gray-scales of red and blue using the determined weight coefficient.
    Type: Grant
    Filed: December 27, 2016
    Date of Patent: July 2, 2019
    Assignee: Wuhan China Star Optoelectronics Technology Co., Ltd
    Inventor: Yufeng Jin
  • Patent number: 10332437
    Abstract: Provided is a color adjustment method for a display apparatus. The color adjustment method includes: measuring first luminance coordinate data indicating a luminance and color coordinates of a color displayed on a display device when image data corresponding to a white point is supplied to a drive circuitry; measuring second luminance coordinate data indicating luminances and color coordinates of colors displayed on the display device when image data corresponding to the white color of intermediate grayscale values are supplied to the drive circuitry; measuring third luminance coordinate data indicating a luminance and color coordinates of a color displayed on the display device for each of R, G and B elementary color points when image data corresponding to each of the R, G and B elementary color points is supplied to the drive circuitry; and calculating correction parameters based on the first to third luminance coordinate data.
    Type: Grant
    Filed: May 11, 2017
    Date of Patent: June 25, 2019
    Assignee: Synaptics Japan GK
    Inventors: Masao Orio, Hirobumi Furihata, Susumu Saito, Takashi Nose, Akio Sugiyama
  • Patent number: 10264259
    Abstract: Techniques are provided to encode and decode image data comprising a tone mapped (TM) image with HDR reconstruction data in the form of luminance ratios and color residual values. In an example embodiment, luminance ratio values and residual values in color channels of a color space are generated on an individual pixel basis based on a high dynamic range (HDR) image and a derivative tone-mapped (TM) image that comprises one or more color alterations that would not be recoverable from the TM image with a luminance ratio image. The TM image with HDR reconstruction data derived from the luminance ratio values and the color-channel residual values may be outputted in an image file to a downstream device, for example, for decoding, rendering, and/or storing. The image file may be decoded to generate a restored HDR image free of the color alterations.
    Type: Grant
    Filed: June 18, 2018
    Date of Patent: April 16, 2019
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Wenhui Jia, Ajit Ninan, Arkady Ten, Gregory John Ward
  • Patent number: 10242461
    Abstract: The present disclosure relates a method to improve overlay mapping of out-of-gamut. The method includes: step 10, converting a RGB digital value to a L*a*b* value of a Lab color space; step 20, determining a hue plane where the color point P located, and further determining values of a hue angle H, a color saturation C, and a brightness L; step 30, determining a reference color point Pi by combing intersections color point PC and color point PS with the color point Lm and a parameter ?; step 40, determining whether the color point P inside or outside a line |LmPi|; and step 50, converting a L*a*b* value into a RGB value in the target gamut. The method to improve the overlay mapping of out-of-gamut according to the present disclosure causes multiple colors to no longer be mapped to the same color point.
    Type: Grant
    Filed: November 25, 2017
    Date of Patent: March 26, 2019
    Assignee: SHENZHEN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO., LTD.
    Inventor: Yang Rao
  • Patent number: 10237487
    Abstract: The electronic camera has an imaging device that images a subject with subject reflectance R (%) with a dynamic range wider than that at displaying or printing to acquire image data and a recording device that converts the image data acquired by the imaging device with a predetermined function and records the converted image data and the information on the function as digital values (digit). Therefore, a printed image with an automatically or manually corrected density can be obtained at the displaying or the printing.
    Type: Grant
    Filed: November 27, 2017
    Date of Patent: March 19, 2019
    Assignee: FUJIFILM Corporation
    Inventors: Manabu Hyodo, Yoshiya Ohara
  • Patent number: 10223774
    Abstract: A processor for approximating a reshaping function using a multi-segment polynomial receives an input reshaping function. Given a number of target segments (N) and an initial maximum fitting error, in a first pass, it applies a first smoothing filter to the input reshaping function to generate a first smoothed reshaping function. Next, it generates a first multi-segment polynomial approximation of the input reshaping function based on one or more multi-segment polynomial approximation algorithms, the smoothed reshaping function, the number of target segments, and the initial maximum fitting error. The same process may be repeated in two or more similar passes that may include in each pass: reconstructing the reshaping function from the polynomial approximation of the previous pass, smoothing and segmenting the reconstructed reshaping function, and generating an updated multi-segment polynomial approximation according to an updated maximum fitting error.
    Type: Grant
    Filed: July 12, 2017
    Date of Patent: March 5, 2019
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Harshad Kadu, Subhayan Mukherjee, Guan-Ming Su
  • Patent number: 10217439
    Abstract: An electronic device may be provided with a display mounted in a housing. Color ambient light sensors may make measurements of ambient light intensity and color through windows in an inactive border region of the display or other portions of the device. The electronic device may process the ambient light measurements based on ambient light information from the ambient light sensors and based on information from additional sensors such as an image sensor, a force sensor, a capacitive touch sensor, a proximity sensor, an orientation sensor, and other devices. Control circuitry in the electronic device may produce reliable ambient light measurements by combining readings from multiple reliable sources and by discarding readings from ambient light sensors that are blocked by a user's fingers or other external objects. Display color cast and intensity may be adjusted based on ambient light information.
    Type: Grant
    Filed: August 16, 2016
    Date of Patent: February 26, 2019
    Assignee: Apple Inc.
    Inventors: Nicolas P. Bonnier, Cheng Chen, Jiaying Wu, Wei Chen, Paul V. Johnson, John Z. Zhong
  • Patent number: 10199011
    Abstract: Systems, methods, and devices are provided for generating a tone mapping function used in adjusting the power consumed by a backlight of an electronic display. One such method includes sampling an image frame in framebuffer space and generating a tone mapping function in linear space. The tone mapping function may have at least two portions: a nondistorting portion that does not to distort pixels to which it applies when an intensity of a backlight of the electronic display is modified and a distorting portion that does distort pixels to which it applies when the intensity of the backlight is modified. Thereafter, the intensity of the backlight may be modified based at least in part on the nondistorting portion of the tone mapping function, the tone mapping function converted to framebuffer space, and the tone mapping function applied to the image frame or a subsequent image frame.
    Type: Grant
    Filed: September 10, 2013
    Date of Patent: February 5, 2019
    Assignee: APPLE INC
    Inventors: Ulrich T. Barnhoefer, Robert E. Jeter
  • Patent number: 10186226
    Abstract: A transparent display device includes a transparent display panel which displays an image, a scan driver which provides a scan signal to the transparent display panel, a data driver which driver converts image data into a data signal based on an applied gamma curve and provides the data signal to the transparent display panel, a timing controller which controls the scan driver and the data driver, and a gamma curve adjuster which adjusts the applied gamma curve based on a reference gamma value of a reference gamma curve, luminance of incident light that enters the transparent display panel, light transmittance of the transparent display panel, and panel-luminance of the transparent display panel.
    Type: Grant
    Filed: May 5, 2016
    Date of Patent: January 22, 2019
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Young-Jun Seo, Hyo-Sun Kim, Byung-Choon Yang
  • Patent number: 10134360
    Abstract: By converting a first color space to a second color space, using a two-dimensional lookup table in said second color space, and converting from said second color space to said first color space, it may be possible to use one or more two-dimensional lookup tables (LUTs) to do a task conventionally handled by three-dimensional lookup tables. This may reduce storage requirements and memory bandwidth requirements in some embodiments. In general a color pixel with N color components can be processed with n number of M dimensional LUT where M<N and n is some chosen positive integer number.
    Type: Grant
    Filed: November 25, 2014
    Date of Patent: November 20, 2018
    Assignee: Intel Corporation
    Inventors: Susanta Bhattacharjee, Sameer Kp
  • Patent number: 10129513
    Abstract: The present invention provides a method and system for determining and providing color metadata for a downlink data channel. In accordance with the present invention color metadata is determined such that gamut mapping is defined by a transmitted source gamut which enables adapted mapping that preserves saturation and contrast levels of the source for a downlink data channel. The metadata is then provided to a downlink data channel for color management.
    Type: Grant
    Filed: June 11, 2015
    Date of Patent: November 13, 2018
    Inventors: Ingo Tobias Doser, Jurgen Stauder, Laurent Blonde, Julien Thollot, David J Bancroft, Wolfgang Endress
  • Patent number: 10027961
    Abstract: Techniques are provided to encode and decode image data comprising a tone mapped (TM) image with HDR reconstruction data in the form of luminance ratios and color residual values. In an example embodiment, luminance ratio values and residual values in color channels of a color space are generated on an individual pixel basis based on a high dynamic range (HDR) image and a derivative tone-mapped (TM) image that comprises one or more color alterations that would not be recoverable from the TM image with a luminance ratio image. The TM image with HDR reconstruction data derived from the luminance ratio values and the color-channel residual values may be outputted in an image file to a downstream device, for example, for decoding, rendering, and/or storing. The image file may be decoded to generate a restored HDR image free of the color alterations.
    Type: Grant
    Filed: September 25, 2017
    Date of Patent: July 17, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Wenhui Jia, Ajit Ninan, Arkady Ten, Gregory John Ward
  • Patent number: 10019780
    Abstract: The present disclosure provides a method for transferring data for displaying images at a first resolution to a display panel of a second resolution, the first resolution being higher than the second resolution. The method includes steps of sequentially collecting and storing pixel data into primary caches; sequentially transferring the pixel data stored in the primary caches to a data processing unit; and applying a color mixing process to received pixel data according to a time-sharing operation to generate display data. The method also includes sequentially transferring the display data to secondary caches and repeating the steps until pixel data for a row of pixel structures corresponding to the first resolution are processed and stored in the secondary caches as display data, and transferring the display data to a row of pixel structures corresponding to the second resolution.
    Type: Grant
    Filed: December 10, 2015
    Date of Patent: July 10, 2018
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventor: Hui Zhao
  • Patent number: 9955174
    Abstract: Systems and methods for improving efficiency in three-dimensional (3D) look-up table (LUT) coding and/or reducing table size of a 3D LUT may be provided. For example, octants associated with the 3D LUT may be provided for color space segmentation and coding may be performed on an octree associated with the octants where coding may include encoding nodes of the octree associated with the octants and corresponding vertices of the 3D LUT belonging to the nodes. Conversion parameters represented by the nodes are lossy coded with reduced precision. The 3D LUT may also be signaled (e.g., based on a sequence and/or picture level).
    Type: Grant
    Filed: September 19, 2014
    Date of Patent: April 24, 2018
    Assignee: VID SCALE, Inc.
    Inventors: Yan Ye, Jie Dong, Yuwen He
  • Patent number: 9940690
    Abstract: A terminal apparatus includes: a buffer memory that stores rendering data displayed on a display device; and a processor that acquires, according to scroll operation of the display device, rendering data including a connection portion, which is connected to a residual portion displayed in a moving destination region on a screen after the scroll operation from a screen before the scroll operation and is displayed, stores, in the buffer memory for storing the rendering data including the moving destination region and the connection portion, the rendering data of the residual portion and the rendering data including the connection portion, and outputs, in response to update of a display position of the rendering data stored in the buffer memory, the rendering data, the display position of which is updated, to the display device after the scroll operation.
    Type: Grant
    Filed: February 1, 2016
    Date of Patent: April 10, 2018
    Assignee: FUJITSU LIMITED
    Inventors: Tomoharu Imai, Kazuki Matsui
  • Patent number: 9911371
    Abstract: A display panel driver includes an image data generator, a brightness correction circuit performing a correction calculation on image data, a drive section driving the display panel in response to corrected image data; and a display timing generator outputting a timing control signal. The correction calculation by the brightness correction circuit is adjustable. When the display panel driver is placed into a test mode, the display timing generator is configured to output an internally-generated timing control signal and the image data generator outputs internally-generated evaluation image data. The evaluation image data are generated so that the evaluation images are switched from one to another in response to the internally-generated timing control signal.
    Type: Grant
    Filed: January 16, 2014
    Date of Patent: March 6, 2018
    Assignee: Synaptics Japan GK
    Inventors: Akio Sugiyama, Takashi Nose, Hirobumi Furihata
  • Patent number: 9858846
    Abstract: The present invention discloses a method of RGBW compensation based on color aberrations of white subpixel and an apparatus thereof: when aberrations exist between a color coordinate point Ws of white subpixel and a standard white color coordinate point Wd under sRGB, analyzing color coordinates of every subpixel on the RGBW panel, and then dividing a triangle with vertices points Rs, Gs and Bs into three triangle regions based on Ws as the center point; based on ranges of the three triangle regions, a triangle region where Wd is located is confirmed; a first data is calibrated by performing compensating the white subpixel corresponding by the center point Ws via a predetermined normalized proportion through two subpixels corresponding to the other two points within the triangle region surrounding and locating Wd. Through the aforementioned manner, the present invention is capable of calibrating aberrations of white subpixels in order to normalize images of RGBW panels.
    Type: Grant
    Filed: September 21, 2015
    Date of Patent: January 2, 2018
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd
    Inventor: Yufeng Jin
  • Patent number: 9837045
    Abstract: A display device includes a display panel; and a display panel driver driving the display panel. The display panel driver includes: a processing circuit configured to perform digital arithmetic processing on R, G and B grayscale values of input image data to calculate R, G and B grayscale values of output image data, respectively, and a control point data generation circuit configured to: generate first control point data indicating the shape of a desired gamma curve; calculate Re, G and B control point data indicating input-output curves of digital arithmetic processing performed on the R, G and B grayscale values of the input image data by correcting the first control point data in response to the input image data. The processing circuit is configured to calculate the R, G and B grayscale values of the output image data in response to the R, G and B control point data.
    Type: Grant
    Filed: July 27, 2015
    Date of Patent: December 5, 2017
    Assignee: Synaptics Japan GK
    Inventors: Hirobumi Furihata, Takashi Nose, Masao Orio, Akio Sugiyama
  • Patent number: 9734440
    Abstract: System and method of calibration, screening, and compensation for multiple gray-level digital presses. Unequal quantization of the input range is employed with compensated overlapping of sub-ranges. Multiple instances of bi-level screening algorithms, tone modification functions, and a recombination algorithm are employed to produce calibrated screening on individual tone ranges. The method works with any bi-level screening algorithm and devices with any number of gray-levels. Quality imaging results from high detail, high tonal accuracy, low screening noise, and lack of printed artifacts. Dynamic re-calibration is facilitated. The elimination of the constraint of evenly spaced gray-levels has advantages of cost and yield for print head fabricators and digital press manufacturers. Multiple implementations are given for hardware and software embodiments.
    Type: Grant
    Filed: April 30, 2015
    Date of Patent: August 15, 2017
    Assignee: Rampage LLC
    Inventor: Mitchell J. Bogart
  • Patent number: 9716887
    Abstract: Methods to reduce chroma-related artifacts during video coding of high dynamic range images are presented. Given an input signal in a color space comprising a luma component and two chromaticity components, a processor determines the original white point chromaticity coordinates (Du, Dv) of a white point in the color space of the input signal. The input signal is translated using a chromaticity translation function to a second signal in a translated color space comprising two translated chromaticity components, wherein the chromaticity translation function shifts the original white point chromaticity coordinates to a predetermined second set of coordinates in the translated chromaticity color space. The second signal is encoded to generate a coded bit stream.
    Type: Grant
    Filed: December 6, 2016
    Date of Patent: July 25, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Robin Atkins, Jon Scott Miller
  • Patent number: 9552793
    Abstract: A data processing device includes a first reference value generator which generates a first reference value corresponding to a ratio of a chromatic color using image signals or first image signals obtained by gamma-compensating the image signals, a white generator which generates a white image signal and second image signals using the first image signals and a second reference value corresponding to an amount of a white data in use, a third reference value generator which generates a third reference value using a first color coordinate corresponding to a color coordinate of the second image signals, a second color coordinate corresponding to a color coordinate of the white image signal, the first reference value, and the second reference value, and a gamut mapper which maps the second image signals to a color coordinate corresponding to the third reference value to generate third image signals.
    Type: Grant
    Filed: January 29, 2014
    Date of Patent: January 24, 2017
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Byung Ki Chun, Dongwook Yang, Yongseok Choi
  • Patent number: 9554020
    Abstract: Video data with enhanced dynamic range (EDR) are color graded for a first and a second reference display with different dynamic range characteristics to generate a first color-graded output, a second color graded output, and associated first and second sets of metadata. The first color-graded output and the two sets of metadata are transmitted from an encoder to a decoder to be displayed on a target display which may be different than the second reference display. At the receiver, a decoder interpolates between the first and second set of metadata to generate a third set of metadata which drives the display management process for displaying the received video data onto the target display. The second set of metadata of metadata may be represented as delta metadata values from the first set of metadata values.
    Type: Grant
    Filed: November 10, 2014
    Date of Patent: January 24, 2017
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Kimball D. Thurston, III, James E. Crenshaw, Robin Atkins, Tao Chen, Timo Kunkel
  • Patent number: 9478006
    Abstract: Content aware cropping techniques are described in which a combined crop and fill operation may be performed in one-step using an automated workflow. In one or more implementations, an image is exposed for editing in a user interface and input is obtained that indicates a position for a crop frame to select a portion of the image. The crop frame may be employed as a basis for a combined crop and fill operation that is initiated by a single input or trigger that causes a sequence of actions to automatically crop the image, recognize portions of empty pixels to fill, apply a content aware fill algorithm, and produce a resulting output image. In one or more implementations, a size of the crop frame may be controlled to maintain at least one of image size, aspect ratio, or pixel resolution.
    Type: Grant
    Filed: March 28, 2014
    Date of Patent: October 25, 2016
    Assignee: Adobe Systems Incorporated
    Inventors: Anand Samuel Edwin, Komal Kumar Desai, Charan Raj
  • Patent number: 9479680
    Abstract: In a digital camera system, traditional input color transformations of raw data using a 3×3 matrix are replaced by two-dimensional lookup (2-D LUTs) tables that better approximate spectral reflectance characteristics. Chromaticity-like signals and an input scale factor are generated in response to raw sensor output values. The chromaticity signals and the input scale factor are mapped via 2-D LUTs into preliminary output signals and an output scaling factor. A final set of output color signals is generated in response to the preliminary output signals and the output scale factor. The 2-D LUTs are designed in response to spectral response curves generated on both the input and output side of the color transformation.
    Type: Grant
    Filed: October 27, 2014
    Date of Patent: October 25, 2016
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Jon S. McElvain
  • Patent number: 9478192
    Abstract: The present invention discloses an image processing method includes steps of measuring stimulus value matrixes of trichromatic grays of a displaying image; calculating a stimulus value matrix of each pixel gray of the displaying image from the measured stimulus value matrixes; transforming the stimulus value matrixes of each pixel gray to coordinate values of each pixel in a color space; calculating a chromatic aberration between two adjacent pixels of each row and each column in the color space; selecting a pixel area and calculating a chromatic aberration value of the pixels in the selected pixel area and a chromatic aberration value between pixels of a periphery of the selected pixel area and the adjacent pixels out of the selected pixel area; executing an image process to the selected pixel area if a difference between these two chromatic aberration values and a preset chromatic aberration threshold value meets a predetermined rule.
    Type: Grant
    Filed: January 17, 2014
    Date of Patent: October 25, 2016
    Inventors: Lixuan Chen, Chih-tsung Kang
  • Patent number: 9424370
    Abstract: A method and related CAD system and computer readable medium. A method includes loading an object model in a CAD system, the object model including a plurality of parts each of which may contain one or more shapes which in turn are composed of multiple polygons. The method includes adding the shapes to a spatial tree, the shapes each corresponding to at least one cell, each cell corresponding to a spatial region of the object model. The method also includes, for each cell that is too complex to process within a memory space of the CAD system, subdividing the cell into a plurality of subcells using a first subdivision process. The method also includes subdividing each cell into a plurality of subcells using a multi-threaded subdivision process, and combining the subcells into the spatial tree.
    Type: Grant
    Filed: December 3, 2009
    Date of Patent: August 23, 2016
    Assignee: Siemens Product Lifecycle Management Software Inc.
    Inventors: Jeremy Bennett, Michael B. Carter
  • Patent number: 9396695
    Abstract: A source driver includes a first drive channel circuit, a voltage controller and a first programmable voltage buffer unit. The first drive channel circuit receives a first pixel data and a first reference voltage group, for driving the display device. The voltage controller receives a voltage command during a line data transmitting period, a horizontal blanking period or a vertical blanking period for generating a first reference voltage configuration data. The first programmable voltage buffer unit is coupled to the voltage controller and the first drive channel circuit, and receives the first reference voltage configuration data for applying the first reference voltage group to the first drive channel circuit. Furthermore, a method for driving a display device is also provided.
    Type: Grant
    Filed: December 4, 2014
    Date of Patent: July 19, 2016
    Assignee: Novatek Microelectronics Corp.
    Inventors: Jr-Ching Lin, Hsin-Hung Lee, Chia-Wei Su, Po-Yu Tseng, Shun-Hsun Yang, Po-Hsiang Fang
  • Patent number: 9367934
    Abstract: In the image processing apparatus, Input transform into an input color space is performed on input image data; After the input transform, transform processing of transforming chroma or chromaticity of the input image data or chroma or chromaticity in the input color space is performed so as to reduce a difference between a space of chroma or chromaticity of the input image data and a space of chroma or chromaticity in the input color space to acquire transformed image data; and Output transform into an output color space is performed on the transformed image data using a three-dimensional lookup table including inverse transform processing of returning the chroma or chromaticity of the transformed image data to the chroma or chromaticity of the input image data to acquire output image data.
    Type: Grant
    Filed: December 1, 2014
    Date of Patent: June 14, 2016
    Assignee: FUJIFILM Corporation
    Inventors: Yasuharu Iwaki, Mitsuhiro Uchida
  • Patent number: 9349774
    Abstract: An organic light emitting diode display device includes a substrate including a display and non-display regions at a periphery of the display region with red, green, blue and white pixel regions as one pixel group formed in the display region, and the display region divided into a first region and a second region; an organic emitting diode in each of the red, green, blue and white pixel regions; first to third power lines respectively disposed at an end of the first region, at an opposite end of the second region and a boundary of the first and second regions and connected to the organic emitting diode; a first drive integrated circuit connected to the first and third power lines; and a second drive integrated circuit connected to the second and third power lines, wherein the first and second regions are symmetric with respect to the third power line.
    Type: Grant
    Filed: October 28, 2014
    Date of Patent: May 24, 2016
    Assignee: LG Display Co., Ltd.
    Inventors: Min-Jae Shin, Jae-Wook Kwon
  • Patent number: 9342872
    Abstract: A color correction parameter computation method includes: obtaining first color-signal values respectively corresponding to colors of color patches and obtained by photographing a color chart having the patches thereon, and reference color-signal values respectively defining the colors of the patches; computing, for each color of the patches, a color difference component between the first and the reference color-signal values; selecting at least one color of the patches by comparing the magnitude of the difference components; computing a color correction parameter using the first and the reference color-signal values corresponding to the selected color; computing an accuracy measure using the difference component between a second corrected color-signal value obtained by correcting a first color-signal value corresponding to a color other than the selected color and the reference color-signal value defining the color other than the selected color; and determining correction accuracy by comparing the accuracy m
    Type: Grant
    Filed: May 19, 2015
    Date of Patent: May 17, 2016
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Koji Horiuchi, Tadanori Tezuka, Hiroto Tomita
  • Patent number: 9223771
    Abstract: In some embodiments, an option to lock one or more associated cells is provided with respect to each different group of cells in a single sheet of a spreadsheet application. One or more locked cells of a group of cells do not scroll out of view at least while a portion of the group of cells is viewable in a given display view.
    Type: Grant
    Filed: September 30, 2008
    Date of Patent: December 29, 2015
    Assignee: APPLE INC.
    Inventors: Matthew Ross Lehrian, Christopher Douglas Weeldreyer, Tsurishaddai Williamson
  • Patent number: 9219898
    Abstract: A technique for enabling display of a source color space on a display color space commences by first receiving source color space information. The source color space information undergoes a conversion into a device independent color space. Once converted into the device independent color space, a LUT or other matrix assigns output colors for the input colors corresponding to the specific display device color space. The LUT or other matrix can be generated with the source material and transmitted to the source display device.
    Type: Grant
    Filed: December 7, 2006
    Date of Patent: December 22, 2015
    Assignee: Thomson Licensing
    Inventor: Ingo Tobias Doser
  • Patent number: 9214010
    Abstract: A transformation rule of color transformation in an appropriate color space is set even without advanced knowledge and know-how. A three-dimensional lookup table unit transforms color information on an input image signal on the basis of a transformation rule. A correction range calculation unit calculates a correction range in a predetermined color space on the basis of a positional relationship between source coordinates and destination coordinates in the color space. A lattice point transfer distance calculation unit calculates the transformation destination coordinates at respective points on the basis of the positional relationship between the source coordinates and the destination coordinates, and a positional relationship between coordinates at the respective points within the correction range and the source coordinates to reflect the calculated transformation destination coordinates on the transformation rule.
    Type: Grant
    Filed: October 31, 2012
    Date of Patent: December 15, 2015
    Assignee: Renesas Electronics Corporation
    Inventor: Hirofumi Kawaguchi
  • Patent number: 9153044
    Abstract: A liquid crystal display device 10 according to the present invention includes a processing device 12 configured to process an image signal D to be input into a pixel P of a liquid crystal panel 40 configured to provide a display based on light applied from LEDs 54 arranged in a peripheral area R2. The process device 12 includes a receiving section 22, a correction section 24, and a calculation section 28, for example. The calculation section is configured to calculate luminance components to be provided by the respective LEDs 54 to the pixel P based on a distance between each LED 54 and the pixel P, add a total luminance that is a sum of the luminance components to be provided by the LEDs 54 to a predetermined expected luminance to calculate an added luminance, and calculate a correction coefficient HP with respect to the pixel P based on a luminance ratio between the added luminance and the reference luminance.
    Type: Grant
    Filed: March 14, 2012
    Date of Patent: October 6, 2015
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Tatsuhiko Suyama, Kouji Kumada, Noriyuki Tanaka
  • Patent number: 9147378
    Abstract: Techniques are disclosed for facilitating the selection of a color using a computer-based user interface. In one embodiment, the user interface includes a hue-saturation-brightness (HSB) color field and a luminosity slider. The HSB color field can be a two-dimensional field of a selected hue, with varying degrees of saturation displayed in one dimension, and varying degrees of brightness displayed in the other dimension. The luminosity slider can be a control element that adjusts the luminosity of a color having a selected hue and saturation. In such an embodiment, the HSB color field and the luminosity slider can be operatively coupled, such that modifying the luminosity of a selected color using the luminosity slider causes the resulting modified color to be indicated in the HSB color field. This provides the user with a better sense of how a selected color relates to other similar colors, thereby facilitating color selection.
    Type: Grant
    Filed: April 1, 2013
    Date of Patent: September 29, 2015
    Assignee: Adobe Systems Incorporated
    Inventor: Aaron Shekey
  • Patent number: 9135865
    Abstract: An image display apparatus and an image optimization method are provided. The image display apparatus includes an image content analyzer, a luminance compensator, and an image optimization processor The image content analyzer receives image data and ambient luminance and generates a backlight luminance adjustment value according to the image data and the ambient luminance. The luminance compensator generates an image data luminance adjustment value according to the backlight luminance adjustment value and generates first image data by adjusting the luminance of the image data according to the image data luminance adjustment value. The image optimization processor generates a saturation adjustment weight according to the image data luminance adjustment value. According to the saturation adjustment weight, the image optimization processor generates output image data by adjusting the luminance of the first image data.
    Type: Grant
    Filed: November 11, 2013
    Date of Patent: September 15, 2015
    Assignee: Novatek Microelectronics Corp.
    Inventors: Chih-Yuan Yang, Yu-Hsing Chuang, Feng-Ting Pai
  • Patent number: 9129547
    Abstract: A method for color reproduction in a display device includes receiving spectral color input to be displayed on the display device. The method additionally includes selecting a primary from a plurality of available primaries that is a closest match of a spectral reflectance of the spectral color input, wherein each of the plurality of available primaries is assigned an association with an associated spectral reflectance. The method also includes displaying the selected primary in a temporal frame of a set of temporal frames for a pixel and passing remaining spectral errors to a next temporal frame of the set of temporal frames. The method further includes passing remaining spectral errors to neighbor pixels for spatial error diffusion at each spectral band after all temporal frames of the set of temporal frames are used.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: September 8, 2015
    Assignee: QUALCOMM Incorporated
    Inventor: Huanzhao Zeng
  • Patent number: 9111480
    Abstract: A liquid crystal display that includes a plurality of pixels configured to display four colors, and a color gamut mapping unit configured to convert three color input image signals into four color image signals, wherein when the three color input image signals include yellow, the color gamut mapping unit converts the three color input image signals based on a hue shift of the yellow.
    Type: Grant
    Filed: July 6, 2012
    Date of Patent: August 18, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Gi Chang Park, Sang Hyun Lee, Do Hyoung Kwon, Yung Kyung Park, Jong Seo Lee
  • Patent number: 9076369
    Abstract: An image modulation apparatus includes a device information obtaining unit to obtain device property information of a plurality of display devices respectively disposed at a plurality of image distribution destination apparatuses; a simulated image generator to generate a simulated image to be displayed on each of the display devices disposed at each of the image distribution destination apparatuses based on a distribution target image, to be transmitted to each of the image distribution destination apparatuses, and the device property information of each of the display devices obtained by the device information obtaining unit; and an image modulation unit to modulate the distribution target image based on a modulation instruction prepared for the plurality of the simulated images simulated by the simulated image generator.
    Type: Grant
    Filed: January 31, 2013
    Date of Patent: July 7, 2015
    Assignee: RICOH COMPANY, LTD.
    Inventor: Atsushi Yoshida
  • Patent number: 9036228
    Abstract: An image processing device comprises: a first output device having a first color gamut and outputting an image based on a given first color reproduction target value; a second output device having a second color gamut and outputting an image based on a second color reproduction target value; a color gamut information acquirer for acquiring a first color gamut information relating to the first color gamut of the first output device and a second color gamut information relating to the second color gamut of the second output device; and a target value generator for producing a second color reproduction target value for the second output device by correcting the given color reproduction target value for the first output device based on acquired first and second color gamut information by the color gamut information acquirer.
    Type: Grant
    Filed: February 8, 2011
    Date of Patent: May 19, 2015
    Assignee: FUJIFILM Corporation
    Inventor: Hideki Yamagishi
  • Patent number: 9030485
    Abstract: An apparatus and a method for correcting colors of an image projection device are provided. The method includes: acquiring a photographed image by photographing a sample image projected on projection surface; generating input-output color information for n regions, based on color values of a block in the sample image and corresponding color values of the block in the photographed image; selecting one of the n regions of photographed images as a reference region; generating look-up tables (LUTs) for non-reference regions, based on the reference region and the input and output color information; and correcting colors of input images to be projected by the image projection device using the look-up tables, thereby minimizing color difference of the input images on the projection surface for both intra and inter projection device color correction while simplifying the correction procedure.
    Type: Grant
    Filed: October 23, 2012
    Date of Patent: May 12, 2015
    Assignees: Electronics and Telecommunications Research Institute, National University of Sciences & Technology
    Inventors: Yong Ju Cho, Yong Ju Lee, Seung Kwon Beack, Ji Hun Cha, Seong Yong Lim, Myung Seok Ki, Joo Myoung Seok, Jin Woong Kim, Muhammad Murtaza Khan, Rehan Hafiz, Haris Anis, Mutahir Latif, Ashar Rasul, Arshad Ali
  • Publication number: 20150123985
    Abstract: Improving the visibility of the dark portion and to prevent the degradation of image quality caused by excessive correction. A reflectance calculation unit is storing a parameter RGain for adjusting the amplitude of a reflectance component R. An illumination light correction unit generates a corrected illumination light component L1 from an illumination light component L and a formula L1=(log(LAmp*L+1))/(log(LAmp+1)). An image resynthesis unit obtains a corrected illumination light component L? from L?=LGain*L1 +(1?LGain)*L. The image resynthesis unit also calculates a corrected image Tout from the corrected illumination light component L? and the corrected reflectance R?, as well as from a formula Iout=exp(log L?+RGain(log I?log L)). The value of the corrected illumination light component (L?) is determined based on the ratio (LGain) at which the output value of the correction function (L1) and the original illumination light component (L) are combined.
    Type: Application
    Filed: August 29, 2012
    Publication date: May 7, 2015
    Applicant: EIZO Corporation
    Inventors: Reo Abe, Masashi Nakao, Masafumi Higashi
  • Publication number: 20150123986
    Abstract: A color gamut controlling device and a display device including the color gamut controlling device. The color gamut controlling device includes a light sensing unit, a first calculation unit, a second calculation unit, and a color gamut calculation unit. The light sensing unit measures a luminance of external light. The first calculation unit calculates adjusted tristimulus values for each of three primary colors based on the measured luminance. The second calculation unit calculates final tristimulus values for each of the three primary colors using the adjusted tristimulus values and target tristimulus values for each of the three primary colors. The color gamut calculation unit calculates a corrected color gamut from the final tristimulus values. The light sensing unit may further measure tristimulus values of the external light for each of the three primary colors.
    Type: Application
    Filed: November 3, 2014
    Publication date: May 7, 2015
    Inventors: Min-Tak Lee, Kyu-Seok Kim, Young-Nam Yun
  • Patent number: 9019294
    Abstract: A first table, which expresses a color reproducible characteristic of a first output device, is generated, and a second table, which expresses a color reproducible characteristic of a second output device, is generated. Color values of grid points of the first table are mapped to a color gamut of the second output device expressed by the second table. A third table, which expresses a relationship between color values of the first table after mapping processing and device values required to reproduce colors of the color values by the second output device, is generated. With reference to the third table, a profile, which expresses a relationship between color values of grid points arranged on a uniform color space, and device values required to reproduce colors of the color values by the second output device, is generated.
    Type: Grant
    Filed: April 4, 2013
    Date of Patent: April 28, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takahiro Matsuura
  • Publication number: 20150109320
    Abstract: A display device includes an image display unit and a conversion processing unit that receives a first input signal including first color information which is obtained based on an input video signal and which is for displaying at a predetermined pixel, and outputs a second input signal including second color information in which a hue of the first color information is varied by an amount of hue variation within a range defined such that hue variation falls within a predetermined range.
    Type: Application
    Filed: October 21, 2014
    Publication date: April 23, 2015
    Inventors: Tatsuya Yata, Takayuki Nakanishi
  • Publication number: 20150109319
    Abstract: The display device includes an image display unit including pixels each including first to third sub-pixels and a fourth sub-pixel for displaying an additional color component according to an amount of lighting of a self-emitting element; a conversion processing unit that performs, for all of pixels, an image analysis on first color information for display at a predetermined pixel, and if a predicted value of power consumption as a total amount of lighting of self-emitting elements is above a limit, outputs a second input signal through a color conversion process on a first input signal including the first color information at a color conversion rate associated with the predicted value; and a fourth sub-pixel signal processing unit that outputs, to the image display unit, a third input signal including third color information with converted red, green, blue, and additional color components.
    Type: Application
    Filed: October 21, 2014
    Publication date: April 23, 2015
    Inventors: Tatsuya YATA, Takayuki NAKANISHI
  • Patent number: 9013502
    Abstract: A method for viewing a simulated light output generated for a first display on a second display includes a variety of steps. First, the simulated light output is generated based on qualities of the first display. Next, the simulated light output is compensated for color differences, temporal differences, luminance differences including gamma difference, and differences in viewing environment between the first and the second display, in real-time. Then, the simulated light output that has been compensated for the differences and for viewing environment is output for the second display.
    Type: Grant
    Filed: December 29, 2011
    Date of Patent: April 21, 2015
    Assignee: Tektronix, Inc.
    Inventor: Kevin M. Ferguson
  • Patent number: 9013503
    Abstract: A device includes converters for converting first image data of an RGB-type into second image data of a YCbCr-type, into third image data of the YCbCr-type, and into fourth image data of the RGB-type, wherein a CbCr-coordinate system has six regions defined by coordinates of a reference color and of six primary colors, and when coordinates of the second image data are located in a region defined by coordinates of the reference color, a first primary color, and a second primary color, the coordinates of the second image data are determined by the coordinates of the reference color, the first primary color, the second primary color, coordinates of a target reference color corresponding to those of the reference color, coordinates of a first target primary color corresponding to those of the first primary color, and coordinates of a second target primary color corresponding to those of the second primary color.
    Type: Grant
    Filed: December 26, 2012
    Date of Patent: April 21, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventor: Won-Woo Jang
  • Publication number: 20150103090
    Abstract: A method that generates a chromakey image and then generates a color corrected, spill suppressed chromakey image. The application identifies the edges of non-transparent objects in the image and determines whether the edges are dark. If the edges are dark, then the application subtracts the color corrected, spill suppressed chromakey image from the chromakey image. The subtraction generates an outline image that includes a bright outline of the objects with the dark edges, while the objects themselves in the outline image are almost entirely black. The application then darkens, based on the outline image, the pixels of the color corrected, spill suppressed chromakey image.
    Type: Application
    Filed: October 14, 2013
    Publication date: April 16, 2015
    Applicant: Apple Inc.
    Inventors: Daniel Pettigrew, Andrew E. Bryant
  • Publication number: 20150103091
    Abstract: Tone and/or gamut mapping apparatus and methods may be applied to map color values in image data for display on a particular display or other downstream device. A mapping algorithm may be selected based on location and/or color coordinates for pixel data being mapped. The apparatus and methods may be configured to map color coordinates differently depending on whether or not a pixel corresponds to a light source in an image and/or has special or reserved color values.
    Type: Application
    Filed: December 19, 2014
    Publication date: April 16, 2015
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventor: Neil W. Messmer