Gamma Correction Patents (Class 358/519)
  • Patent number: 10313564
    Abstract: System(s) and method(s) for controlling a rate of consumption of printing material are described. The method includes receiving an image to be printed or copied and converting the image into a plurality of pixels. A value of a pixel, from among the plurality of pixels, is compared with a predefined threshold value. When the value of the pixel is below the predefined threshold value, a black pixel indicative of a pixel with printing material is generated. An error between the value of the pixel and a value of the black pixel is determined. The error value is multiplied by a gain value and then the weighted value of resultant is distributed among neighborhood pixels. The gain value is varied to control the rate of consumption of the printing material, as the consumption of the printing material is reduced when the gain value is increased.
    Type: Grant
    Filed: June 15, 2018
    Date of Patent: June 4, 2019
    Assignee: XEROX CORPORATION
    Inventors: Dhevendra Alagan Palanivel, Sudhagar Subbaian, Sainarayanan Gopalakrishnan
  • Patent number: 10291818
    Abstract: A calculator performs in parallel gamma correction calculations on gray level values 1 to Z depending on each of target nozzles for each of target pixels containing gray level values other than zero of pixels in image data to be printed by a multi-drop inkjet head including nozzles and having a maximum droplet number Z per pixel, the nozzles of the multi-drop inkjet head including the target nozzles for ink ejection on the respective target pixels. A selector selects a calculation result corresponding to a gray level value of the target pixel from calculation results of the gamma correction calculations performed on the gray level values 1 to Z by the calculator, for each of the target pixels.
    Type: Grant
    Filed: August 25, 2017
    Date of Patent: May 14, 2019
    Assignee: RISO KAGAKU CORPORATION
    Inventor: Yasutaka Sasaki
  • Patent number: 10140900
    Abstract: A data driver includes a gamma unit, a digital-to-analog converter, and an output buffer. The gamma unit receives at least one reference voltage, and generates a first gamma reference voltage corresponding to a first sub-pixel and a second gamma reference voltage corresponding to a second sub-pixel using the received at least one reference voltage. The digital-to-analog converter receives the first and second gamma reference voltages from the gamma unit, and generates a first gamma data value corresponding to the first sub-pixel using the first gamma reference voltage and a second gamma data value corresponding to the second sub-pixel using the second gamma reference voltage. The output buffer outputs a first frame including the first gamma data value and a second frame including the second gamma data value. The output buffer outputs the first and second frames in a repeated manner for every predetermined number of frames.
    Type: Grant
    Filed: February 8, 2016
    Date of Patent: November 27, 2018
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Won Tae Kim, Soo Yeon Kim, Young Il Ban, Sun Kyu Son
  • Patent number: 9860423
    Abstract: There are provided image processing device and method, a printing system, a halftone process determination method, and a program capable of determining a processing rule of an appropriate halftone process appropriate for characteristics of a printing system. An image processing device (20) according to the present invention includes characteristic parameter acquisition means (52) for acquiring characteristic parameters related to characteristics of a printing system, and halftone process generation means (58) for generating halftone processing rules that define the processing contents of two or more kinds of halftone processes of which balances of priority for a plurality of requirements required in the halftone process are different based on the characteristic parameters acquired by the characteristic parameter acquisition means (52).
    Type: Grant
    Filed: September 26, 2016
    Date of Patent: January 2, 2018
    Assignee: FUJIFILM CORPORATION
    Inventor: Kimito Katsuyama
  • Patent number: 9836676
    Abstract: A color image processing apparatus includes an image forming unit configured to form a color image using recording materials of plural colors, an image processing unit configured to implement plural image processing methods that achieve plural types of pseudo-halftone representations, a color measurement unit configured to perform color measurement of the color image formed by the image forming unit, and a control unit configured to control execution of multi-color calibration in which the color measurement unit performs color measurement of a pattern image including plural multi-color patch images formed using recording materials of plural colors by using a smaller number of image processing methods than plural image processing methods used in single-color calibration for correcting reproduction characteristics of single-color images formed by the image forming unit and in which reproduction characteristics of a multi-color image formed by the image forming unit are corrected using a result of the color meas
    Type: Grant
    Filed: June 23, 2015
    Date of Patent: December 5, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventor: Asako Hashizume
  • Patent number: 9625865
    Abstract: An image forming apparatus includes an image bearer that bears a toner image, a sensor, an adhesion amount calculator, and a wavelength determiner. The sensor includes a light source that emit light onto the image bearer, and an image element that detects reflected light that is emitted from the light source and reflected from the image bearer. The adhesion amount calculator calculates a toner adhesion amount of the toner image on the image bearer based on the reflected light having at least one wavelength among a plurality of wavelengths detected by the sensor. The wavelength determiner determines, based on color information of the image bearer detected by the sensor, a wavelength to be used in calculation of the toner adhesion amount by the adhesion amount calculator.
    Type: Grant
    Filed: February 24, 2016
    Date of Patent: April 18, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Natsumi Matsue, Kohta Fujimori, Kayoko Tanaka
  • Patent number: 9420145
    Abstract: A method and imaging device are provided. An image is divided into N zones, and a histogram is generated for each of the N zones. A tone curve is determined for each of the N zones, where tone curve parameters including the controlling of shape and transition point of the curve are based on the histogram of each zone. A tone-mapped value for each pixel of the image is determined based on a sum of M weighted values determined by applying tone curves of M zones to a value of the pixel.
    Type: Grant
    Filed: December 16, 2014
    Date of Patent: August 16, 2016
    Assignee: MARVELL WORLD TRADE LTD.
    Inventor: Huai Dong Li
  • Patent number: 9218553
    Abstract: An image forming apparatus includes a luminance information acquiring unit, a hue information substituting unit, and a color conversion unit. The luminance information acquiring unit is configured to acquire input luminance information of inputted multi-gradation monochromatic image data. The hue information substituting unit is configured to substitute the acquired input luminance information with hue information to generate hue data. The color conversion unit is configured to convert the hue data into a color space for printing to generate multi-gradation color image data.
    Type: Grant
    Filed: September 25, 2014
    Date of Patent: December 22, 2015
    Assignee: Kyocera Document Solutions Inc.
    Inventor: Masaru Matsuo
  • Patent number: 9055335
    Abstract: A system, method and computer program utilize a distance associative hashing algorithmic means to provide a highly efficient means to rapidly address a large database. The indexing means can be readily subdivided into a plurality of independently-addressable segments where each such segment can address a portion of related data of the database where the sub-divided indexes of said portions reside entirely in the main memory of each of a multiplicity of server means. The resulting cluster of server means, each hosting an addressable sector of a larger database of searchable audio or video information, provides a significant improvement in the latency and scalability of an Automatic Content Recognition system, among other uses.
    Type: Grant
    Filed: March 17, 2014
    Date of Patent: June 9, 2015
    Assignee: Cognitive Networks, Inc.
    Inventors: Zeev Neumeier, Brian Reed
  • 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: 9025204
    Abstract: An image creating apparatus has a printing device configured to print a changed image on a recording medium; a difficult-to-recognize color arrangement storage unit configured to store a difficult-to-recognize color arrangement that is difficult to visually recognize; an object extracting unit configured to extract objects from an original image; a difficult-to-recognize object detecting unit configured to detect a difficult-to-recognize object; a representative color obtaining unit configured to obtain the representative color of the difficult-to-recognize object; a color arrangement changing unit configured to (i) change the color arrangement of the image so that the color arrangement of the periphery is changed from the difficult-to-recognize color arrangement in at least part of the difficult-to-recognize object and (ii) embed information about the representative color as dots; and a changed image printing unit configured to command the printing device to print the changed image with the changed color arr
    Type: Grant
    Filed: August 10, 2014
    Date of Patent: May 5, 2015
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Yoshitaka Kishi
  • 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
  • Patent number: 9007668
    Abstract: In an image reading system, when an automatic determination mode is designated as a color mode, a scanner does not determine the color of the read image but applies gamma correction to the image data of the image using the first correction characteristic. The scanner transmits the resultant image data to a PC. The PC determines the color of the image indicated by the received image data. When the determined color does not correspond to the first correction characteristic, the PC performs gamma correction of the received image data in accordance with the inverse characteristic of the first correction characteristic and then performs gamma correction using the second correction characteristic corresponding to the determined color.
    Type: Grant
    Filed: October 2, 2013
    Date of Patent: April 14, 2015
    Assignee: Canon Denshi Kabushiki Kaisha
    Inventors: Toshifumi Jittou, Kouji Miyanishi
  • Patent number: 9001141
    Abstract: An apparatus and method for providing display information generates, independently from an operating system, different screen subsections of a screen image using independent gamut remapping configurations to generate an output image in a target gamut space of a display. The method and apparatus also provides the generated output image for display or may display the generated output image.
    Type: Grant
    Filed: September 24, 2012
    Date of Patent: April 7, 2015
    Assignee: ATI Technologies ULC
    Inventors: David I. J. Glen, Jie Zhou
  • Patent number: 8988452
    Abstract: Systems, apparatus, articles, and methods are described including operations for color enhancement via gamut expansion.
    Type: Grant
    Filed: December 20, 2012
    Date of Patent: March 24, 2015
    Assignee: Intel Corporation
    Inventors: Ya-Ti Peng, Yi-Jen Chiu
  • Patent number: 8963945
    Abstract: A red, green, and blue (RGB) primary generation system and method for a wide color gamut, and a color encoding system using the RGB primaries. The RGB primary generation system may achieve a wide color gamut by generating a color gamut having a gamut coverage which meets a gamut coverage threshold, meeting a unique hue, having a maximum gamut efficiency, and a minimum quantization error.
    Type: Grant
    Filed: September 17, 2010
    Date of Patent: February 24, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Yun-Tae Kim, Seo Young Choi, Ho Young Lee, Du-Sik Park, Ji Young Hong
  • Patent number: 8937753
    Abstract: An image scanning apparatus includes a scanning unit configured to scan an original document and generate a scanned image, a storage unit configured to store the generated scanned image, an image processor including a plurality of image processing modules, the plurality of image processing modules separately including a plurality of buffers configured to store the scanned image of block units, and configured to read the generated scanned image in preset block units and perform image processing on the scanned image read in block units sequentially using the plurality of image processing modules, and a controller configured to store the image-processed scanned image in the storage unit.
    Type: Grant
    Filed: June 3, 2013
    Date of Patent: January 20, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Eul-hwan Lee
  • Patent number: 8902470
    Abstract: An image processing apparatus includes: a multi-level unit that applies a multi-level process on binary halftone dot image data indicating a binary halftone dot image, to form multi-level image data; an acquiring unit that acquires a number of screen lines of the binary halftone dot image data; a tone correcting unit that determines a tone correction amount corresponding to the number of screen lines of the binary halftone dot image data acquired by the acquiring unit, and that applies tone correction on the multi-level image data produced by the multi-level unit, by using the determined tone correction amount; and a re-binarizing unit that binarizes the multi-level image data in which the tone is corrected by the tone correcting unit, without changing a halftone dot shape of the binary halftone dot image data, to produce re-binarized halftone dot image data.
    Type: Grant
    Filed: April 19, 2013
    Date of Patent: December 2, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Toru Misaizu, Kenji Hara, Shigeru Arai, Kota Matsuo
  • Patent number: 8896619
    Abstract: An apparatus is provided that includes a processor and memory storing executable instructions that in response to execution by the processor cause the apparatus to at least perform a number of operations. The apparatus is caused to receive a digital image including pixels each of which has a pixel value that has been calibrated according to a first calibration function for calibrating an image for display by a first monitor. The apparatus is caused to transform the pixel value of each of at least some of the pixels to a corresponding transformed pixel value calibrated according to a second calibration function for calibrating an image for display by a second monitor. The apparatus is also caused to cause output of the digital image including the plurality of pixels each of at least some of which has a transformed pixel value, the respective digital image being displayable by the second monitor.
    Type: Grant
    Filed: March 9, 2011
    Date of Patent: November 25, 2014
    Assignee: McKesson Financial Holdings
    Inventor: Mahmoud Ramze Rezaee
  • Patent number: 8891131
    Abstract: A system including an image data source and a transfer function module. The image data source is configured to provide image data. The transfer function module is configured to generate a transfer function to process the image data, define a first region of the transfer function, wherein a curvature of the transfer function in the first region is less than or equal to a threshold, define a second region of the transfer function, wherein a curvature of the transfer function in the second region is greater than the threshold, allocate a first number of sample inputs to the first region, allocate a second number of the sample inputs to the second region, wherein the second number is greater than the first number, map the sample inputs to sample outputs using the transfer function, and populate entries of a lookup table with the sample outputs.
    Type: Grant
    Filed: February 26, 2014
    Date of Patent: November 18, 2014
    Assignee: Marvell International Ltd.
    Inventors: Bradley C. Aldrich, Moinul H. Khan, Kayla L. Chalmers
  • Patent number: 8879128
    Abstract: An image reading apparatus is disclosed. The image reading apparatus includes an automatic document feeding unit that transports a document in a predetermined direction while the document floats above a platen glass member and a light source disposed below the platen glass member that irradiates a portion on the document at a predetermined reading location such that reflected light from the portion on the document is converted into image data and a floating distance between the document and the platen glass member is detected to set a value of an image parameter for correcting the image data for the document, based on the detected floating distance between the document and the platen glass member.
    Type: Grant
    Filed: May 10, 2007
    Date of Patent: November 4, 2014
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Toshikazu Higashi, Masahiro Nonoyama
  • Patent number: 8866839
    Abstract: A signal adapting chromacity system to control that may include a signal conversion engine to receive a source signal designating a color of light defined by a two spatial plus luminance dimensional color space, such as the xxY color space. The signal conversion engine may convert the source signal to a three dimensional color space defined within a subset gamut of a full color gamut, such as an RGW, RBW, or GBW color space. The subset gamut may include a first color light, a second color light and a high efficacy light. The signal conversion engine may perform a conversion operation to convert the source signal to an output signal, using the output signal to drive light emitting diodes (LEDs). The conversion operation may be a matrix, angular or linear conversion operation.
    Type: Grant
    Filed: July 31, 2013
    Date of Patent: October 21, 2014
    Assignee: Lighting Science Group Corporation
    Inventors: Fredric S. Maxik, Robert R. Soler, David E. Bartine, Ran Zhou, Valerie A. Bastien, Matthew Regan, Eliza Katar Grove, Eric Bretschneider
  • Patent number: 8866835
    Abstract: A color adjustment system for a display device includes a computer device, and a display device for displaying an image. The display device selectably displays a plurality of color temperature color presets. The computer device makes a white point adjustment to the display device, based on a color temperature color preset selected from among the plurality of color temperature color presets by a selecting operation from the computer device.
    Type: Grant
    Filed: October 1, 2009
    Date of Patent: October 21, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hideki Tanizoe, Hidenori Sakai, Yasuhiro Arakawa, Hiroshi Ueno
  • Patent number: 8860747
    Abstract: System and methods for gamut bounded saturation adaptive color enhancement are provided. Color enhancement incorporating gamut bounded saturation enhances colors of an pixel from a source color gamut such that the resulting color is within a target color gamut. This resulting color may, for example, take advantage of an expanded target color gamut of a display. Gamut bounded saturation may be implemented independently or in combination with RGB bounded saturation.
    Type: Grant
    Filed: September 3, 2013
    Date of Patent: October 14, 2014
    Assignee: Marvell World Trade Ltd.
    Inventors: Vasudev Bhaskaran, Sujith Srinivasan, Nikhil Balram
  • Patent number: 8842349
    Abstract: A tincture adjustment value used to adjust a monochrome signal to a tincture desired by a user is set, and a tincture conversion table and chromaticity line table are generated based on that tincture adjustment value and the profile of an image output apparatus. Using the generated tables, a lightness signal L* corresponding to an input monochrome signal is converted into a distance signal l on a chromaticity line, and the distance signal l is converted into a chromaticity signal (a*, b*). The lightness signal L* and chromaticity signal (a*, b*) are converted into a color signal of the image output apparatus.
    Type: Grant
    Filed: June 8, 2010
    Date of Patent: September 23, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takuya Shimada
  • Patent number: 8842907
    Abstract: In a first exemplary embodiment of the present invention, an automated, computerized method is provided for processing an image. According to a feature of the present invention, the method comprises the steps of providing an image file depicting an image defined by image locations, in a computer memory, generating a bi-illuminant chromaticity plane in a log color space for representing the image locations of the image in a log-chromaticity representation for the image, calculating a set of log-chromaticity cluster maps, each based upon an estimate for an orientation of the bi-illuminant chromaticity plane selected from a set of estimates and including a cluster for each one of the image locations, and merging the set of log-chromaticity cluster maps to obtain a single, merged log-chromaticity cluster map.
    Type: Grant
    Filed: August 17, 2012
    Date of Patent: September 23, 2014
    Assignee: Tandent Vision Science, Inc.
    Inventor: Patrick Buehler
  • Patent number: 8823726
    Abstract: Some embodiments provide a program that performs a color balance operation. The program identifies an image that includes several pixels. Each pixel includes a luma component value and chroma component values. The program analyzes the luma component values of the pixels in the image to identify several luma ranges. The program determines, for each luma range in the several luma ranges, a set of transforms for modifying chroma component values of pixels in the image in order to remove a color cast from the image. The program applies the sets of transforms to the image to remove the color casts from the image.
    Type: Grant
    Filed: June 3, 2011
    Date of Patent: September 2, 2014
    Assignee: Apple Inc.
    Inventors: Daniel Pettigrew, Andrew Bryant, James C. Arndt, Olivier Fedkiw, Ryan A. Gallagher
  • Patent number: 8817039
    Abstract: Provided is an image processing device which enables image display that takes full advantage of a color reproduction performance of a panel without providing a viewer with a feeling of strangeness. An image processing device includes: a color gamut conversion processor configured to convert inputted data into RGB data according to a liquid crystal panel; a weighting factor calculator configured to calculate a weighting factor; a first post-color-gamut-conversion data weighting processor configured to perform weighting processing to the RGB data; an inputted data weighting processor configured to perform weighting processing to the inputted data; and an output adder configured to add data after the weighting processing to generate RGB data to be supplied to the liquid crystal panel.
    Type: Grant
    Filed: February 8, 2010
    Date of Patent: August 26, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Xiaomang Zhang, Akiko Yoshida
  • Patent number: 8804209
    Abstract: An image processing apparatus including, an input unit for inputting image data including a document region, a storage for storing the brightness of each pixel on a first main scan line outside the document region, a corrector for correcting the brightness of each pixel on the first main scan line in accordance with the brightness of pixels in a first part and the brightness of pixels in a second part on a second main scan line following the first main scan line, and an edge point detector for detecting an edge point of the document region situated on the second main scan line in accordance with the difference between the brightness of each pixel on the first main scan line corrected and the brightness of each pixel on the second main scan line respectively corresponding to each pixel on the first main scan line.
    Type: Grant
    Filed: December 13, 2012
    Date of Patent: August 12, 2014
    Assignee: PFU Limited
    Inventors: Akira Iwayama, Masayoshi Hayashi
  • Patent number: 8804199
    Abstract: An image processing apparatus connected via a network to a plurality of image forming apparatuses that implement a first gradation correction, or a second gradation correction. The image processing apparatus includes a selection unit configured to select the first gradation correction or second gradation correction, for each of the connected plurality of image forming apparatuses, an instruction unit configured to send an instruction to an image forming apparatus for which a first gradation correction has been selected by the selection unit, a reading unit configured to read out patch patterns that have been printed by the image forming apparatus for which the second gradation correction has been selected, and a transmission unit configured to transmit data for correcting readout values of the patch patterns to the image forming apparatus for which the second gradation correction has been selected.
    Type: Grant
    Filed: November 15, 2010
    Date of Patent: August 12, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventor: Osamu Iinuma
  • Patent number: 8797346
    Abstract: A gamma correction system and method for a display device are disclosed. According to one aspect, the gamma correction system includes a display panel configured to display an image, a measuring unit configured to acquire optical characteristic information from the image displayed on the display panel, and a display panel driver configured to convert a gamma data result value obtained after performing optical compensation for at least two sample gray values among a plurality of reference luminance values into a corresponding data voltage and calculate a data voltage for the rest of the luminance values for which optical compensation is not performed.
    Type: Grant
    Filed: March 14, 2012
    Date of Patent: August 5, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Sung-Un Park, Ji-Yun Son, Dong-Ho Yoon
  • Patent number: 8786898
    Abstract: It is determined whether an entered designated color is a color within a gamut of a printing machine or not. If the designated color is judged as being not a color within the gamut, then the designated color is mapped to converted colors within the gamut according to a plurality of gamut mapping processes. One of the gamut mapping processes which corresponds to one of the converted colors is selected. If the designated color is judged as being a color within the gamut, the designated color is set as a reference color. If the designated color is judged as being not a color within the gamut, then the selected one of the converted colors is set as the reference color.
    Type: Grant
    Filed: September 17, 2010
    Date of Patent: July 22, 2014
    Assignee: FUJIFILM Corporation
    Inventor: Takeshi Katayama
  • Patent number: 8786881
    Abstract: A printing apparatus comprising: a printing unit configured to print an image based on expanded data; a measuring unit configured to measure a deviation amount of at least one of a position and a density of the image printed by the printing unit when a correction execution condition is satisfied; an expanding unit configured to expand print data based on the measurement by the measuring unit, so as to produce the expanded data; and a control unit, wherein when the correction execution condition is satisfied during the expanding of current print data which corresponds to a current page being expanded, the control unit is configured to control the expanding unit to suspend the expanding of the current print data, the measuring unit to measure the deviation amount, and the expanding unit to restart expanding an unexpanded portion of the current print data based on the measurement.
    Type: Grant
    Filed: March 7, 2011
    Date of Patent: July 22, 2014
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Akihiro Yamada
  • Patent number: 8780273
    Abstract: There is a signal processing apparatus, including a gamma correction circuit that performs gamma correction on an input luminance signal and generates an output luminance signal, an output-to-input ratio calculation circuit that calculates a ratio of the output luminance signal to the input luminance signal as an output-to-input ratio of a luminance signal, and a color difference correction circuit that multiplies an input color difference signal by the output-to-input ratio of the luminance signal and generates an output color difference signal. As a result, by correcting the input color difference signal using the output-to-input ratio of the luminance signal, the output color difference signal in which color difference correction has been performed in view of influence of gamma correction can be generated.
    Type: Grant
    Filed: August 16, 2011
    Date of Patent: July 15, 2014
    Assignee: Sony Corporation
    Inventors: Kiyoshi Ikeda, Toshimichi Hamada, Yoichi Hirota
  • Patent number: 8736904
    Abstract: An image forming system includes: a plurality of image forming apparatus each having a storage section; a density conversion data registering section obtaining density conversion data composed of a combination of a voltage value and a density value as colorimetry results of a color sensor and an external colorimeter, respectively, and storing the data into the storage section of the apparatus which forms a density correcting chart to be used for the colorimetry; a paper setting section storing a tray paper profile or a paper profile into a paper setting storage section, with the profiles correlated with at least one piece of the data obtained by the density conversion data registering section; and a correction controlling section making the plurality of image forming apparatus perform printer ? correction based on the data correlated with the paper profile or the tray paper profile at a time of the image formation.
    Type: Grant
    Filed: November 8, 2011
    Date of Patent: May 27, 2014
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventor: Ken Miyazaki
  • Patent number: 8705130
    Abstract: An image formation device includes a printing portion containing a detachable fixer, a fixer identification portion which identifies a type of fixer mounted on the image formation device, a sensor which reads an image printed on a paper by the printing portion, a gamma correction data generating portion which generates gamma correction data by reading a gamma correction chart printed on a paper by the printing portion and stores the generated gamma correction data in a memory medium such that the gamma correction data is associated with a type of the fixer and a type of the paper that are used for printing the gamma correction chart, and printer gamma correction portion which performs printer gamma correction on an image data to be printed based on the gamma correction data stored in the memory medium corresponding to the paper type and the fixer type used for printing.
    Type: Grant
    Filed: October 17, 2012
    Date of Patent: April 22, 2014
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventor: Ken Miyazaki
  • Patent number: 8705135
    Abstract: A display control apparatus according to an embodiment of the present invention includes: a grayscale converting circuit for converting input image data to output image data using a look-up table showing a correspondence between input image data of i bits and output image data of k bits larger than the i bits; and an LUT creating circuit for creating the look-up table based on ? data of 2k bits. The apparatus further includes a ? data storage circuit capable of storing the plural ? data in the LUT creating circuit.
    Type: Grant
    Filed: April 20, 2006
    Date of Patent: April 22, 2014
    Assignee: Renesas Electronics Corporation
    Inventors: Hirobumi Furihata, Takashi Nose
  • Patent number: 8699104
    Abstract: The present disclosure relates to an image scanner and an image forming apparatus equipped with the image scanner, and more particularly to a technique of detecting that dew condensation occurs on a transparent member for placing a document thereon.
    Type: Grant
    Filed: May 30, 2012
    Date of Patent: April 15, 2014
    Assignee: Kyocera Document Solutions Inc.
    Inventor: Akira Shimatani
  • Patent number: 8681375
    Abstract: Image data used for printing a designated color adjusting color chart having color patches with a printing machine are generated, color values and positions of the color patches being associated with each other. A patch selection image simulating the positions of the color patches on the color chart is displayed. Coordinates corresponding to the position of a color that has been selected as a color that is closest to the designated color from the color patches of the color chart, are indicated on the displayed patch selection image. Color values of the color that is closest to the designated color are calculated based on the color values and positions that are associated with each other and the indicated coordinates.
    Type: Grant
    Filed: September 20, 2010
    Date of Patent: March 25, 2014
    Assignee: FUJIFILM Corporation
    Inventors: Takeshi Katayama, Eiji Teraue
  • Publication number: 20140071505
    Abstract: In an image reading system, when an automatic determination mode is designated as a color mode, a scanner does not determine the color of the read image but applies gamma correction to the image data of the image using the first correction characteristic. The scanner transmits the resultant image data to a PC. The PC determines the color of the image indicated by the received image data. When the determined color does not correspond to the first correction characteristic, the PC performs gamma correction of the received image data in accordance with the inverse characteristic of the first correction characteristic and then performs gamma correction using the second correction characteristic corresponding to the determined color.
    Type: Application
    Filed: October 2, 2013
    Publication date: March 13, 2014
    Applicant: Canon Denshi Kabushiki Kaisha
    Inventors: Toshifumi JITTOU, Kouji MIYANISHI
  • Patent number: 8665486
    Abstract: Transfer functions are often used for image processing. Look-up tables can be used to implement transfer functions in a processor-efficient manner. In one embodiment, the invention is an apparatus that includes a look-up table (LUT) storing sample outputs from an output range of a transfer function, the sample outputs corresponding to sample inputs from an input range of the transfer function, the sample inputs being distributed so that more sample inputs are associated with a first region of the transfer function than a second region of the transfer function; and an address module to calculate an index into the LUT based on image data. In one embodiment, the apparatus uses the LUT to process the image data.
    Type: Grant
    Filed: March 29, 2004
    Date of Patent: March 4, 2014
    Assignee: Marvell International Ltd.
    Inventors: Bradley C. Aldrich, Moinul H. Khan, Kayla L. Chalmers
  • Patent number: 8649064
    Abstract: In order to correct image files to be printed in a printing device, there is provided a printing device including: an inputting unit that is configured to be capable of inputting an image file representing a motion image; a generating unit that is configured to extract a plurality of frame images from the image file and to generate a first output image in which the plurality of extracted frame images are laid out on a single page; correcting unit that is configured to correct the first output image and to generate a first corrected output image; and a printing unit that is configured to be capable of printing the first corrected output image.
    Type: Grant
    Filed: November 25, 2009
    Date of Patent: February 11, 2014
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Tomohiko Hasegawa
  • Patent number: 8638481
    Abstract: An optical writing control apparatus controls a light source to draw a correction pattern for correcting a parameter value of an image forming mechanism, detects the correction pattern transferred onto a conveyance member from a photosensitive member based on an output signal of a sensor, and corrects the parameter value based on the detected correction pattern; stores chromatic color progress information indicating a progress for a chromatic color mechanism corresponding to a chromatic color image occurring from when the correction operation was carried out and achromatic color progress information indicating a progress for an achromatic color mechanism corresponding to an achromatic color image occurring from when the correction operation was carried out; and stores a necessary threshold to determine that the correction operation is necessary and an unnecessary threshold to determine that the correction operation is unnecessary for the chromatic color progress information and the achromatic color progress i
    Type: Grant
    Filed: March 10, 2011
    Date of Patent: January 28, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Tatsuya Miyadera, Yoshinori Shirasaki, Tomohiro Ohshima
  • Patent number: 8633951
    Abstract: A display drive circuit of the invention has: an initial-color-gamut-apex-coordinate-storing unit capable of storing initial color gamut apex coordinates; a user-target-color-gamut-apex-coordinate-storing unit capable of storing user target color gamut apex coordinates; a saturation-expansion-coefficient-deciding unit for deciding expansion coefficients of saturation data based on the initial and user target color gamut apex coordinates; and an expansion unit for expanding saturations of display data based on the saturation expansion coefficients. The expansion coefficients of saturation data are decided based on the initial and user target color gamut apex coordinates, and saturations of display data are expanded according to the expansion coefficients. Thus, the degree of expanding the saturations can be controlled for each color gamut or each of R, G and B color properties of an LC display panel.
    Type: Grant
    Filed: November 26, 2012
    Date of Patent: January 21, 2014
    Assignee: Renesas Electronics Corporation
    Inventors: Yoshiki Kurokawa, Yasuyuki Kudo, Hiroyuki Nitta, Kazuki Homma, Junya Takeda
  • Patent number: 8625179
    Abstract: Disclosed is a color adjustment method for each of image forming apparatuses, including: a gradation pattern creation step of forming a gradation pattern image including patches different in gradation for each of colors in n pieces of coloring materials; a density detection step of detecting densities of the respective patches, and obtaining density information; a gamma curve creation step of associating the density information of the respective patches in a second image forming apparatus with that in the first, and creating a gamma curve correcting a gradation of received image data so as to obtain densities of the respective patches in the first image forming apparatus; and a color adjustment step of extracting respective color components, deciding output values based on the gamma curve corresponding to the second image forming apparatus, creating output image data, and forming an image on a sheet in the second image forming apparatus.
    Type: Grant
    Filed: February 13, 2012
    Date of Patent: January 7, 2014
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventor: Kazuomi Sakatani
  • Patent number: 8559082
    Abstract: An image processing apparatus includes an integer-part converting unit configured to convert multi-level image data into integer image data by referring to a first conversion table, a threshold setting unit configured to generate matrix data for performing area coverage modulation by referring to the multi-level image data, a decimal-part converting unit configured to convert the multi-level image data into decimal image data by referring to a second conversion table, a level reducing unit configured to reduce levels of the decimal image data by using a threshold generated in the threshold setting unit, an adding unit configured to add the integer image data to the level-reduced decimal image data and outputting a result of addition as gamma conversion image data, and an image processing unit configured to perform image processing on the gamma conversion image data.
    Type: Grant
    Filed: August 21, 2009
    Date of Patent: October 15, 2013
    Assignee: Ricoh Company, Ltd.
    Inventor: Takeshi Ogawa
  • Patent number: 8553285
    Abstract: In image processing according to the prior art, the important part of photographic image data (referred to herein as the object) could not be determined and therefore required human participation. A computer 21 which is the core of image processing calculates an edginess which is an image variation from a differential value of data for adjacent picture elements in a step SA110, and determines object picture elements by selecting only images with a large variation in steps SA120, SA130. As optimum parameters for contrast correction and lightness compensation are calculated from image data for object picture elements in steps SA310-SA330, image processing indicators based on object picture elements are determined, and optimum image processing can be performed automatically.
    Type: Grant
    Filed: April 6, 2011
    Date of Patent: October 8, 2013
    Assignee: Seiko Epson Corporation
    Inventors: Naoki Kuwata, Yoshihiro Nakami
  • Patent number: 8542246
    Abstract: A color conversion device generates color data in a second color gamut based on first converted color data and input color data, which are obtained from input color data in a first color gamut, and outputs the color data in the second color gamut. The color conversion device includes a first color mapping unit which generates the first converted color data by mapping the input color data into the second color gamut; a color mixing unit which generates color data by mixing the first converted color data and second converted color data at a ratio corresponding to the first color gamut and the second color gamut; and a color data output unit which outputs the color data.
    Type: Grant
    Filed: March 11, 2009
    Date of Patent: September 24, 2013
    Assignee: Panasonic Corporation
    Inventors: Katsuo Saigo, Hiroshi Miyai, Hisakazu Hitomi, Masanobu Inoe, Masahiro Kawashima, Akihiro Takeuchi
  • Patent number: 8538086
    Abstract: An image inspection apparatus that compares a reference image with an inspection image obtained by scanning a printed medium on which the reference image has been printed, to determine whether the printed medium is acceptable is provided. The image inspection apparatus includes a first inspecting unit that compares the reference image exclusive of an edge in the reference image with the inspection image exclusive of an edge in the inspection image to perform inspection; a line-image detecting unit that detects a line image that contains the edge from each of the reference image and the inspection image; a second inspecting unit that compares the line image detected from the reference image with the line image detected from the inspection image to perform inspection; and a determining unit that determines whether the printed medium is acceptable based on results of these inspections.
    Type: Grant
    Filed: August 27, 2010
    Date of Patent: September 17, 2013
    Assignee: Ricoh Company, Limited
    Inventor: Shinji Yamakawa
  • Patent number: 8537177
    Abstract: System and methods for gamut bounded saturation adaptive color enhancement are provided. Color enhancement incorporating gamut bounded saturation enhances colors of an pixel from a source color gamut such that the resulting color is within a target color gamut. This resulting color may, for example, take advantage of an expanded target color gamut of a display. Gamut bounded saturation may be implemented independently or in combination with RGB bounded saturation.
    Type: Grant
    Filed: June 15, 2010
    Date of Patent: September 17, 2013
    Assignee: Marvell World Trade Ltd.
    Inventors: Vasudev Bhaskaran, Sujith Srinivasan, Nikhil Balram