Patents by Inventor Katsuhiro Nishiwaki

Katsuhiro Nishiwaki has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 8253828
    Abstract: The image capture device includes pixel data acquisition unit for acquiring pixel data of a pixel of interest and neighboring pixels from an image capture element; an edge direction determination unit for determining whether a pattern such as an edge is defined by neighboring pixels centered on the pixel of interest; correction unit; and color interpolation unit. When a pixel of interest is determined by a defective pixel determination unit to be a defective pixel, and is moreover determined by the edge direction determination unit not to lie in an edge direction, the correction unit will correct the pixel of interest to a correction value derived from pixel data of neighboring pixels in a symmetrical array centered thereon. For a pixel of interest that has not been corrected, color interpolation according to the direction the edge will be carried out by the color interpolation unit, using the determination outcome of the edge direction determination unit.
    Type: Grant
    Filed: July 29, 2009
    Date of Patent: August 28, 2012
    Assignee: Elmo Company, Limited
    Inventor: Katsuhiro Nishiwaki
  • Patent number: 8144210
    Abstract: To determine white balance convergence in a reliable manner, a white balance adjustment device for adjusting white balance of an input image supplied sequentially in time is provided. The white balance adjustment device comprises first and second integrating units. Each of the integrating units corrects a color component of a preceding input image based on mutually different correction parameter values. The integrating units respectively compute first and second integration values by integrating corrected color components. The first and second values to be used to correct the color component of a subsequent input image are determined by a correction parameter determining unit. The correction parameter determining unit changes the first and second values according to magnitude relationship between the first and second integration values and a benchmark value of the integration value.
    Type: Grant
    Filed: June 11, 2008
    Date of Patent: March 27, 2012
    Assignee: Elmo Company, Limited
    Inventors: Katsuhiro Nishiwaki, Hiroshi Nagatsuma, Yasuo Masui, Tadamasa Nakamura
  • Patent number: 8045016
    Abstract: To reduce flicker appropriately according to illumination condition of an imaging subject, a video camera is provided. The video camera includes an imaging unit for generating a subject image; a superimposing image generator for generating a superimposing image; an image synthesizer for synthesize the subject image and the superimposing image to generate a synthesized image; a video signal generator for generating a video signal from the synthesized image so as to display the synthesized image. The video camera also includes a flicker reduction unit to reduce flicker caused by luminance fluctuation of a light source. The flicker reduction unit has a plurality flicker reduction modes. The mode setting unit makes the superimposing image generator to generate a settings screen as the superimposing image for assisting selection of one of the flicker reduction modes.
    Type: Grant
    Filed: June 12, 2008
    Date of Patent: October 25, 2011
    Assignee: Elmo Company, Limited
    Inventors: Katsuhiro Nishiwaki, Hiroshi Nagatsuma, Yasuo Masui, Tadamasa Nakamura
  • Publication number: 20100026862
    Abstract: The image capture device includes pixel data acquisition unit for acquiring pixel data of a pixel of interest and neighboring pixels from an image capture element; an edge direction determination unit for determining whether a pattern such as an edge is defined by neighboring pixels centered on the pixel of interest; correction unit; and color interpolation unit. When a pixel of interest is determined by a defective pixel determination unit to be a defective pixel, and is moreover determined by the edge direction determination unit not to lie in an edge direction, the correction unit will correct the pixel of interest to a correction value derived from pixel data of neighboring pixels in a symmetrical array centered thereon. For a pixel of interest that has not been corrected, color interpolation according to the direction the edge will be carried out by the color interpolation unit, using the determination outcome of the edge direction determination unit.
    Type: Application
    Filed: July 29, 2009
    Publication date: February 4, 2010
    Inventor: Katsuhiro Nishiwaki
  • Publication number: 20090027519
    Abstract: A noise reduction device to reduce noise of a video image including multiple input frame images is provided. The noise reduction device includes: a motion detector that detects a dynamic region and a static region other than the dynamic region within the video image; and a temporal smoothing processing unit that generates temporally-smoothed frame images by applying a temporal smoothing process to the multiple input frame images, the temporal smoothing process keeping number of color component contained in each pixel, the each pixel constituting an individual frame image of the multiple input frame images and containing only a part of a plurality of color components. A temporal smoothing level for a static region pixel belonging to the static region is set to be higher than the temporal smoothing level for a dynamic region pixel belonging to the dynamic region.
    Type: Application
    Filed: July 23, 2008
    Publication date: January 29, 2009
    Inventors: Katsuhiro Nishiwaki, Hiroshi Nagatsuma, Yasuo Masui, Tadamasa Nakamura
  • Publication number: 20090016638
    Abstract: In a defective pixel detector 20 mounted on an imaging device 100, a pixel data acquisition module 20a successively obtains pixel data of a target pixel set as an object of defective pixel detection and pixel data of plural surrounding pixels located in a neighborhood of the target pixel. A first operation module 20b calculates absolute values of differences between pixel data of multiple specific peripheral pixels selected among the plural surrounding pixels, as first absolute values. A defective pixel criterion setting module 20c sets a defective pixel criterion, based on differences between the multiple first absolute values and a preset threshold value. A second operation module 20d calculates absolute values of differences between the pixel data of the target pixel and the pixel data the multiple specific peripheral pixels, as second absolute values.
    Type: Application
    Filed: July 2, 2008
    Publication date: January 15, 2009
    Inventors: Hiroshi Nagatsuma, Yasuo Masui, Tadamasa Nakamura, Katsuhiro Nishiwaki
  • Publication number: 20080309790
    Abstract: To determine white balance convergence in a reliable manner, a white balance adjustment device for adjusting white balance of an input image supplied sequentially in time is provided. The white balance adjustment device comprises first and second integrating units. Each of the integrating units corrects a color component of a preceding input image based on mutually different correction parameter values. The integrating units respectively compute first and second integration values by integrating corrected color components. The first and second values to be used to correct the color component of a subsequent input image are determined by a correction parameter determining unit. The correction parameter determining unit changes the first and second values according to magnitude relationship between the first and second integration values and a benchmark value of the integration value.
    Type: Application
    Filed: June 11, 2008
    Publication date: December 18, 2008
    Inventors: Katsuhiro Nishiwaki, Hiroshi Nagatsuma, Yasuo Masui, Tadamasa Nakamura
  • Publication number: 20080309791
    Abstract: To reduce flicker appropriately according to illumination condition of an imaging subject, a video camera is provided. The video camera includes an imaging unit for generating a subject image; a superimposing image generator for generating a superimposing image; an image synthesizer for synthesize the subject image and the superimposing image to generate a synthesized image; a video signal generator for generating a video signal from the synthesized image so as to display the synthesized image. The video camera also includes a flicker reduction unit to reduce flicker caused by luminance fluctuation of a light source. The flicker reduction unit has a plurality flicker reduction modes. The mode setting unit makes the superimposing image generator to generate a settings screen as the superimposing image for assisting selection of one of the flicker reduction modes.
    Type: Application
    Filed: June 12, 2008
    Publication date: December 18, 2008
    Inventors: Katsuhiro Nishiwaki, Hiroshi Nagatsuma, Yasuo Masui, Tadamasa Nakamura
  • Publication number: 20050063587
    Abstract: The present invention is directed to a presentation supporting system with the improved picture quality at colored edges of a resulting image.
    Type: Application
    Filed: February 27, 2004
    Publication date: March 24, 2005
    Inventors: Katsuhiro Nishiwaki, Naoto Makino