Patents by Inventor Hiroshi Nagatsuma

Hiroshi Nagatsuma 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: 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: 8139128
    Abstract: The image capture device includes defect information storage unit in which defective pixel data is stored in advance; signal conversion unit adapted to covert pixel values of an image signal output from image capture unit to pixel values from which defective values are excluded; a defective pixel establishing unit, an image signal storage unit for storing defective values in terms of frame units chronologically and in order of address; and second comparison unit. The first comparison unit acquires defective pixel data in frame units in several increments from the defect information storage unit and compares the data with the image signal; once all of the defective pixel data has been acquired and compared, comparison of the image signal data and the defective pixel data will stop, and a comparison process will be carried out by the second comparison unit.
    Type: Grant
    Filed: July 29, 2009
    Date of Patent: March 20, 2012
    Assignee: Elmo Company, Limited
    Inventors: Hiroshi Nagatsuma, Yasuo Masui, Tadamasa Nakamura, Nobuhiro Ando
  • 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: 20110181736
    Abstract: The presentation device comprises an operation receiving portion adapted to receive an operation for setting a shooting parameter for the purpose of capturing an image, an image capture portion for capturing an image based on the shooting parameter, a transmitting portion for transmitting the captured image wirelessly to an image output device, and a detecting portion for detecting wireless connection status. The operation receiving portion suspends reception of the operations if the detecting portion detects a lost wireless connection.
    Type: Application
    Filed: November 12, 2010
    Publication date: July 28, 2011
    Applicant: ELMO COMPANY, LIMITED
    Inventors: Hiroshi Nagatsuma, Yasuo Masui
  • Publication number: 20110181745
    Abstract: The presentation device comprises an image capture portion for capturing an image, and a transmission portion for wireless serial transmission of the captured images. The image output device comprises a reception portion for wireless serial reception of the images from the presentation device, an output portion for outputting the received images, and a measurement portion for measuring wireless signal strength. The output portion compares the signal strength with a threshold value established through an operation by the user, and if the signal strength exceeds the threshold value, serially outputs the images serially received by the reception portion so as to outputs a moving image, or if signal strength is equal to or less than the threshold value, continuously outputs a single previously received image so as to outputs a still image.
    Type: Application
    Filed: November 12, 2010
    Publication date: July 28, 2011
    Applicant: ELMO COMPANY, LIMITED
    Inventors: Hiroshi Nagatsuma, Yasuo Masui
  • Publication number: 20100026861
    Abstract: The image capture device includes defect information storage unit in which defective pixel data is stored in advance; signal conversion unit adapted to covert pixel values of an image signal output from image capture unit to pixel values from which defective values are excluded; a defective pixel establishing unit, an image signal storage unit for storing defective values in terms of frame units chronologically and in order of address; and second comparison unit. The first comparison unit acquires defective pixel data in frame units in several increments from the defect information storage unit and compares the data with the image signal; once all of the defective pixel data has been acquired and compared, comparison of the image signal data and the defective pixel data will stop, and a comparison process will be carried out by the second comparison unit.
    Type: Application
    Filed: July 29, 2009
    Publication date: February 4, 2010
    Inventors: Hiroshi Nagatsuma, Yasuo Masui, Tadamasa Nakamura, Nobuhiro Ando
  • 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: 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: 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