Patents by Inventor Hikaru Ootsuka

Hikaru Ootsuka 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).

  • Image reading apparatus and method of determining gain value and offset value for image reading apparatus
    Patent number: 6967605
    Abstract: An image reading apparatus includes a light source for irradiating an original; a photoelectric converter for converting light reflected from the original to an analog signal; an A/D converter for converting the analog signal corresponding to each pixel from the photoelectric converter to the digital signal; and an adjusting device connected between the photoelectric converter and the A/D converter for performing an offset processing and a gain processing of the analog signal from the photoelectric converter. A memory stores a relational formula representing a correlation between an offset value for the offset processing and a gain value for the gain processing. An offset value calculating device obtains an offset value corresponding to a gain value used in the gain processing of the analog signal by using the gain value and the relational formula stored in the memory.
    Type: Grant
    Filed: July 29, 2004
    Date of Patent: November 22, 2005
    Assignee: Nisca Corporation
    Inventors: Hideya Fujihara, Hikaru Ootsuka
  • Image reading apparatus and method of determining gain value and offset value for image reading apparatus
    Publication number: 20050024246
    Abstract: An image reading apparatus includes a light source for irradiating an original; a photoelectric converter for converting light reflected from the original to an analog signal; an A/D converter for converting the analog signal corresponding to each pixel from the photoelectric converter to the digital signal; and an adjusting device connected between the photoelectric converter and the A/D converter for performing an offset processing and a gain processing of the analog signal from the photoelectric converter. A memory stores a relational formula representing a correlation between an offset value for the offset processing and a gain value for the gain processing. An offset value calculating device obtains an offset value corresponding to a gain value used in the gain processing of the analog signal by using the gain value and the relational formula stored in the memory.
    Type: Application
    Filed: July 29, 2004
    Publication date: February 3, 2005
    Inventors: Hideya Fujihara, Hikaru Ootsuka