Patents by Inventor Naohiko Kamae

Naohiko Kamae 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).

  • Picture signal coding apparatus
    Patent number: 4205341
    Abstract: A frame of a gray-scaled picture is divided into blocks, in each of which the mean luminance of picture elements is used as a threshold value for comparison with each picture element signal to classify it into 0 or 1 according to its magnitude to provide a resolution component. From the resolution component and each picture element signal in the block are calculated two gray components; the resolution component and the two gray components are used as coded outputs for each block. The size of each block is changed in accordance with the property of the picture in the portion corresponding to the block.
    Type: Grant
    Filed: November 14, 1978
    Date of Patent: May 27, 1980
    Assignee: Nippon Telegraph and Telephone Public Corporation
    Inventors: Eiji Mitsuya, Tomio Kishimoto, Katsusuke Hoshida, Naohiko Kamae