Patents by Inventor Naoto Tomura

Naoto Tomura 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: 5170441
    Abstract: A registration error detection apparatus which includes a circuit that sums up, for a plurality of adjacent pixels, absolute values of differences between a plurality of image component signals which form a same frame of picture, a circuit which detects the registration error based on the minimum value of the output signals provided by the summing circuit, a first evaluating circuit which evaluates the reliability of the detection result of registration error based on the differential signal between an input test signal and an input reference signal, a second evaluating circuit which evaluates the reliability based on differences between the average value of registration error and individual detection results, a third evaluating circuit which calculates the statistic deviation value of the BPF-processed test signal and the reference signal and evaluating the reliability based on the calculation result, and a circuit which makes a final judgement as to whether the detection result is to be accepted or rejected
    Type: Grant
    Filed: March 12, 1991
    Date of Patent: December 8, 1992
    Assignee: Hitachi Denshi Kabushiki Kaisha
    Inventors: Itaru Mimura, Naoto Tomura