Patents by Inventor Narasimha R. Koka

Narasimha R. Koka 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: 4760447
    Abstract: A calibration pattern (FIG. 2) is utilized to adjust the calibration of a video monitor (C) and a multi-format camera (D). The multi-format camera (D) includes a video display (12) and photographic equipment (20) internally therein such that received signals indicative of an image are turned into a photograph. The test pattern includes a first region (30) having a background (34) and a series of holes or dots (36) thereon. Each hole has progressively greater contrast with the first background such that the number of visible holes is indicative of whether the video monitor and multi-format camera are in proper calibration. A second region (40) is similar to the first region but has gray holes on a white background. A third region (50) has a plurality of tuning fork-like subregions having different gray scales levels. The brightness of a fourth region (70) varies sinusoidally. A fifth region (80) has square holes and a sixth region (90) has circular holes.
    Type: Grant
    Filed: July 31, 1986
    Date of Patent: July 26, 1988
    Assignee: Picker International, Inc.
    Inventors: Narasimha R. Koka, William E. Szabo