Patents by Inventor Ryan K Seghers

Ryan K Seghers 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).

  • Rotation and scale invariant pattern matching method
    Patent number: 6640008
    Abstract: A polar coordinate representation of a template image is projected onto the radius axis and rotation axis. Linear transformation of the radius projection provides multiple templates for rapid one dimensional scale search. Pattern matching of the angular projection onto the rotation axis facilitates rapid one dimensional pattern match for rotation variation. The invention overcomes the speed limitation of the normalized correlation template matching method when the pattern being searched is subject to rotation or size variation. A fast correlation method uses a weighted histogram sum to compute the correlation score.
    Type: Grant
    Filed: June 29, 2001
    Date of Patent: October 28, 2003
    Inventors: Shih-Jong J. Lee, Seho Oh, Ryan K Seghers