Patents by Inventor Richard M. Friedhoff

Richard M. Friedhoff 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).

  • Differentiation of illumination and reflection boundaries
    Publication number: 20100074539
    Abstract: The present invention provides methods and apparatus for image processing in which brightness boundaries of an image are identified and analyzed in at least two, and more preferably three or more, spectral bands to distinguish illumination boundaries from reflectance boundaries. For example, in one embodiment of the invention, a brightness boundary of the image can be identified as an illumination boundary if at least two wavelength bands of the image exhibit a substantially common shift in brightness across the boundary.
    Type: Application
    Filed: March 23, 2009
    Publication date: March 25, 2010
    Applicant: Tandent Vision Science, Inc.
    Inventor: Richard M. Friedhoff