Patents by Inventor Lloyd M. Caldwell

Lloyd M. Caldwell 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).

  • Positive patient identification
    Patent number: 7436986
    Abstract: A process and an enabling system and associated devices are directed to automatically and positively identifying a person based upon a matching comparison between a stored, historical iris recognition-based record and a contemporaneously obtained record. The algorithm involves identifying anchor features in selected regions of an iris image and mapping an iris pattern associated with the anchor features into a topologically consistent flat analysis space. Analysis according to the invention generates historical (reference) and contemporaneous Iris Feature Vectors for individuals upon which matching comparisons can be made to positively identify an individual from the reference base.
    Type: Grant
    Filed: March 25, 2003
    Date of Patent: October 14, 2008
    Assignee: Bausch & Lomb Incorporated
    Inventor: Lloyd M. Caldwell
  • Positive patient identification
    Publication number: 20040190759
    Abstract: A process and an enabling system and associated devices are directed to automatically and positively identifying a person based upon a matching comparison between a stored, historical iris recognition-based record and a contemporaneously obtained record. The algorithm involves identifying anchor features in selected regions of an iris image and mapping an iris pattern associated with the anchor features into a topologically consistent flat analysis space. Analysis according to the invention generates historical (reference) and contemporaneous Iris Feature Vectors for individuals upon which matching comparisons can be made to positively identify an individual from the reference base.
    Type: Application
    Filed: March 25, 2003
    Publication date: September 30, 2004
    Inventor: Lloyd M. Caldwell
  • Image registration system and method
    Patent number: 6658282
    Abstract: An apparatus for registering a series of video images of a spherical or quasi-spherical surface subject to movement relies on projecting at least four diffusely scattering spots of light on the surface in a preferred angular manner, and monitoring the movement of images of the light spots relative to a reference image of the light spots.
    Type: Grant
    Filed: December 19, 2002
    Date of Patent: December 2, 2003
    Assignee: Bausch & Lomb Incorporated
    Inventors: Barry Eagan, Lloyd M. Caldwell, D. Robert Cady, Donald C. Grove, Gregg D. Niven, Xan Nguyen