Patents by Inventor Sandhya Parameswaran

Sandhya Parameswaran 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).

  • System and method for unwrapping phase difference images
    Patent number: 6703835
    Abstract: A method for processing digital images includes acquiring a phase difference image which includes one or more phase wraps, creating a modulated phase difference image from the phase difference image, comparing the modulated phase difference image to the phase difference image to locate areas in the phase difference image to be unwrapped, and unwrapping the phase difference image based on the areas located in the comparing step. The unwrapping step is performed by replacing wrapped pixels in the phase difference image with pixels in the modulated phase difference image plus an integer multiple of &pgr;. The integer multiplier is computed by comparing overlapping pixels in the image segments. This has a smoothing effect causing the wrapped pixels in the phase difference image to become unwrapped. As a result of this pixel replacement process, an image of improved quality and information content is produced compared with conventional methods.
    Type: Grant
    Filed: April 11, 2002
    Date of Patent: March 9, 2004
    Assignee: GE Medical Systems Global Technology Co. LLC
    Inventors: Sarah K. Patch, Tejaswini Shubhachint, Graeme C. McKinnon, Sandhya Parameswaran, Joseph K. Maier
  • System and method for processing digital images
    Publication number: 20030193335
    Abstract: A method for processing digital images includes acquiring a phase difference image which includes one or more phase wraps, creating a modulated phase difference image from the phase difference image, comparing the modulated phase difference image to the phase difference image to locate areas in the phase difference image to be unwrapped, and unwrapping the phase difference image based on the areas located in the comparing step. The unwrapping step is performed by replacing wrapped pixels in the phase difference image with pixels in the modulated phase difference image plus an integer multiple of &pgr;. The integer multiplier is computed by comparing overlapping pixels in the image segments. This has a smoothing effect causing the wrapped pixels in the phase difference image to become unwrapped. As a result of this pixel replacement process, an image of improved quality and information content is produced compared with conventional methods.
    Type: Application
    Filed: April 11, 2002
    Publication date: October 16, 2003
    Inventors: Sarah K. Patch, Tejaswini Shubhachint, Graeme C. McKinnon, Sandhya Parameswaran, Joseph K. Maier