Patents by Inventor Lakshmi Dasari

Lakshmi Dasari 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).

  • Detection of highlighted regions
    Patent number: 5619592
    Abstract: A method and apparatus for detection of highlighted regions of a document. A document containing highlighted regions is scanned using a gray scale scanner. Morphology and threshold reduction techniques are used to separate highlighted and non-highlighted portions of the document. Having separated the highlighted and non-highlighted portions, optical character recognition (OCR) techniques can then be used to extract text from the highlighted regions.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: April 8, 1997
    Assignee: Xerox Corporation
    Inventors: Dan S. Bloomberg, Henry W. Sang, Jr., Lakshmi Dasari
  • Rapid detection of page orientation
    Patent number: 5276742
    Abstract: A method of apparatus for automatic page orientation of a scanned image which compares the number of character ascending pixels to the number of character descending pixels in the image to determine if the image is properly aligned or is 90.degree. or 180.degree. out of orientation. The method and apparatus includes morphologically processing the bitmap of the scanned image using structuring elements for isolating the character ascenders and descenders. When page orientation is improper, the bitmap image of the scanned image is rotated to correct the misalignment.
    Type: Grant
    Filed: November 19, 1991
    Date of Patent: January 4, 1994
    Assignee: Xerox Corporation
    Inventors: Lakshmi Dasari, Dan S. Bloomberg
  • Detection of highlighted regions
    Patent number: 5272764
    Abstract: A method and apparatus for detection of highlighted regions of a document. A document containing highlighted regions is scanned using a gray scale scanner. Morphology and threshold reduction techniques are used to separate highlighted and non-highlighted portions of the document. Having separated the highlighted and non-highlighted portions, optical character recognition (OCR) techniques can then be used to extract text from the highlighted regions.
    Type: Grant
    Filed: August 28, 1991
    Date of Patent: December 21, 1993
    Assignee: Xerox Corporation
    Inventors: Dan S. Bloomberg, Henry W. Sang, Jr., Lakshmi Dasari
  • Method and apparatus for image hand markup detection using morphological techniques
    Patent number: 5201011
    Abstract: An image markup detection device and method identifies and extracts markup lines and regions marked automatically or interactively by a user with an ordinary pen or pencil. Only morphological image processing operations on a scanned source image are used, resulting in the extrapolation of markup lines and marked region. The markup lines are either extracted from the image, or the background information of the image (e.g., text) is removed, leaving only the markup lines. The marked region can then be printed, transferred or otherwise processed.
    Type: Grant
    Filed: November 19, 1991
    Date of Patent: April 6, 1993
    Assignee: Xerox Corporation
    Inventors: Dan S. Bloomberg, Lakshmi Dasari
  • Detection of highlighted regions
    Patent number: 5048109
    Abstract: A method and apparatus for detection of highlighted regions of a document. A document containing highlighted regions is scanned using a gray scale scanner. Morphology and threshold reduction techniques are used to separate highlighted and non-highlighted portions of the docment. Having separated the highlighted and non-highlighted portions, optical character recognition (OCR) techniques can then be used to extract text from the highlighted regions.
    Type: Grant
    Filed: December 8, 1989
    Date of Patent: September 10, 1991
    Assignee: Xerox Corporation
    Inventors: Dan S. Bloomberg, Henry W. Sang, Jr., Lakshmi Dasari