Patents by Inventor Sachin Datar

Sachin Datar 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).

  • Patent number: 8026964
    Abstract: A method and apparatus for correcting defective pixel signals, wherein pixel signals are corrected in accordance with correction information associated with operating conditions under which an image is acquired. A method for acquiring and storing correction information in an imager device is also provided.
    Type: Grant
    Filed: July 8, 2008
    Date of Patent: September 27, 2011
    Assignee: Aptina Imaging Corporation
    Inventors: Nathan Walter, Sachin Datar
  • Publication number: 20100007777
    Abstract: A method and apparatus for correcting defective pixel signals, wherein pixel signals are corrected in accordance with correction information associated with operating conditions under which an image is acquired. A method for acquiring and storing correction information in an imager device is also provided.
    Type: Application
    Filed: July 8, 2008
    Publication date: January 14, 2010
    Inventors: Nathan Walter, Sachin Datar
  • Patent number: 7471820
    Abstract: A method and apparatus that allows for the identification and correction of defective pixels and/or pixel clusters in an imaging device. The method, and implementing apparatus determines that a pixel is defective based upon a comparison of its pixel signal value with the value of neighboring pixels. In one exemplary embodiment, a pixel is defective if it is beyond a pre-determined threshold of either a high or low value from its neighboring, corrected pixels. Pixels identified as defective can be corrected using exemplary methods of the invention such as substituting a value of the defective pixel with a value of one of its non-defective neighbors.
    Type: Grant
    Filed: August 24, 2005
    Date of Patent: December 30, 2008
    Assignee: Aptina Imaging Corporation
    Inventors: Clifford Yeung, Sachin Datar
  • Publication number: 20070291145
    Abstract: An image sensor includes an array of pixels on a semiconductor device for sensing light incident on the pixel array and a plurality of anomaly registers comprising a plurality of nonvolatile elements. Each anomaly register identifies an anomalous pixel cluster and includes a location indicator with a row and column address and a size indicator with a horizontal and vertical range. In other embodiments, each anomaly register includes a first address, second address, first direction flag, and second direction flag. The first and second direction flags use a first state to indicate a row address or a second state to indicate a column address. The first and second direction flags combine to define an anomalous pixel cluster, a pair of anomalous pixel rows, or a pair of anomalous pixel columns. Some embodiments may include an anomaly type indicator and some embodiments may include a shape indicator.
    Type: Application
    Filed: July 14, 2006
    Publication date: December 20, 2007
    Inventors: C. Patrick Doherty, Vinesh Sukumar, Shaheen Amanullah, Sachin Datar, Nathan Walter
  • Publication number: 20060044425
    Abstract: A method and apparatus that allows for the identification and correction of defective pixels and/or pixel clusters in an imaging device. The method, and implementing apparatus determines that a pixel is defective based upon a comparison of its pixel signal value with the value of neighboring pixels. In one exemplary embodiment, a pixel is defective if it is beyond a pre-determined threshold of either a high or low value from its neighboring, corrected pixels. Pixels identified as defective can be corrected using exemplary methods of the invention such as substituting a value of the defective pixel with a value of one of its non-defective neighbors.
    Type: Application
    Filed: August 24, 2005
    Publication date: March 2, 2006
    Inventors: Clifford Yeung, Sachin Datar