Patents by Inventor Vikas Ramachandra

Vikas Ramachandra 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).

  • Publication number: 20130315354
    Abstract: A method operational on a receiver device for decoding a codeword is provided. At least a portion of a composite code mask is obtained, via a receiver sensor, and projected on the surface of a target object. The composite code mask may be defined by a code layer and a carrier layer. A code layer of uniquely identifiable spatially-coded codewords may be defined by a plurality of symbols. A carrier layer may be independently ascertainable and distinct from the code layer and may include a plurality of reference objects that are robust to distortion upon projection. At least one of the code layer and carrier layer may have been pre-shaped by a synthetic point spread function prior to projection. The code layer may be adjusted, at a processing circuit, for distortion based on the reference objects within the portion of the composite code mask.
    Type: Application
    Filed: March 5, 2013
    Publication date: November 28, 2013
    Applicant: QUALCOMM Incorporated
    Inventors: Kalin Mitkov Atanassov, James Wilson Nash, Vikas Ramachandra, Sergiu Radu Goma
  • Patent number: 8582654
    Abstract: Compressed frames of a video with associated reduced information about an object are received. The video has unreduced information about an object moving with respect to boundaries that are fixed with in each frame of the video and the compressed frames have reduced information about the object moving with respect to the boundaries that are fixed with in each of the compressed frames. The reduced information has quantization error due to compression. An estimate of the unreduced information is created by transforming the reduced information into the estimate using computer implemented motion estimation. The estimate has less quantization error than the reduced information.
    Type: Grant
    Filed: September 30, 2009
    Date of Patent: November 12, 2013
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Andrew J. Patti, Vikas Ramachandra
  • Publication number: 20130070055
    Abstract: Described herein are methods, systems and apparatus to improve imaging sensor production yields. In one method, a stereoscopic image sensor pair is provided from a manufacturing line. One or more images of a correction pattern are captured by the image sensor pair. Correction angles of the sensor pair are determined based on the images of the correction pattern. The correction angles of the sensor pair are represented graphically in a three dimensional space. Analysis of the graphical representation of the correction angles through statistical processing results in a set of production correction parameters that may be input into a manufacturing line to improve sensor pair yields.
    Type: Application
    Filed: September 18, 2012
    Publication date: March 21, 2013
    Inventors: Kalin Mitkov Atanassov, Sergiu R. Goma, Vikas Ramachandra, Milivoje Aleksic
  • Publication number: 20130063572
    Abstract: Described herein are methods and apparatus to adjust the convergence point of a stereoscopic image pair captured by an imaging device. In one method, a first image and a second image of a stereoscopic image pair are provided, and then shifting or cropping of the first image is performed to align the first and second image. This shifting or cropping is performed while preserving the second image. The method then includes determining a target horizontal image disparity based on a desired convergence point of the stereoscopic image pair and when the target horizontal disparity is greater than a predetermined maximum, the cropping of an outside dimension of the first image is limited. In some implementations it is limited to the predetermined maximum.
    Type: Application
    Filed: September 5, 2012
    Publication date: March 14, 2013
    Applicant: QUALCOMM INCORPORATED
    Inventors: Vikas Ramachandra, Kalin Mitkov Atanassov, Sergiu R. Goma
  • Publication number: 20130016186
    Abstract: Described are methods and apparatus for adjusting images of a stereoscopic image pair based on keypoint matches. The quality of the key point matches is first evaluated to determine whether the quality exceeds a keypoint quality threshold. If the quality level of the keypoint matches exceeds the threshold, the vertical disparity between the images of the stereoscopic image pair can be evaluated based on vertical disparity vectors between the keypoint matches. If the vertical disparity is below a threshold, no adjustment of the stereoscopic image pair may be performed. If the vertical disparity is above the threshold, an affine correction may compensate for pitch, roll, and scale differences between the images. A projective correction may compensate for yaw differences. The vertical disparity between the two images is then evaluated after the corrections to determine if additional adjustment should be performed.
    Type: Application
    Filed: June 7, 2012
    Publication date: January 17, 2013
    Applicant: QUALCOMM INCORPORATED
    Inventors: Kalin Mitkov Atanassov, Sergiu R. Goma, Vikas Ramachandra
  • Publication number: 20120300034
    Abstract: Present embodiments contemplate systems, apparatus, and methods to determine a user's preference for depicting a stereoscopic effect. Particularly, certain of the embodiments contemplate receiving user input while displaying a stereoscopic video sequence. The user's preferences may be determined based upon the input. These preferences may then be applied to future stereoscopic depictions.
    Type: Application
    Filed: August 25, 2011
    Publication date: November 29, 2012
    Applicant: QUALCOMM INCORPORATED
    Inventors: Kalin Atanassov, Sergiu R. Goma, Joseph Cheung, Vikas Ramachandra
  • Publication number: 20120033051
    Abstract: Present embodiments contemplate systems, apparatus, and methods to determine an appropriate focal depth for a sensor based upon a pair of stereoscopic images. Particularly, certain of the embodiments contemplate determining keypoints for each image, identifying correlations between the keypoints, and deriving object distances from the correlations. These distances may then be used to select a proper focal depth for one or more sensors.
    Type: Application
    Filed: August 8, 2011
    Publication date: February 9, 2012
    Applicant: QUALCOMM INCORPORATED
    Inventors: Kalin M. Atanassov, Sergiu R. Goma, Vikas Ramachandra