Patents by Inventor Pradeep Natarajan

Pradeep Natarajan 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: 9418316
    Abstract: A process for training and optimizing a system to select video frames for optical character recognition (OCR) based on feature metrics associated with blur and sharpness. A set of image frames are subjectively labelled based on a comparison of each frame before and after binarization to determine to what degree text is recognizable in the binary image. A plurality of different sharpness feature metrics are generated based on the original frame. A classifier is then trained using the feature metrics and the subjective labels. The feature metrics are then tested for accuracy and/or correlation with subjective labelling data. The set of feature metrics may be refined based on which metrics produce the best results.
    Type: Grant
    Filed: September 29, 2014
    Date of Patent: August 16, 2016
    Assignee: AMAZON TECHNOLOGIES, INC.
    Inventors: Yue Liu, Qingfeng Yu, Xing Liu, Pradeep Natarajan
  • Patent number: 9330332
    Abstract: An approach to computation of kernel descriptors is accelerated using precomputed tables. In one aspect, a fast algorithm for kernel descriptor computation that takes O(1) operations per pixel in each patch, based on pre-computed kernel values. This speeds up the kernel descriptor features under consideration, to levels that are comparable with D-SIFT and color SIFT, and two orders of magnitude faster than STIP and HoG3D. In some examples, kernel descriptors are applied to extract gradient, flow and texture based features for video analysis. In tests of the approach on a large database of internet videos used in the TRECVID MED 2011 evaluations, the flow based kernel descriptors are up to two orders of magnitude faster than STIP and HoG3D, and also produce significant performance improvements. Further, using features from multiple color planes produces small but consistent gains.
    Type: Grant
    Filed: October 4, 2013
    Date of Patent: May 3, 2016
    Assignee: Raytheon BBN Technologies Corp.
    Inventors: Pradeep Natarajan, Shuang Wu, Rohit Prasad, Premkumar Natarajan
  • Patent number: 9286541
    Abstract: A system that removes underlines in text appearing in captured images in multiple stages. The improved system rejects most text regions that do not require underline removal quickly and performs detailed underline detection and removal on a small number of regions.
    Type: Grant
    Filed: September 12, 2014
    Date of Patent: March 15, 2016
    Assignee: AMAZON TECHNOLOGIES, INC.
    Inventor: Pradeep Natarajan
  • Patent number: 9224061
    Abstract: A system estimates text orientation in images captured using a handheld camera prior detecting text in the image. Text orientation is estimated based on edges detected within the image, and the image is rotated based on the estimated orientation. Text detection and processing is then performed on the rotated image. Non-text features along a periphery of the image may be sampled to assure that clutter will not undermine the estimation of orientation.
    Type: Grant
    Filed: August 20, 2014
    Date of Patent: December 29, 2015
    Assignee: AMAZON TECHNOLOGIES, INC.
    Inventors: Pradeep Natarajan, Avnish Sikka, Rohit Prasad
  • Patent number: 9118587
    Abstract: Potential paths between a source and destination of a network are identified based on trace-route information, then filtered to eliminate paths or links that are not supported by ancillary information associated with the network so as to identify feasible/actual paths between the source and destination. The ancillary information includes, for example, routing tables and ARP tables. If a feasible path cannot be identified based on the ancillary information, supplemental information regarding nodes further along the potential path is assessed to provide a basis for inferring the nodes that may provide a feasible path. The determined feasible paths are displayed for review, and provided to serve as filters for subsequent path-analysis tools.
    Type: Grant
    Filed: April 1, 2014
    Date of Patent: August 25, 2015
    Assignee: RIVERBED TECHNOLOGY, INC.
    Inventors: Raghavendra Uppalli, James Mark Shaw, Pradeep Natarajan, Alain Cohen
  • Publication number: 20150117766
    Abstract: A method for feature transformation of a data set includes: receiving a data set including original feature samples with corresponding class labels; splitting the data set into a direction optimization set and a training set; using the direction optimization set to calculate an optimum transformation vector that maximizes inter-class separability and minimizes intra-class variance of the feature samples with respect to corresponding class labels; using the optimum transformation vector to transform the rest of the original feature samples of the data set to new feature samples with enhanced discriminative characteristics; and training a classifier using the new feature samples, wherein the method is performed by one or more processors.
    Type: Application
    Filed: August 13, 2014
    Publication date: April 30, 2015
    Inventors: Manasvi Tickoo, Devansh Arpit, Xiaodan Zhuang, Walter Andrews, Pradeep Natarajan
  • Patent number: 9014012
    Abstract: A network analysis system invokes an application specific, or source-destination specific, path discovery process. The application specific path discovery process determines the path(s) used by the application, collects performance data from the nodes along the path, and communicates this performance data to the network analysis system for subsequent performance analysis. The system may also maintain a database of prior network configurations to facilitate the identification of nodes that are off the path that may affect the current performance of the application. The system may also be specifically controlled so as to identify the path between any pair of specified nodes, and to optionally collect performance data associated with the path.
    Type: Grant
    Filed: October 7, 2010
    Date of Patent: April 21, 2015
    Assignee: Riverbed Technology, Inc.
    Inventors: Vinod Jeyachandran, Pradeep Natarajan, James Mark Shaw, Raghavendra Uppalli, Pradeep Singh, Nitin Gupta, Jerrold Stiffler
  • Patent number: 8953892
    Abstract: A computationally efficient approach to determining inner products between feature vectors is provided that eliminates or reduces the need for multiplication, and more specifically, provides an efficient and accurate basis selection for techniques such as Orthogonal Matching Pursuit.
    Type: Grant
    Filed: November 5, 2012
    Date of Patent: February 10, 2015
    Assignee: Raytheon BBN Technologies Corp.
    Inventors: Shiv N. Vitaladevuni, Pradeep Natarajan, Rohit Prasad, Premkumar Natarajan
  • Patent number: 8861872
    Abstract: Distributional information for a set of ? vectors is determined using a sparse basis selection approach to representing an input image or video. In some examples, this distributional information is used for a classification task.
    Type: Grant
    Filed: November 5, 2012
    Date of Patent: October 14, 2014
    Assignee: Raytheon BBN Technologies Corp.
    Inventors: Shiv N. Vitaladevuni, Pradeep Natarajan, Rohit Prasad, Premkumar Natarajan
  • Patent number: 8811193
    Abstract: A network analysis system invokes an application specific, or source-destination specific, path discovery process. The application specific path discovery process determines the path(s) used by the application, collects performance data from the nodes along the path, and communicates this performance data to the network analysis system for subsequent performance analysis. The system may also maintain a database of prior network configurations to facilitate the identification of nodes that are off the path that may affect the current performance of the application. The system may also be specifically controlled so as to identify the path between any pair of specified nodes, and to optionally collect performance data associated with the path.
    Type: Grant
    Filed: October 7, 2010
    Date of Patent: August 19, 2014
    Assignee: Riverbed Technology, Inc.
    Inventors: Vinod Jeyachandran, Pradeep Natarajan, James Mark Shaw, Raghavendra Uppalli, Pradeep Singh, Nitin Gupta, Jerrold Stiffler
  • Publication number: 20140211805
    Abstract: Potential paths between a source and destination of a network are identified based on trace-route information, then filtered to eliminate paths or links that are not supported by ancillary information associated with the network so as to identify feasible/actual paths between the source and destination. The ancillary information includes, for example, routing tables and ARP tables. If a feasible path cannot be identified based on the ancillary information, supplemental information regarding nodes further along the potential path is assessed to provide a basis for inferring the nodes that may provide a feasible path. The determined feasible paths are displayed for review, and provided to serve as filters for subsequent path-analysis tools.
    Type: Application
    Filed: April 1, 2014
    Publication date: July 31, 2014
    Applicant: Riverbed Technology, Inc.
    Inventors: Raghavendra Uppalli, James Mark Shaw, Pradeep Natarajan, Alain Cohen
  • Patent number: 8724494
    Abstract: Potential paths between a source and destination of a network are identified based on trace-route information, then filtered to eliminate paths or links that are not supported by ancillary information associated with the network so as to identify feasible/actual paths between the source and destination. The ancillary information includes, for example, routing tables and ARP tables. If a feasible path cannot be identified based on the ancillary information, supplemental information regarding nodes further along the potential path is assessed to provide a basis for inferring the nodes that may provide a feasible path. The determined feasible paths are displayed for review, and provided to serve as filters for subsequent path-analysis tools.
    Type: Grant
    Filed: August 15, 2011
    Date of Patent: May 13, 2014
    Assignee: Riverbed Technology, Inc.
    Inventors: Raghavendra Uppalli, James Mark Shaw, Pradeep Natarajan, Alain Cohen
  • Publication number: 20140126817
    Abstract: Distributional information for a set of ? vectors is determined using a sparse basis selection approach to representing an input image or video. In some examples, this distributional information is used for a classification task.
    Type: Application
    Filed: November 5, 2012
    Publication date: May 8, 2014
    Applicant: Raytheon BBN Technologies Corp.
    Inventors: Shiv N. Vitaladevuni, Pradeep Natarajan, Rohit Prasad, Premkumar Natarajan
  • Publication number: 20140126824
    Abstract: A computationally efficient approach to determining inner products between feature vectors is provided that eliminates or reduces the need for multiplication, and more specifically, provides an efficient and accurate basis selection for techniques such as Orthogonal Matching Pursuit.
    Type: Application
    Filed: November 5, 2012
    Publication date: May 8, 2014
    Applicant: Raytheon BBN Technologies Corp.
    Inventors: Shiv N. Vitaladevuni, Pradeep Natarajan, Rohit Prasad, Premkumar Natarajan
  • Publication number: 20140099033
    Abstract: An approach to computation of kernel descriptors is accelerated using precomputed tables. In one aspect, a fast algorithm for kernel descriptor computation that takes O(1) operations per pixel in each patch, based on pre-computed kernel values. This speeds up the kernel descriptor features under consideration, to levels that are comparable with D-SIFT and color SIFT, and two orders of magnitude faster than STIP and HoG3D. In some examples, kernel descriptors are applied to extract gradient, flow and texture based features for video analysis. In tests of the approach on a large database of internet videos used in the TRECVID MED 2011 evaluations, the flow based kernel descriptors are up to two orders of magnitude faster than STIP and HoG3D, and also produce significant performance improvements. Further, using features from multiple color planes produces small but consistent gains.
    Type: Application
    Filed: October 4, 2013
    Publication date: April 10, 2014
    Applicant: Raytheon BBN Technologies Corp.
    Inventors: Pradeep Natarajan, Shuang Wu, Rohit Prasad, Premkumar Natarajan
  • Publication number: 20120207161
    Abstract: Potential paths between a source and destination of a network are identified based on trace-route information, then filtered to eliminate paths or links that are not supported by ancillary information associated with the network so as to identify feasible/actual paths between the source and destination. The ancillary information includes, for example, routing tables and ARP tables. If a feasible path cannot be identified based on the ancillary information, supplemental information regarding nodes further along the potential path is assessed to provide a basis for inferring the nodes that may provide a feasible path. The determined feasible paths are displayed for review, and provided to serve as filters for subsequent path-analysis tools.
    Type: Application
    Filed: August 15, 2011
    Publication date: August 16, 2012
    Inventors: Raghavendra Uppalli, James Mark Shaw, Pradeep Natarajan, Alain Cohen
  • Publication number: 20110085450
    Abstract: A network analysis system invokes an application specific, or source-destination specific, path discovery process. The application specific path discovery process determines the path(s) used by the application, collects performance data from the nodes along the path, and communicates this performance data to the network analysis system for subsequent performance analysis. The system may also maintain a database of prior network configurations to facilitate the identification of nodes that are off the path that may affect the current performance of the application. The system may also be specifically controlled so as to identify the path between any pair of specified nodes, and to optionally collect performance data associated with the path.
    Type: Application
    Filed: October 7, 2010
    Publication date: April 14, 2011
    Inventors: Vinod JEYACHANDRAN, Pradeep Natarajan, James Mark Shaw, Raghavendra Uppalli, Pradeep Singh, Nitin Gupta, Jerrold Stiffler
  • Publication number: 20110085449
    Abstract: A network analysis system invokes an application specific, or source-destination specific, path discovery process. The application specific path discovery process determines the path(s) used by the application, collects performance data from the nodes along the path, and communicates this performance data to the network analysis system for subsequent performance analysis. The system may also maintain a database of prior network configurations to facilitate the identification of nodes that are off the path that may affect the current performance of the application. The system may also be specifically controlled so as to identify the path between any pair of specified nodes, and to optionally collect performance data associated with the path.
    Type: Application
    Filed: October 7, 2010
    Publication date: April 14, 2011
    Inventors: Vinod JEYACHANDRAN, Pradeep Natarajan, James Mark Shaw, Raghavendra Uppalti, Pradeep Singh, Nitin Gupta, Jerrold Stiffler
  • Publication number: 20100204103
    Abstract: The present invention provides peptides comprising at least one amphipathic alpha helix and having a cholesterol mediating activity and an ABCA stabilization activity. The invention further provides methods of using such peptides.
    Type: Application
    Filed: December 1, 2009
    Publication date: August 12, 2010
    Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: JOHN K. BIELICKI, PRADEEP NATARAJAN
  • Patent number: 7691965
    Abstract: The present invention provides peptides comprising at least one amphipathic alpha helix and having an cholesterol mediating activity and a ABCA stabilization activity. The invention further provides methods of using such peptides.
    Type: Grant
    Filed: December 15, 2004
    Date of Patent: April 6, 2010
    Assignee: The Regents of the University of California
    Inventors: John K. Bielicki, Pradeep Natarajan