Patents Assigned to Keystream Corporation
  • Automated content insertion into video scene
    Patent number: 8264544
    Abstract: A method for automated content insertion into a video sequence. The video sequence comprising a sequence of frames is received. An automated determination is made of non-moving pixels in the sequence of frames. Thereafter, an automated identification is made of valid regions comprising the non-moving pixels which are suitable for unobtrusive content insertion. Other embodiments, aspects and features are also disclosed.
    Type: Grant
    Filed: November 5, 2007
    Date of Patent: September 11, 2012
    Assignee: Keystream Corporation
    Inventors: Arthur George Chang, Schuyler A. Cullen, Edward R. Ratner
  • Automated method and apparatus for estimating motion of an image segment using motion vectors from overlapping macroblocks
    Patent number: 8085849
    Abstract: One embodiment relates to an automated method for estimating motion of an image segment. An image frame is segmented into irregularly-shaped image segments. Motion vectors of blocks of pixels in the image frame are estimated. A determination is made as to the blocks which overlap a segment, and candidate motion vectors are determined from the motion vectors for those overlapping blocks. A motion vector for the segment is selected from amongst the candidate motion vectors. Other embodiments, aspects, and features are also disclosed.
    Type: Grant
    Filed: October 30, 2007
    Date of Patent: December 27, 2011
    Assignee: Keystream Corporation
    Inventors: Edward R. Ratner, Schuyler A. Cullen
  • Computer-implemented method for object creation by partitioning of a temporal graph
    Patent number: 7920720
    Abstract: One embodiment relates to a computer-implemented method for the automated extraction of objects from a video stream. The method includes an automated procedure for creating a temporal graph, and an automated procedure for cutting the graph into graph partitions. The method further includes an automated procedure for mapping the graph partitions to pixels in frames of the video stream. Other features, aspects and embodiments are also disclosed.
    Type: Grant
    Filed: June 25, 2007
    Date of Patent: April 5, 2011
    Assignee: Keystream Corporation
    Inventors: Edward R. Ratner, Schuyler A. Cullen, Darius John Sadri
  • Computer-implemented method for efficient image segmentation using automated saddle-point detection
    Patent number: 7848571
    Abstract: One embodiment relates to a computer-implemented method of image segmentation using automated saddle point detection. An edge map is created by edge detection, and a distance map is generated based on the edge map. Saddle points are detected using the distance map. Connector pixels are determined using the saddle points, and connector pixels forming valid connecting paths are marked as edge pixels. Finally, flood filling is performed within edges to designate image segments. Other features, aspects and embodiments are also disclosed.
    Type: Grant
    Filed: June 25, 2007
    Date of Patent: December 7, 2010
    Assignee: Keystream Corporation
    Inventors: Edward R. Ratner, Schuyler A. Cullen