Patents by Inventor Qinfen Zheng

Qinfen Zheng 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: 8913781
    Abstract: Systems and methods for audience monitoring are provided that include receiving an input including a recording or live feed of an audience composed of several persons, detecting foreground of the input, performing blob segmentation of the input, and analyzing human presence on each segmented blob by identifying at least one person, identifying a spatial distribution of at least one identified person, determining a dwell time of at least one identified person, determining a temporal distribution of at least one identified person, and determining a gaze direction of at least one identified person. Such detecting provides the ability to track individual persons present in the audience, and how long they remain in the audience. The method also provides the ability to determine gaze direction of persons in the audience, and how long one or more persons are gazing in a particular direction.
    Type: Grant
    Filed: May 12, 2009
    Date of Patent: December 16, 2014
    Assignee: SET Corporation
    Inventors: Tom Strat, Qinfen Zheng
  • Patent number: 8457356
    Abstract: Methods and systems are provided to determine a target tracking box that surrounds a moving target. The pixels that define an image within the target tracking box can be classified as background pixels, foreground pixels, and changing pixels which may include pixels of an articulation, such as a portion of the target that moves relatively to the target tracking box. Identification of background image pixels improves the signal-to-noise ratio of the image, which is defined as the ratio between the number of pixels belonging to the foreground to the number of changing pixels, and which is used to track the moving target. Accordingly, tracking of small and multiple moving targets becomes possible because of the increased signal-to-noise ratio.
    Type: Grant
    Filed: October 21, 2011
    Date of Patent: June 4, 2013
    Assignee: SET Corporation
    Inventor: Qinfen Zheng
  • Patent number: 8179440
    Abstract: Method and system for objects surveillance and real-time activity recognition is based on analysis of spatio-temporal images of individuals under surveillance where a spatio-temporal volume occupied by each individual is decomposed by crossing the same at specific heights to form 2-dimensional slices, each containing representation of trajectory of the motion of corresponding portions of the individual body. The symmetry of the trajectories (Gait DNA) is analyzed and classified to generate data indicative of a type of activity of the individual based on the symmetry or asymmetry of the Gait DNA in each 2-dimensional slice. An effective occlusion handling ability is implemented which permits to restore the occluded silhouette of an individual.
    Type: Grant
    Filed: December 5, 2006
    Date of Patent: May 15, 2012
    Assignee: University of Maryland
    Inventors: Yang Ran, Ramalingam Chellappa, Qinfen Zheng
  • Publication number: 20120099765
    Abstract: Methods and systems are provided to determine a target tracking box that surrounds a moving target. The pixels that define an image within the target tracking box can be classified as background pixels, foreground pixels, and changing pixels which may include pixels of an articulation, such as a portion of the target that moves relatively to the target tracking box. Identification of background image pixels improves the signal-to-noise ratio of the image, which is defined as the ratio between the number of pixels belonging to the foreground to the number of changing pixels, and which is used to track the moving target. Accordingly, tracking of small and multiple moving targets becomes possible because of the increased signal-to-noise ratio.
    Type: Application
    Filed: October 21, 2011
    Publication date: April 26, 2012
    Applicant: SET CORPORATION
    Inventor: Qinfen ZHENG
  • Publication number: 20100046797
    Abstract: Systems and methods for audience monitoring are provided that include receiving an input including a recording or live feed of an audience composed of several persons, detecting foreground of the input, performing blob segmentation of the input, and analyzing human presence on each segmented blob by identifying at least one person, identifying a spatial distribution of at least one identified person, determining a dwell time of at least one identified person, determining a temporal distribution of at least one identified person, and determining a gaze direction of at least one identified person. Such detecting provides the ability to track individual persons present in the audience, and how long they remain in the audience. The method also provides the ability to determine gaze direction of persons in the audience, and how long one or more persons are gazing in a particular direction.
    Type: Application
    Filed: May 12, 2009
    Publication date: February 25, 2010
    Applicant: SET Corporation
    Inventors: Tom STRAT, Qinfen Zheng
  • Publication number: 20100033574
    Abstract: Method and system for objects surveillance and real-time activity recognition is based on analysis of spatio-temporal images of individuals under surveillance where a spatio-temporal volume occupied by each individual is decomposed by crossing the same at specific heights to form 2-dimensional slices, each containing representation of trajectory of the motion of corresponding portions of the individual body. The symmetry of the trajectories (Gait DNA) is analyzed and classified to generate data indicative of a type of activity of the individual based on the symmetry or asymmetry of the Gait DNA in each 2-dimensional slice. An effective occlusion handling ability is implemented which permits to restore the occluded silhouette of an individual.
    Type: Application
    Filed: December 5, 2006
    Publication date: February 11, 2010
    Inventors: Yang Ran, Ramalingam Chellappa, Qinfen Zheng
  • Publication number: 20020176604
    Abstract: A method determines driver glance information from an input video by performing motion analysis on the video; and performing image analysis on a frame of the video.
    Type: Application
    Filed: April 16, 2001
    Publication date: November 28, 2002
    Inventors: Chandra Shekhar, Philippe Burlina, Qinfen Zheng, Rama Chellappa