Patents by Inventor Nasser Kehtarnavaz

Nasser Kehtarnavaz 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: 20190320103
    Abstract: A method of recognizing movement includes measuring, by an inertial sensor, a first unit of inertia of an object. In addition, the method includes measuring a three dimensional shape of the object. Further, the method includes receiving, by a processor, a signal representative of the measured first unit of inertia from the inertial sensor and a signal representative of the measured shape from the depth sensor. Still further, the method includes determining a type of movement of the object based on the measured first unit of inertia and the measured shape utilizing a classification model.
    Type: Application
    Filed: June 26, 2019
    Publication date: October 17, 2019
    Inventors: Nasser KEHTARNAVAZ, Roozbeh JARARI, Kui LIU, Chen CHEN, Jian WU
  • Patent number: 10432842
    Abstract: A movement recognition system includes an inertial sensor, a depth sensor, and a processor. The inertial sensor is coupled to an object and configured to measure a first unit of inertia of the object. The depth sensor is configured to measure a three dimensional shape of the object using projected light patterns and a camera. The processor is configured to receive a signal representative of the measured first unit of inertia from the inertial sensor and a signal representative of the measured shape from the depth sensor and to determine a type of movement of the object based on the measured first unit of inertia and the measured shape utilizing a classification model.
    Type: Grant
    Filed: April 6, 2016
    Date of Patent: October 1, 2019
    Assignee: THE TEXAS A&M UNIVERSITY SYSTEM
    Inventors: Nasser Kehtarnavaz, Roozbeh Jafari, Kui Liu, Chen Chen, Jian Wu
  • Patent number: 9971874
    Abstract: A method including obtaining a first motion signal segment sensed by a motion sensor worn on a user's wrist or forearm; detecting the user performed a first action based on the first motion signal segment; obtaining a second motion signal segment sensed by the motion sensor, wherein the second motion signal segment was sensed by the motion sensor after the first motion signal segment; detecting the user performed a second action based on the second motion signal segment and in response to the detection of the first action; determining that a first medication was taken by the user based on the detection of the second action; and, in response to the determination that the first medication was taken by the user, causing presentation of an indication to the user or transmitting an indication to an external device that the first medication was taken by the user.
    Type: Grant
    Filed: August 24, 2015
    Date of Patent: May 15, 2018
    Inventors: Roozbeh Jafari, Nasser Kehtarnavaz, Chen Chen
  • Publication number: 20160292497
    Abstract: A movement recognition system includes an inertial sensor, a depth sensor, and a processor. The inertial sensor is coupled to an object and configured to measure a first unit of inertia of the object. The depth sensor is configured to measure a three dimensional shape of the object using projected light patterns and a camera. The processor is configured to receive a signal representative of the measured first unit of inertia from the inertial sensor and a signal representative of the measured shape from the depth sensor and to determine a type of movement of the object based on the measured first unit of inertia and the measured shape utilizing a classification model.
    Type: Application
    Filed: April 6, 2016
    Publication date: October 6, 2016
    Inventors: Nasser KEHTARNAVAZ, Roozbeh JARARI, Kui LIU, Chen CHEN, Jian WU
  • Patent number: 9364669
    Abstract: The claimed invention is directed to a real-time noise classification and tuning system for cochlear implant and other hearing device applications. The system is capable of automatically selecting the optimized parameters of a noise suppression algorithm in response to different noisy environments. The feature vector and the classifier deployed in the system to automatically identify the background noise environment are selected so that the computation burden is kept low to achieve a real-time throughput. The results reported herein indicate improvement in speech enhancement when using this intelligent real-time hearing device system.
    Type: Grant
    Filed: January 25, 2012
    Date of Patent: June 14, 2016
    Assignee: The Board of Regents of the University of Texas System
    Inventors: Nasser Kehtarnavaz, Vanishree Bijadi Gopalakrishna, Philipos C. Loizou
  • Publication number: 20160055316
    Abstract: A method including obtaining a first motion signal segment sensed by a motion sensor worn on a user's wrist or forearm; detecting the user performed a first action based on the first motion signal segment; obtaining a second motion signal segment sensed by the motion sensor, wherein the second motion signal segment was sensed by the motion sensor after the first motion signal segment; detecting the user performed a second action based on the second motion signal segment and in response to the detection of the first action; determining that a first medication was taken by the user based on the detection of the second action; and, in response to the determination that the first medication was taken by the user, causing presentation of an indication to the user or transmitting an indication to an external device that the first medication was taken by the user.
    Type: Application
    Filed: August 24, 2015
    Publication date: February 25, 2016
    Inventors: Roozbeh Jafari, Nasser Kehtarnavaz, Chen Chen
  • Patent number: 8743235
    Abstract: An apparatus and method for automatically adjusting an exposure for a digital imaging device by (a) receiving a current image frame using an exposure value (EV), (b) computing a current image spatial entropy (ISE) for the current image frame, and (c) whenever the current ISE is greater than a previous ISE, setting the previous ISE equal to the current ISE, increasing the EV, and repeating steps (a) and (b), and (d) whenever the current ISE is less than or equal to the previous ISE, decreasing the EV, receiving the current image frame using the EV, and displaying the current image frame.
    Type: Grant
    Filed: November 4, 2010
    Date of Patent: June 3, 2014
    Assignee: Board of Regents, The University of Texas System
    Inventors: Nasser Kehtarnavaz, Mohammad T. Rahman
  • Publication number: 20130022223
    Abstract: The claimed invention is directed to a real-time noise classification and tuning system for cochlear implant and other hearing device applications. The system is capable of automatically selecting the optimized parameters of a noise suppression algorithm in response to different noisy environments. The feature vector and the classifier deployed in the system to automatically identify the background noise environment are selected so that the computation burden is kept low to achieve a real-time throughput. The results reported herein indicate improvement in speech enhancement when using this intelligent real-time hearing device system.
    Type: Application
    Filed: January 25, 2012
    Publication date: January 24, 2013
    Applicant: The Board of Regents of the University of Texas System
    Inventors: Nasser Kehtarnavaz, Vanishree Bijadi Gopalakrishna, Philipos C. Loizou
  • Publication number: 20120212642
    Abstract: An apparatus and method for automatically adjusting an exposure for a digital imaging device by (a) receiving a current image frame using an exposure value (EV), (b) computing a current image spatial entropy (ISE) for the current image frame, and (c) whenever the current ISE is greater than a previous ISE, setting the previous ISE equal to the current ISE, increasing the EV, and repeating steps (a) and (b), and (d) whenever the current ISE is less than or equal to the previous ISE, decreasing the EV, receiving the current image frame using the EV, and displaying the current image frame.
    Type: Application
    Filed: November 4, 2010
    Publication date: August 23, 2012
    Applicant: BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM
    Inventors: Nasser Kehtarnavaz, Mohammad T. Rahman
  • Patent number: 8049811
    Abstract: An apparatus and method for automatically focusing a lens of a digital imaging device, such as a digital still or video camera or camera phone, that reduces the auto focus time while not compromising image sharpness quality and simultaneously reducing device power consumption due to focus actuator movement, all without tuning or adjustment of thresholds or parameters is disclosed. The present invention automatically computes a set of digital band-pass filters matched to the imaging device specifications along with corresponding step-size magnitudes. A filter-switching search for the in-focus focus actuator position is formulated such that filters are switched and step-sizes are reduced as the search gets closer to the in-focus position by utilizing local estimates of the first and second-order differential information of the focus value surface.
    Type: Grant
    Filed: May 5, 2009
    Date of Patent: November 1, 2011
    Assignee: Board of Regents, The University of Texas System
    Inventors: Mark N. Gamadia, Nasser Kehtarnavaz
  • Publication number: 20100188558
    Abstract: An apparatus and method for automatically focusing a lens of a digital imaging device, such as a digital still or video camera or camera phone, that reduces the auto focus time while not compromising image sharpness quality and simultaneously reducing device power consumption due to focus actuator movement, all without tuning or adjustment of thresholds or parameters is disclosed. The present invention automatically computes a set of digital band-pass filters matched to the imaging device specifications along with corresponding step-size magnitudes. A filter-switching search for the in-focus focus actuator position is formulated such that filters are switched and step-sizes are reduced as the search gets closer to the in-focus position by utilizing local estimates of the first and second-order differential information of the focus value surface.
    Type: Application
    Filed: May 5, 2009
    Publication date: July 29, 2010
    Applicant: BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM
    Inventors: Mark N. Gamadia, Nasser Kehtarnavaz
  • Patent number: 7576797
    Abstract: Automatic white balancing and/or autoexposure as useful in a digital camera extracts color channel gains from comparisons of image colors with reference colors under various color temperature illuminants and/or extracts exposure settings from illuminance mean, illuminance variance, illuminance minimum, and illuminance maximum in areas of an image with a trained neural network.
    Type: Grant
    Filed: June 25, 2002
    Date of Patent: August 18, 2009
    Assignee: Texas Instruments Incorporated
    Inventors: Nasser Kehtarnavaz, Hyuk-Joon Oh
  • Patent number: 7184080
    Abstract: Automatic white balancing and/or autoexposure as useful in a digital camera extracts color channel gains from comparisons of image colors with reference colors under various color temperature illuminants and/or extracts exposure settings from illuminance mean, illuminance variance, illuminance minimum, and illuminance maximum in areas of an image with a trained neural network.
    Type: Grant
    Filed: June 25, 2002
    Date of Patent: February 27, 2007
    Assignee: Texas Instruments Incorporated
    Inventors: Nasser Kehtarnavaz, Hyuk-Joon Oh
  • Publication number: 20030117507
    Abstract: Color filter array interpolation with directional derivatives using all eight nearest neighbor pixels. The interpolation method applies to Bayer pattern color CCDs and MOS detectors and is useful in digital still cameras and video cameras.
    Type: Application
    Filed: December 20, 2002
    Publication date: June 26, 2003
    Inventors: Nasser Kehtarnavaz, Hyuk-Joon Oh
  • Publication number: 20030052978
    Abstract: Automatic white balancing and/or autoexposure as useful in a digital camera extracts color channel gains from comparisons of image colors with reference colors under various color temperature illuminants and/or extracts exposure settings from illuminance mean, illuminance variance, illuminance minimum, and illuminance maximum in areas of an image with a trained neural network.
    Type: Application
    Filed: June 25, 2002
    Publication date: March 20, 2003
    Inventors: Nasser Kehtarnavaz, Hyuk-Joon Oh
  • Publication number: 20030020826
    Abstract: Automatic white balancing and/or autoexposure as useful in a digital camera extracts color channel gains from comparisons of image colors with reference colors under various color temperature illuminants and/or extracts exposure settings from illuminance mean, illuminance variance, illuminance minimum, and illuminance maximum in areas of an image with a trained neural network.
    Type: Application
    Filed: June 25, 2002
    Publication date: January 30, 2003
    Inventors: Nasser Kehtarnavaz, Hyuk-Joon Oh