Patents by Inventor Petros T. Boufounos

Petros T. Boufounos 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: 20200284900
    Abstract: A radar system for generating a radar image of a scene includes an input interface to accept radar measurements of a scene collected from a set of antennas with clock ambiguities, wherein the radar measurements are measurements of reflections of a radar pulse transmitted to the scene, a hardware processor configured to solve a convex sparse recovery problem to produce a radar image of the scene, wherein the convex sparse recovery problem matches a time shift of the radar measurements with a signal generated by propagation of the radar pulse through a radar propagation function of the scene, wherein the time shift of the radar measurements is represented as a convolution of the radar measurements with a shift kernel that is one-sparse in time, and an output interface configured to render the radar image.
    Type: Application
    Filed: March 7, 2019
    Publication date: September 10, 2020
    Applicant: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Hassan Mansour, Petros T. Boufounos, Muhammad Asad Lodhi
  • Patent number: 10768294
    Abstract: A radar imaging system to reconstruct a radar reflectivity image of a scene including an object moving with the scene, includes an optical sensor to track the object over a period of time including multiple time steps to produce, for each of the multiple time steps, a deformation of a nominal shape of the object, and an electromagnetic sensor to acquire snapshots of the scene over the multiple time steps to produce a set of radar reflectivity image of the object with deformed shapes defined by the corresponding deformations of the nominal shape of the object.
    Type: Grant
    Filed: March 19, 2018
    Date of Patent: September 8, 2020
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Petros T Boufounos, Hassan Mansour, Rakshith Sharma Srinivasa, Jeroen van Baar
  • Patent number: 10571408
    Abstract: A method propagates a pulse of wave through the material to receive a set of echoes resulted from scattering the pulse by different portions of the material and simulates a propagation of the pulse in the material using a neural network to determine a simulated set of echoes. Each node in a layer of the neural network corresponds to a portion of the material and assigned a value the permittivity of the portion of the material, such that the values of the nodes at locations of the portions form the image of the distribution of the permittivity of the material. The connection between two layers in the neural network models a scattering event. The method updates the values of the nodes by reducing an error between the received set of echoes and the simulated set of echoes to produce an image of the distribution of the permittivity of the material.
    Type: Grant
    Filed: March 10, 2016
    Date of Patent: February 25, 2020
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Ulugbek Kamilov, Dehong Liu, Hassan Mansour, Petros T. Boufounos
  • Patent number: 10488520
    Abstract: A time-of-flight (TOF) sensor includes a set of optical converters; each optical converter is configured to convert a reflection of the optical pulse from an object in the scene into an analog signal indicative of a time-of-flight of the optical pulse to the object. To that end, the set of optical converters produces a set of analog signals. The TOF sensor also includes at least one modulator to uniquely modulate each analog signal from the set of analog signals to produce a set of modulated signals, a mixer to mix the modulated signals to produce a mixed signal, and an analog to digital converter to sample the mixed signal to produce a set of data samples indicative of the TOF to the scene.
    Type: Grant
    Filed: October 11, 2016
    Date of Patent: November 26, 2019
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Petros T Boufounos, Achuta Kadambi
  • Publication number: 20190285740
    Abstract: A radar imaging system to reconstruct a radar reflectivity image of a scene including an object moving with the scene, includes an optical sensor to track the object over a period of time including multiple time steps to produce, for each of the multiple time steps, a deformation of a nominal shape of the object, and an electromagnetic sensor to acquire snapshots of the scene over the multiple time steps to produce a set of radar reflectivity image of the object with deformed shapes defined by the corresponding deformations of the nominal shape of the object.
    Type: Application
    Filed: March 19, 2018
    Publication date: September 19, 2019
    Inventors: Petros T. Boufounos, Hassan Mansour, Rakshith Sharma Srinivasa, Jeroen van Baar
  • Patent number: 10409888
    Abstract: Systems and methods for an imaging system including a first sensor to acquire a sequence of images of a first modality. A memory to store a first convolutional memory matrix. Wherein each element of the first convolutional memory matrix is a convolutional function of correspondingly located elements of coefficient matrices of convolutional representation of the images of the first modality, and to store a first dictionary matrix including atoms of the images of the first modality. A processor to transform a first image of a scene acquired by the first sensor as a convolution of the first dictionary matrix and a first coefficient matrix, to update the elements of the first convolutional memory matrix with the convolutional function of correspondingly located non-zero elements of the first coefficient matrix, and to update the dictionary matrix using the updated first convolutional memory matrix.
    Type: Grant
    Filed: June 29, 2017
    Date of Patent: September 10, 2019
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Ulugbek Kamilov, Kevin Degraux, Petros T Boufounos, Dehong Liu
  • Publication number: 20180349319
    Abstract: Systems and methods for an imaging system including a first sensor to acquire a sequence of images of a first modality. A memory to store a first convolutional memory matrix. Wherein each element of the first convolutional memory matrix is a convolutional function of correspondingly located elements of coefficient matrices of convolutional representation of the images of the first modality, and to store a first dictionary matrix including atoms of the images of the first modality. A processor to transform a first image of a scene acquired by the first sensor as a convolution of the first dictionary matrix and a first coefficient matrix, to update the elements of the first convolutional memory matrix with the convolutional function of correspondingly located non-zero elements of the first coefficient matrix, and to update the dictionary matrix using the updated first convolutional memory matrix.
    Type: Application
    Filed: June 29, 2017
    Publication date: December 6, 2018
    Applicant: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Ulugbek Kamilov, Kevin Degraux, Petros T. Boufounos, Dehong Liu
  • Patent number: 10148873
    Abstract: A method and system for fusing sensed measurements includes a depth sensor to acquire depth measurements of a scene as a sequence of frames, and a camera configured to acquire intensity measurements of the scene as a sequence of images, wherein a resolution of the depth sensor is less than a resolution of the camera. A processor searches for similar patches in multiple temporally adjacent frames of the depth measurements, groups the similar patches into blocks using the intensity measurements, increases a resolution of the blocks using prior constraints to obtain increased resolution blocks, and then constructs a depth image with a resolution greater than the resolution of sensor from the increased resolution blocks.
    Type: Grant
    Filed: December 22, 2015
    Date of Patent: December 4, 2018
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Ulugbek Kamilov, Petros T Boufounos
  • Patent number: 10145576
    Abstract: A method determines values of the airflow measured in the conditioned environment during the operation of the air-conditioning system and selects, from a set of regimes predetermined for the conditioned environment, a regime of the airflow matching the measured values of the airflow. The method selects, from a set of models of the airflow predetermined for the conditioned environment, a model of airflow corresponding to the selected regime and models the airflow using the selected model. The operation of the air-conditioning system is controlled using the modeled airflow.
    Type: Grant
    Filed: May 18, 2015
    Date of Patent: December 4, 2018
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Petros T. Boufounos, Piyush Grover, Boris Kramer, Mouhacine Benosman
  • Patent number: 10042046
    Abstract: A method and system for generating a high resolution two-dimensional (2D) radar image, by first transmitting a radar pulse by a transmit antenna at an area of interest and receiving echoes, corresponding to reflection the radar pulse in the area of interest, at a set of receive arrays, wherein each array includes and a set of receive antennas that are static and randomly distributed at different locations at a same side of the area of interest with a random orientation within a predetermined angular range. The the echoes are sampled for each receive array to produce distributed data for each array. Then, a compressive sensing (CS) procedure is applied to the distributed data to generate the high resolution 2D radar image.
    Type: Grant
    Filed: July 7, 2015
    Date of Patent: August 7, 2018
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Dehong Liu, Ulugbek Kamilov, Petros T Boufounos
  • Publication number: 20180100926
    Abstract: A time-of-flight (TOF) sensor includes a set of optical converters; each optical converter is configured to convert a reflection of the optical pulse from an object in the scene into an analog signal indicative of a time-of-flight of the optical pulse to the object. To that end, the set of optical converters produces a set of analog signals. The TOF sensor also includes at least one modulator to uniquely modulate each analog signal from the set of analog signals to produce a set of modulated signals, a mixer to mix the modulated signals to produce a mixed signal, and an analog to digital converter to sample the mixed signal to produce a set of data samples indicative of the TOF to the scene.
    Type: Application
    Filed: October 11, 2016
    Publication date: April 12, 2018
    Applicant: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Petros T. Boufounos, Achuta Kadambi
  • Patent number: 9897698
    Abstract: A system for determining a depth image representing distances to points of a scene includes a light source for generating and directing a set of light pulses toward the scene and a set of sensors for detecting and integrating light reflected from the scene. Each sensor is associated with a point in the scene and generates a signal indicative of an amount of light reflected from the point in the scene and reaching the sensor during a period of time. The system includes at least one processor for coordinating operations of the light source and the set of sensors and for determining the depth image having intensity values representing the distances to the points in the scene. The processor commands the light source to generate the set of light pulses including a first pulse with a first intensity profile having portions of identical lengths with different integrated intensities.
    Type: Grant
    Filed: February 23, 2015
    Date of Patent: February 20, 2018
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Petros T Boufounos, Achuta Kadambi
  • Patent number: 9864054
    Abstract: A method generates a 3D synthetic aperture radar (SAR) image of an area by first acquiring multiple data sets from the area using one or more SAR systems, wherein each SAR system has one or more parallel baselines and multiple pulse repetition frequency (PRF), wherein the PRF for each baseline is different. The data sets are registered and aligned to produce aligned data sets. Then, a 3D compressive sensing reconstruction procedure is applied to the aligned data sets to generate the 3D image corresponding to the area.
    Type: Grant
    Filed: March 10, 2014
    Date of Patent: January 9, 2018
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Dehong Liu, Petros T. Boufounos
  • Publication number: 20170261538
    Abstract: A method propagates a pulse of wave through the material to receive a set of echoes resulted from scattering the pulse by different portions of the material and simulates a propagation of the pulse in the material using a neural network to determine a simulated set of echoes. Each node in a layer of the neural network corresponds to a portion of the material and assigned a value the permittivity of the portion of the material, such that the values of the nodes at locations of the portions form the image of the distribution of the permittivity of the material. The connection between two layers in the neural network models a scattering event. The method updates the values of the nodes by reducing an error between the received set of echoes and the simulated set of echoes to produce an image of the distribution of the permittivity of the material.
    Type: Application
    Filed: March 10, 2016
    Publication date: September 14, 2017
    Applicant: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Ulugbek Kamilov, Dehong Liu, Hassan Mansour, Petros T. Boufounos
  • Publication number: 20170180639
    Abstract: A method and system for fusing sensed measurements includes a depth sensor to acquire depth measurements of a scene as a sequence of frames, and a camera configured to acquire intensity measurements of the scene as a sequence of images, wherein a resolution of the depth sensor is less than a resolution of the camera. A processor searches for similar patches in multiple temporally adjacent frames of the depth measurements, groups the similar patches into blocks using the intensity measurements, increases a resolution of the blocks using prior constraints to obtain increased resolution blocks, and then constructs a depth image with a resolution greater than the resolution of sensor from the increased resolution blocks.
    Type: Application
    Filed: December 22, 2015
    Publication date: June 22, 2017
    Inventors: Ulugbek Kamilov, Petros T. Boufounos
  • Patent number: 9661414
    Abstract: In an acoustic apparatus, an acoustic transducer is arranged in a substrate. Multiple acoustic pathways in the substrate have predetermined lengths, wherein a proximal end of each pathway forms an opening in a front surface of the substrate, and a distal end terminates at the acoustic transducer. The predetermined lengths of the acoustic pathways are designed to form an acoustic spatial filter that selectively passes acoustic signals from or to different locations. The transducer can convert electric energy to acoustic energy when the apparatus operates as a speaker, or the the transducer can convert acoustic energy to electric energy and operate as a microphone.
    Type: Grant
    Filed: June 10, 2015
    Date of Patent: May 23, 2017
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Jonathan Le Roux, John R Hershey, William S. Yerazunis, Petros T Boufounos, Laurent Daudet
  • Patent number: 9638801
    Abstract: In a system and method for reconstructing a scene, a light source transmits an optical pulse unto the scene, and a set of sensors receive a reflected pulse to acquire sensed signals corresponding to the optical pulse. There is a fixed coded aperture in an optical path between the light source and set of sensors. Then, a processor performs a method to reconstruct the scene as a three-dimensional (3D) depth map using a scene model.
    Type: Grant
    Filed: November 24, 2014
    Date of Patent: May 2, 2017
    Assignee: Mitsubishi Electric Research Laboratories, Inc
    Inventors: Petros T. Boufounos, Achuta Kadambi
  • Patent number: 9639761
    Abstract: A method extracts a low-rank descriptor of a video acquired of a scene by first extracting a set of descriptors for each image in the video. The sets of descriptors for the video are aggregated to form a descriptor matrix. Iteratively, a low-rank descriptor matrix is determined from the descriptor matrix, as well as a selection matrix that associates each column in the descriptor matrix to a corresponding column in the low-rank descriptor matrix. The low-rank descriptor matrix is output upon convergence.
    Type: Grant
    Filed: March 10, 2014
    Date of Patent: May 2, 2017
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Hassan Mansour, Shantanu Rane, Petros T. Boufounos, Anthony Vetro
  • Publication number: 20170010352
    Abstract: A method and system for generating a high resolution two-dimensional (2D) radar image, by first transmitting a radar pulse by a transmit antenna at an area of interest and receiving echoes, corresponding to reflection the radar pulse in the area of interest, at a set of receive arrays, wherein each array includes and a set of receive antennas that are static and randomly distributed at different locations at a same side of the area of interest with a random orientation within a predetermined angular range. The the echoes are sampled for each receive array to produce distributed data for each array. Then, a compressive sensing (CS) procedure is applied to the distributed data to generate the high resolution 2D radar image.
    Type: Application
    Filed: July 7, 2015
    Publication date: January 12, 2017
    Inventors: Dehong Liu, Ulugbek Kamilov, Petros T. Boufounos
  • Publication number: 20160366511
    Abstract: In an acoustic apparatus, an acoustic transducer is arranged in a substrate. Multiple acoustic pathways in the substrate have predetermined lengths, wherein a proximal end of each pathway forms an opening in a front surface of the substrate, and a distal end terminates at the acoustic transducer. The predetermined lengths of the acoustic pathways are designed to form an acoustic spatial filter that selectively passes acoustic signals from or to different locations. The transducer can convert electric energy to acoustic energy when the apparatus operates as a speaker, or the the transducer can convert acoustic energy to electric energy and operate as a microphone.
    Type: Application
    Filed: June 10, 2015
    Publication date: December 15, 2016
    Inventors: Jonathan Le Roux, John R. Hershey, William S. Yerazunis, Petros T. Boufounos, Laurent Daudet