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).

  • Patent number: 9519618
    Abstract: A pairwise distance computation transforms first and second signals using an absolute distance preserving mapping, such that a k-norm distance between the first mapped signal and the second mapped signal represents an absolute distance between the first signal and the second signal. The absolute distance preserving mapping maps an element of a first or a second signal to a vector having a size equal to a cardinality of the finite alphabet of the signals. The absolute distance preserving mapping determines a position N of the element in an ordered sequence of symbols of the finite alphabet and determines values for each of N elements of the vector as a fractional power 1/k of positive increments in the finite alphabet. The values for subsequent elements of the vector are determined as zero.
    Type: Grant
    Filed: June 3, 2014
    Date of Patent: December 13, 2016
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Petros T. Boufounos, Shantanu Rane
  • Patent number: 9501717
    Abstract: A method reconstructs and an uncompressed signal by first obtaining an encoded signal corresponding to the uncompressed signal, wherein the encoded signal includes universally quantized dithered linear measurements of the signal, and wherein each universally quantized dithered linear measurement is a quantized dithered linear measurement of the signal missing one or more significant bits. Side information about the signal is obtained, and the side information is used to obtain a prediction of the signal. The missing one or more significant bits are determined from the encoded signal using the prediction of the signal and the missing one or more significant bits are combined with the encoded signal to produce quantized dithered linear measurements of the signal. Then, the signal can be reconstructed as a reconstructed signal using the quantized dithered linear measurements.
    Type: Grant
    Filed: August 10, 2015
    Date of Patent: November 22, 2016
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Petros T Boufounos, Diego Valsesia
  • Publication number: 20160258645
    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: Application
    Filed: May 18, 2015
    Publication date: September 8, 2016
    Inventors: Petros T. Boufounos, Piyush Grover, Boris Kramer, Mouhacine Benosman
  • Publication number: 20160245920
    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: Application
    Filed: February 23, 2015
    Publication date: August 25, 2016
    Inventors: Petros T. Boufounos, Achuta Kadambi
  • Patent number: 9389305
    Abstract: Signals received by an array of sensing elements are processed by first positioning the sensing elements in a uniform grid of L locations, wherein each location to include or not to include a sensing element is selected during a design phase. The sensing elements are selected and grouped into subsets, wherein each subset contains one or more sensing elements, and each sensing element is a member of one or more subsets. The signals in each subset are linearly combined to produce a combined signal, which is then sampled to form an output channel, which can detect objects.
    Type: Grant
    Filed: February 27, 2013
    Date of Patent: July 12, 2016
    Assignee: MITSUBISHI ELECTRIC RESEARCH LABORATORIES, INC.
    Inventor: Petros T Boufounos
  • Publication number: 20160146595
    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: Application
    Filed: November 24, 2014
    Publication date: May 26, 2016
    Inventors: Petros T. Boufounos, Achuta Kadambi
  • Patent number: 9337815
    Abstract: A method for generating an embedding for a signal, which is invariant to an operator, by first measuring the signal with each vector from a set of measurement vectors to produce a corresponding set of coefficients, wherein the measuring compares and transforms each measurement vector and the signal using the operator. A set of one or more matching coefficients according to predefined criteria are selected. Then, the matching coefficients are combined to produce the embedding for the signal, wherein the embedding is operator invariant.
    Type: Grant
    Filed: March 10, 2015
    Date of Patent: May 10, 2016
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventor: Petros T Boufounos
  • Patent number: 9251436
    Abstract: Source signals emitted in a reverberant environment from different locations are processed by first receiving input signals corresponding to the source signals by a set of sensors. Then, a sparsity-based support estimation is applied to the input signals according to a reverberation model to produce estimates of the source signals and locations of a set of sources emitting the source signals.
    Type: Grant
    Filed: February 26, 2013
    Date of Patent: February 2, 2016
    Assignee: MITSUBISHI ELECTRIC RESEARCH LABORATORIES, INC.
    Inventors: Petros T Boufounos, Jonathan Le Roux, Kang Kang, John R Hershey
  • Patent number: 9244158
    Abstract: Reflectors in a scene are reconstructed using reflected signals. First, signals are transmitted to the scene, and the reflected signals are received by receivers are arranged in an array. The reflected signals are then processed to reconstruct the reflectors in the scene, wherein the processing enforces a model that a reflectivity of the scene in front and behind any reflector is equal to zero.
    Type: Grant
    Filed: February 27, 2012
    Date of Patent: January 26, 2016
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventor: Petros T. Boufounos
  • Patent number: 9239388
    Abstract: A scene is reconstructed by transmitting pulses into a scene from an array of transmitters so that only one pulse is transmitted by one transmitter at any one time. The one pulse is reflection by the scene and received as a set of signals. Each signal is sampled and decomposed to produce frequency coefficients stacked in a set of linear systems modeling a reflectivity of the scene. Then, a reconstruction method is applied to the set of linear systems. The reconstruction method solves each linear system separately to obtain corresponding solutions, which are shared and combined to reconstruct the scene.
    Type: Grant
    Filed: February 28, 2013
    Date of Patent: January 19, 2016
    Assignee: MITSUBISHI ELECTRIC RESEARCH LABORATORIES, INC.
    Inventor: Petros T Boufounos
  • Patent number: 9218646
    Abstract: A method plans paths of a set of mobile sensors with changeable positions and orientations in an environment. Each sensor includes a processor, an imaging system and a communication system. A desired resolution of coverage of the environment is defined, and an achieved resolution of the coverage is initialized. For each time instant and each sensor, an image of the environment is acquired using the imaging system. The achieved resolution is updated according to the image. The sensor is moved to a next position and orientation based on the achieved resolution and the desired resolution. Then, local information of the sensor is distributed to other sensors using the communication system to optimize a coverage of the environment.
    Type: Grant
    Filed: June 3, 2014
    Date of Patent: December 22, 2015
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Petros T. Boufounos, Richard Vaccaro, Mouhacine Benosman
  • Publication number: 20150348235
    Abstract: A method plans paths of a set of mobile sensors with changeable positions and orientations in an environment. Each sensor includes a processor, an imaging system and a communication system. A desired resolution of coverage of the environment is defined, and an achieved resolution of the coverage is initialized. For each time instant and each sensor, an image of the environment is acquired using the imaging system. The achieved resolution is updated according to the image. The sensor is moved to a next position and orientation based on the achieved resolution and the desired resolution. Then, local information of the sensor is distributed to other sensors using the communication system to optimize a coverage of the environment.
    Type: Application
    Filed: June 3, 2014
    Publication date: December 3, 2015
    Applicant: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Petros T. Boufounos, Richard Vaccaro, Mouhacine Benosman
  • Publication number: 20150349949
    Abstract: A pairwise distance computation transforms first and second signals using an absolute distance preserving mapping, such that a k-norm distance between the first mapped signal and the second mapped signal represents an absolute distance between the first signal and the second signal. The absolute distance preserving mapping maps an element of a first or a second signal to a vector having a size equal to a cardinality of the finite alphabet of the signals. The absolute distance preserving mapping determines a position N of the element in an ordered sequence of symbols of the finite alphabet and determines values for each of N elements of the vector as a fractional power 1/k of positive increments in the finite alphabet. The values for subsequent elements of the vector are determined as zero.
    Type: Application
    Filed: June 3, 2014
    Publication date: December 3, 2015
    Applicant: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Petros T. Boufounos, Shantanu Rane
  • Patent number: 9182483
    Abstract: A synthetic aperture radar image is generated by directing randomly a beam of transmitted pulses at an area using a steerable array of antennas, wherein the area is uniformly by the transmitted pulses while the array of antennas moves along a path. A sparse reconstruction procedure is applied to received signals from the area due to reflecting the transmitted pulses to generate the image corresponding to the area. The radar system can operate in either sliding spotlight mode, or scan mode. The area can be of an arbitrary shape, and a resolution of the image can be increased.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: November 10, 2015
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Dehong Liu, Petros T Boufounos
  • Publication number: 20150253423
    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: Application
    Filed: March 10, 2014
    Publication date: September 10, 2015
    Applicant: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Dehong Liu, Petros T. Boufounos
  • Publication number: 20150254513
    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: Application
    Filed: March 10, 2014
    Publication date: September 10, 2015
    Applicant: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Hassan Mansour, Shantanu Rane, Petros T. Boufounos, Anthony Vetro
  • Patent number: 8891878
    Abstract: Scale-invariant features are extracted from an image. The features are projected to a lower dimensional random projection matrix by multiplying the features by a matrix of random entries. The matrix of random projections is quantized to produce a matrix of quantization indices, which form a query vector for searching a database of images to retrieve metadata related to the image.
    Type: Grant
    Filed: June 15, 2012
    Date of Patent: November 18, 2014
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Shantanu Rane, Petros T Boufounos, Mu Li
  • Publication number: 20140266869
    Abstract: A synthetic aperture radar image is generated by directing randomly a beam of transmitted pulses at an area using a steerable array of antennas, wherein the area is uniformly by the transmitted pulses while the array of antennas moves along a path. A sparse reconstruction procedure is applied to received signals from the area due to reflecting the transmitted pulses to generate the image corresponding to the area. The radar system can operate in either sliding spotlight mode, or scan mode. The area can be of an arbitrary shape, and a resolution of the image can be increased.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: MITSUBISHI ELECTRIC RESEARCH LABORATORIES, INC.
    Inventors: Dehong Liu, Petros T Boufounos
  • Patent number: 8837727
    Abstract: A hash of signal is determining by dithering and scaling random projections of the signal. Then, the dithered and scaled random projections are quantized using a non-monotonic scalar quantizer to form the hash, and a privacy of the signal is preserved as long as parameters of the scaling, dithering and projections are only known by the determining and quantizing steps.
    Type: Grant
    Filed: November 8, 2011
    Date of Patent: September 16, 2014
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Petros T. Boufounos, Shantanu Rane
  • Publication number: 20140257727
    Abstract: One or more signal are embedded by producing complex-valued measurements of the signal by measuring the signal using a complex measurement matrix. Then, only a phase of the complex-valued measurements are retinas, such that angles of the signal are preserved. Subsequently, the phases, which can be quantized and stored in a database, can be searched to locate similar signals based only on their phase angles.
    Type: Application
    Filed: March 11, 2013
    Publication date: September 11, 2014
    Applicant: MITSUBISHI ELECTRIC RESEARCH LABORATORIES, INC.
    Inventor: Petros T. Boufounos