Patents by Inventor Petros Boufounos

Petros 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: 20240362457
    Abstract: A system for sensing a state of a device is provided. The system includes an autoencoder comprising an encoder, a latent subnetwork, and an extended decoder. The encoder encodes each input data point of input data from an input state space into a latent space to produce latent data points and propagates the latent data points with a neural Ordinary Differential Equation (ODE) to estimate an initial point of latent dynamics of the device in the latent space. The latent subnetwork propagates the initial point till a time index of interest using the neural ODE to produce a state of latent dynamics of the device at the time index of interest. The extended decoder decodes the state of latent dynamics of the device into an output state space different from the input state space to produce output data including the state of the device at the time index of interest.
    Type: Application
    Filed: April 27, 2023
    Publication date: October 31, 2024
    Inventors: Pu Wang, Cristian Vaca-Rubio, Toshiaki Koike Akino, Ye Wang, Petros Boufounos
  • Publication number: 20240337735
    Abstract: A distance estimation method comprises transmitting a wave of radiation modulated in frequency domain by an emitter to a scene, receiving a reflection of the transmitted wave from the scene, and interfering a copy of the transmitted wave with the received reflection to generate a sequence of samples of the beat signal with wrapped phases in a time domain. The method also comprises estimating a frequency of the beat signal in the time domain in an iterative manner until a termination condition is met. The iterative estimation of the frequency of the beat signal is based on phase unwrapping of the samples of the beat signal subject to correlated phase error derived from phase noise statistics of the emitter and a linear regression fitting the frequency of the beat signal into the unwrapped phases of the beat signal.
    Type: Application
    Filed: March 28, 2023
    Publication date: October 10, 2024
    Inventors: Joshua Rapp, Alfred Ulvog, Hassan Mansour, Toshiaki Koike-Akino, Petros Boufounos, Kieran Parsons
  • Publication number: 20240331127
    Abstract: A tomographic imaging system is provided. The system receives measurements at frequencies of a wave-field scattered by an internal structure of an object, recursively reconstructs an image of the internal structure of the object until a termination condition is met, and renders the reconstructed image. For a current iteration, a frequency is added to previous frequencies used during a previous iteration to produce current frequencies, such that the added frequency is higher than frequencies present in the previous frequencies, and reconstructs a current image of the internal structure of the object that minimizes a difference between the scattered wave-field measured at the current frequencies and a wave-field synthetized from the current image. The wave-field synthesized from the current image is generated by a neural network operator. A previous image determined during the previous iteration initializes the reconstruction of the current image.
    Type: Application
    Filed: March 29, 2023
    Publication date: October 3, 2024
    Inventors: Yanting Ma, Qingqing Zhao, Hassan Mansour, Petros Boufounos, Saleh Nabi
  • Patent number: 11948229
    Abstract: Embodiment of the present disclosure disclose a tomographic imaging system for reconstructing an image of an internal structure of an object. An incident wavefield is transmitted into the object occupying a background domain embedding the object. The incident wavefield is scattered into multiple scattered wavefield by the object. The incident and scattered wavefields are measured as a total wavefield. The total wavefield propagates through a computational domain and a residual domain in the background domain that are defined by cross-domain and residual measurement operators. The total wavefield is used for the image reconstruction. The image is reconstructed by solving an optimization problem corresponding to the computational domain. The optimization problem is solved iteratively to minimize a difference between the total wavefield and a wavefield synthesized using a measurement operator and a Green's function operator from the reconstructed image.
    Type: Grant
    Filed: February 17, 2022
    Date of Patent: April 2, 2024
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Hassan Mansour, Yanting Ma, Petros Boufounos
  • Publication number: 20240090768
    Abstract: An optical coherence tomography (OCT) system comprises an interferometer configured to split incident light into a reference beam and a test beam, and to interfere the test beam reflected from the specimen with the reference beam reflected from a reference mirror to produce an interference pattern. The OCT system also comprises a spectrometer configured to analyze spectral components of the interference pattern at non-uniformly sampled wavenumbers. A computer-readable memory of the OCT system is configured to store a measurement model with elements connecting different depth values with different non-uniformly sampled wavenumbers and weighted with weights derived from a power spectral density (PSD) of the incident light for corresponding wavenumbers. The OCT system further comprises a processor configured to determine the profilometry measurements of the specimen as a maximum likelihood estimate of the specimen surface depth by back-projection of the measured intensities with the measurement model.
    Type: Application
    Filed: September 14, 2022
    Publication date: March 21, 2024
    Inventors: Joshua Rapp, Hassan Mansour, Petros Boufounos, Philip Orlik, Toshiaki Koike Akino, Kieran Parsons
  • Publication number: 20240082936
    Abstract: Embodiments of the present disclosure provide a wire electric discharge machine (EDM) including a delivery system with one or combination of a wire electrode and a workpiece for delivering the wire electrode and the workpiece into proximity of each other and an energy source for creating electric discharge between the wire electrode and the workpiece. The wire EDM includes a wire electrode position measurement unit including light source to illuminate the wire electrode with encoded illumination pattern and a camera for acquiring a set of images of the wire electrode illuminated by the encoded illumination pattern. The wire EDM includes a processor to reconstruct positions of a segment of the wire electrode at a reconstruction rate greater than an acquisition rate of the camera by utilization of compressive sensing with sparse reconstruction technique and a controller to control the delivery system and the energy source based on the reconstructed positions.
    Type: Application
    Filed: September 7, 2022
    Publication date: March 14, 2024
    Inventors: Hassan Mansour, Petros Boufounos, Shigeru Takushima, Nobuyuki Ota
  • Publication number: 20240077601
    Abstract: The present disclosure provides a multiple-input multiple-output (MIMO) radar system and a method for detecting an object in a scene. The method comprises transmitting frequency modulated continuous wave (FMCW) in a radio frequency (RF) band, and collecting radar measurements of the scene sampled in a time-frequency domain within an intermediate frequency (IF) bandwidth. The method further comprises transforming the radar measurements into range-doppler space to produce measurements of different segments of the scene for different range-doppler bins formed by intersections of different range bins with different Doppler bins, classifying a presence of the hypothetical transmitter at different segments of the scene according to a signal model with an internal classification, combining the results of the classification to produce parameters of the object, and outputting the parameters of the object.
    Type: Application
    Filed: August 30, 2022
    Publication date: March 7, 2024
    Inventors: Pu Wang, Sian Jin, Petros Boufounos, Philip Orlik
  • Patent number: 11914023
    Abstract: A tracking system for tracking an expanded state of an object is provided. The tracking system comprises at least one processor and a memory having instructions stored thereon that, when executed by the at least one processor, cause the tracking system to execute a probabilistic filter that iteratively tracks a belief on the expanded state of the object, wherein the belief is predicted using a motion model of the object and is further updated using a compound measurement model of the object. The compound measurement model includes multiple probabilistic distributions constrained to lie on a contour of the object with a predetermined relative geometrical mapping to the center of the object. Further, the tracking system tracks the expanded state of the object based on the updated belief on the expanded state.
    Type: Grant
    Filed: May 5, 2021
    Date of Patent: February 27, 2024
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Pu Wang, Gang Yao, Hassan Mansour, Karl Berntorp, Petros Boufounos, Philip Orlik
  • Patent number: 11879964
    Abstract: A system and a method for tracking an expanded state of an object including a kinematic state indicative of a position of the object and an extended state indicative of one or combination of a dimension and an orientation of the object is provided herein. The system comprises at least one sensor configured to probe a scene including a moving object with one or multiple signal transmissions to produce one or multiple measurements of the object per the transmission, and a processor configured to execute a probabilistic filter tracking a joint probability of the expanded state of the object estimated by a motion model of the object and a measurement model of the object, wherein the measurement model includes a center-truncated distribution having predetermined truncation intervals. The system further comprises an output interface configured to output the expanded state of the object.
    Type: Grant
    Filed: July 27, 2020
    Date of Patent: January 23, 2024
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Pu Wang, Karl Berntorp, Yuxuan Xia, Hassan Mansour, Petros Boufounos, Philip Orlik
  • Patent number: 11842504
    Abstract: Systems and methods for image processing for determining a registration map between a first image of a scene with a second image of the scene, include solving an optimal transport (OT) problem to produce the registration map by optimizing a cost function that determines a minimum of a ground cost distance between the first and the second images modified with an epipolar geometry-based regularizer including a distance that quantifies the violation of an epipolar geometry constraint between corresponding points defined by the registration map. The ground cost compares a ground cost distance of features extracted within the first image with a ground cost distance of features extracted from the second image.
    Type: Grant
    Filed: August 13, 2021
    Date of Patent: December 12, 2023
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Yanting Ma, Dehong Liu, Petros Boufounos, Philip Orlik
  • Patent number: 11789142
    Abstract: A radar image processing device is provided for generating a radar image from a region of interest (ROI). The radar image processing device receives transmitted radar pulses and radar echoes reflected from the ROI at different positions along a path of a moving radar platform and stores computer-executable programs including a range compressor, a graph modeling generator, a signal aligner, a radar imaging generator and a focused image generator.
    Type: Grant
    Filed: June 11, 2020
    Date of Patent: October 17, 2023
    Assignee: MITSUBISHI ELECTRIC RESEARCH LABORATORIES INC.
    Inventors: Dehong Liu, Siheng Chen, Petros Boufounos
  • Publication number: 20230260170
    Abstract: Embodiment of the present disclosure disclose a tomographic imaging system for reconstructing an image of an internal structure of an object. An incident wavefield is transmitted into the object occupying a background domain embedding the object. The incident wavefield is scattered into multiple scattered wavefield by the object. The incident and scattered wavefields are measured as a total wavefield. The total wavefield propagates through a computational domain and a residual domain in the background domain that are defined by cross-domain and residual measurement operators. The total wavefield is used for the image reconstruction. The image is reconstructed by solving an optimization problem corresponding to the computational domain. The optimization problem is solved iteratively to minimize a difference between the total wavefield and a wavefield synthesized using a measurement operator and a Green's function operator from the reconstructed image.
    Type: Application
    Filed: February 17, 2022
    Publication date: August 17, 2023
    Applicant: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Hassan Mansour, Yanting Ma, Petros Boufounos
  • Publication number: 20230135987
    Abstract: A tracking system for tracking an expanded state of an object is provided. The tracking system executes, for a predetermined time period, a probabilistic filter that iteratively tracks a belief on the expanded state of the object, wherein the belief is predicted using a motion model of the object and is further updated using a compound measurement model of the object. After the predetermined time period, the updated beliefs are smoothed to generate a state-decoupled online batch of training data. The compound measurement model includes multiple probabilistic distributions constrained to lie around a contour of the object with a predetermined relative geometrical mapping to the center of the object. The compound measurement model is updated using the online batch of training data. Further, the tracking system tracks the expanded state of the object based on the updated compound measurement model.
    Type: Application
    Filed: October 28, 2021
    Publication date: May 4, 2023
    Applicant: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Pu Wang, Gang Yao, Karl Berntorp, Hassan Mansour, Petros Boufounos, Philip Orlik
  • Publication number: 20230129025
    Abstract: The present disclosure provides a system and a method for generating a radar image of a scene. The method comprises receiving radar measurements of a scene collected from a set of antennas, wherein the set of antennas are under uncertainties caused by one or a combination of position ambiguities and clock ambiguities of each of the antennas. The method further comprises generating the radar image of the scene by solving a sparse recovery problem. The sparse recovery problem determines, until a termination condition is met, a set of image shifts of the radar image corresponding to different uncertainties of the antennas and updates an estimate of the radar image, based on the determined set of image shifts of the radar image. The sparse recovery problem is solved with a neural network denoiser that denoises a filtering of the estimate of the radar image.
    Type: Application
    Filed: February 3, 2022
    Publication date: April 27, 2023
    Applicant: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Hassan Mansour, Suhas Lohit, Petros Boufounos
  • Patent number: 11635394
    Abstract: A permittivity sensor, for determining an image of a distribution of permittivity of a material of an object in a scene, comprising an input interface, a hardware processor, and an output interface is provided. The input interface is configured to accept phaseless measurements of propagation of a known incident field through the scene and scattered by the material of the object in the scene. The hardware processor is configured to solve a multi-variable minimization problem over unknown phases of the phaseless measurements and unknown image of the permittivity of the material of the object by minimizing a difference of a nonlinear function of the known incident field and the unknown image with a product of known magnitudes of the phaseless measurements and the unknown phases. Further, the output interface is configured to render the permittivity of the material of the object provided by the solution of the multi-variable minimization problem.
    Type: Grant
    Filed: February 10, 2020
    Date of Patent: April 25, 2023
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Yanting Ma, Muhammad Asad Lodhi, Hassan Mansour, Petros Boufounos, Dehong Liu
  • Patent number: 11619494
    Abstract: A system and a method for tracking an expanded state of an object including a kinematic state indicative of a position of the object and an extended state indicative of one or combination of a dimension and an orientation of the object is provided herein. The system comprises at least one sensor configured to probe a scene including a moving object with one or multiple signal transmissions to produce one or multiple measurements of the object per the transmission, and a processor configured to execute a probabilistic filter tracking a joint probability of the expanded state of the object estimated by a motion model of the object and a measurement model of the object, wherein the measurement model includes a center-truncated distribution having truncation intervals. The system further comprises an output interface configured to output the expanded state of the object.
    Type: Grant
    Filed: February 13, 2020
    Date of Patent: April 4, 2023
    Inventors: Pu Wang, Yuxuan Xia, Karl Berntorp, Toshiaki Koike-Akino, Hassan Mansour, Petros Boufounos, Philip Orlik
  • Publication number: 20230052582
    Abstract: Systems and methods for image processing for determining a registration map between a first image of a scene with a second image of the scene, include solving an optimal transport (OT) problem to produce the registration map by optimizing a cost function that determines a minimum of a ground cost distance between the first and the second images modified with an epipolar geometry-based regularizer including a distance that quantifies the violation of an epipolar geometry constraint between corresponding points defined by the registration map. The ground cost compares a ground cost distance of features extracted within the first image with a ground cost distance of features extracted from the second image.
    Type: Application
    Filed: August 13, 2021
    Publication date: February 16, 2023
    Applicant: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Yanting Ma, Dehong Liu, Petros Boufounos, Philip Orlik
  • Patent number: 11567183
    Abstract: A multiple input multiple output (MIMO) radar system for detecting a moving object is based on an explicit signal model. The explicit signal model accounts for waveform separation residuals by relating measurements of the virtual array to an auto-term including a Kronecker product of object-receiver signatures and transmitter-object signatures; and a cross-term including a Kronecker product of object-receiver signatures and transmitter-object residual signatures. The radar system uses a spatial MIMO object detector that is based on the explicit signal model to detect the moving object.
    Type: Grant
    Filed: April 8, 2020
    Date of Patent: January 31, 2023
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Pu Wang, Petros Boufounos, Hassan Mansour, Philip Orlik
  • Publication number: 20220373671
    Abstract: A tracking system for tracking an expanded state of an object is provided. The tracking system comprises at least one processor and a memory having instructions stored thereon that, when executed by the at least one processor, cause the tracking system to execute a probabilistic filter that iteratively tracks a belief on the expanded state of the object, wherein the belief is predicted using a motion model of the object and is further updated using a compound measurement model of the object. The compound measurement model includes multiple probabilistic distributions constrained to lie on a contour of the object with a predetermined relative geometrical mapping to the center of the object. Further, the tracking system tracks the expanded state of the object based on the updated belief on the expanded state.
    Type: Application
    Filed: May 5, 2021
    Publication date: November 24, 2022
    Applicant: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Pu Wang, Gang Yao, Hassan Mansour, Karl Berntorp, Petros Boufounos, Philip Orlik
  • Patent number: 11500086
    Abstract: An imaging system to reconstruct a reflectivity image of a scene including an object moving with the scene. A tracking system to track a deforming object to estimate an object deformation for each time step. Sensors acquire snapshots of the scene, each acquired snapshot of the object includes measurements in the object deformation for that time step, to produce a set of object measurements with deformed shapes over the time steps. Compute a correction to estimates of object deformation for each time step, with matching measurements of the corrected object deformation for each time step to measurements in the acquired snapshot of object for that time step. Select a corrected deformation over other corrected deformations for each time step, according to a distance between the corrected deformation and the estimate of the deformation, to obtain a final estimate of the deformation of the deformable object moving in the scene.
    Type: Grant
    Filed: September 28, 2020
    Date of Patent: November 15, 2022
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Shuchin Aeron, Yanting Ma, Petros Boufounos, Hassan Mansour