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公开(公告)号:US20240230900A1
公开(公告)日:2024-07-11
申请号:US18090974
申请日:2022-12-29
Inventor: Michael J. DeWeert
CPC classification number: G01S17/18 , G01B11/162 , G01S17/89
Abstract: An interferometry system and method thereof detects movements of the surface of a body of water in response to acoustic waves generated from a sub-surface source interacting with the surface. Movements of the surface of the body of water are viewed over multiple interferometric images that can be pieced together to generate an interferometric movie or video. The interferometric movie or video depicts the movement of the acoustic wave propagating through the viewing area. Once the movement of the acoustic wave propagating through the viewing area is known, then back propagation techniques are employed to determine or triangulate the location of the sub-surface source that generated the acoustic wave.
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公开(公告)号:US11754692B2
公开(公告)日:2023-09-12
申请号:US16836000
申请日:2020-03-31
Inventor: Michael J. DeWeert
CPC classification number: G01S7/499 , G01S7/4808 , G01S17/08 , G01S17/89 , G02B6/0056 , G02B27/4261 , G02F1/13362
Abstract: The present disclosure provides a system and method for determining a range to an object in a fluid. The system includes a polarized light source directed to the object in the fluid, a first imaging sensor, a second imaging sensor, and at least one processor. The at least one processor characterizes a depolarization rate of the fluid and determines the range to the object. The method includes generating polarized light via a polarized light source, polarizing an imager relative to the polarized light, transmitting the polarized light from the polarized light source into the fluid, receiving reflected light from the object, characterizing a depolarization rate of the fluid, based, at least in part, on the reflected light, and determining the range to the object, based, at least in part, on the depolarization rate of the fluid.
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公开(公告)号:US11287244B1
公开(公告)日:2022-03-29
申请号:US16414871
申请日:2019-05-17
Inventor: Andrew N. Acker , Michael J. DeWeert
IPC: G01B11/16 , G01J9/02 , G01B9/02 , G01B9/02098
Abstract: A shearography a system and method for regularizing phase resolved shearograms with an arctan regularization function to produce regularized phase resolved shearogram outputs is provided. The system and method of the present disclosure optimizes the processing of phase resolved shearography allowing interference fringe analysis techniques to be applied to the regularized phase resolved shearogram output results of the processing.
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公开(公告)号:US10931899B1
公开(公告)日:2021-02-23
申请号:US16717010
申请日:2019-12-17
Inventor: Michael J. DeWeert
IPC: H04N5/357
Abstract: Systems and methods for computationally simulating and optimizing shearography systems are provided. The systems and methods for simulation and optimization avoid ray tracing, and, instead, implement a phase screen approach to image computation. The systems and methods include physics-based surface texture and surface motion simulations, the application of phase screens to computer-generated simulations of shearographic remote sensing, and the inclusion of de-polarization due to multiple scattering and birefringence at a surface being imaged. The systems and methods include further greatly optimize diffraction computations by treating an optical transfer function (OTF) of an arbitrary aperture as a sum of separable OTFs.
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公开(公告)号:US09818181B1
公开(公告)日:2017-11-14
申请号:US15217396
申请日:2016-07-22
Inventor: Andrew N. Acker , Michael L. Dichner , Michael J. DeWeert , Brian P. Farm , Tamara O'Toole , Clint Yoshimura
CPC classification number: G06T7/37 , G01B9/02087 , G01B9/02096 , G01V8/10 , G06T2207/10032 , G06T2207/20056 , G06T2207/30212
Abstract: A system and method are presented for generating shearograms from raw specklegram images which may, for example, be collected from airborne or other mobile shearography equipment. The system and method is used to detect and characterize buried mines, improvised explosive devices (IEDs), and underground tunnels, bunkers, and other structures. Amongst other purposes, the system and method may also be used for rapid scanning of ship hulls and aircraft for hidden structural defects, rapid pipeline inspection, and non-contact acoustic sensing for in-water and underground sources.
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公开(公告)号:US11719822B2
公开(公告)日:2023-08-08
申请号:US17366225
申请日:2021-07-02
Inventor: Michael J. DeWeert , Brian Chock , Jacob D. Garan , Reid A. Noguchi , Gary Sawai , Dugan C. Yoon
Abstract: An underwater imaging system is carried by a submersible platform to capture images that are processed into three-dimensional images stitched together to create a 3D dimensional video at video rate speeds that are transmitted to a control unit above the surface of the water. The imaging system utilizes a high speed image sensor or camera to capture sequential gated images that are synced via a gating module to two sequential laser beam pulses. The laser beam pulses illuminate an object in each gated image. When the object is within a gate overlap region, the two images may be processed using 3D imaging techniques to generate a 3D representation of the object in the overlap region of the two gates.
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公开(公告)号:US20210372779A1
公开(公告)日:2021-12-02
申请号:US16885739
申请日:2020-05-28
Inventor: Michael J. DeWeert , Eric M. Louchard , Reid A. Noguchi , Dugan C. Yoon
Abstract: Systems and methods for three-dimensional (3D) shape estimation of objects embedded in light-scattering media via polarimetry are provided. The systems and methods utilize polarization to exploit forward scattering in the light-scattering medium to mitigate backscatter interference (BSI).
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公开(公告)号:US20210302555A1
公开(公告)日:2021-09-30
申请号:US16836000
申请日:2020-03-31
Inventor: Michael J. DeWeert
Abstract: The present disclosure provides a system and method for determining a range to an object in a fluid. The system includes a polarized light source directed to the object in the fluid, a first imaging sensor, a second imaging sensor, and at least one processor. The at least one processor characterizes a depolarization rate of the fluid and determines the range to the object. The method includes generating polarized light via a polarized light source, polarizing an imager relative to the polarized light, transmitting the polarized light from the polarized light source into the fluid, receiving reflected light from the object, characterizing a depolarization rate of the fluid, based, at least in part, on the reflected light, and determining the range to the object, based, at least in part, on the depolarization rate of the fluid.
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公开(公告)号:US20210183017A1
公开(公告)日:2021-06-17
申请号:US16717107
申请日:2019-12-17
Inventor: Michael J. DeWeert
Abstract: Systems and methods for double-exposure image processing utilizing inversion techniques are provided. The systems and methods of the present disclosure recover single-exposure images from double-exposure images and strain images from double-exposure images.
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公开(公告)号:US20190228506A1
公开(公告)日:2019-07-25
申请号:US15875327
申请日:2018-01-19
Inventor: Michael J. DeWeert , Ian B. Murray
Abstract: Systems and methods related to pre-processing images and estimating PSFs for image deblurring in a noise-robust manner. The pre-processing may include iteratively denoising a reference image, iteratively denoising a scene image containing at least one straight edge within the scene image while preserving the at least one straight edge. The pre-processing may include smoothing, subtracting and dividing to provide a pre-processed image. The PSF-estimation process may include generating, with the at least one processor, a first noise value from portions of an edge intensity profile, generating a second noise value from a difference between the edge intensity profile and an integral of the noise-regularized inversion of the integration operator operating on the edge intensity profile and determining a value of a local curvature regularization parameter resulting in the first noise value and the second noise value being within a tolerance range.
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