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11. 发明授权

US10834372B2 3DTV at home: Eulerian-Lagrangian stereo-to-multi-view conversion 有权
公开(公告)号：US10834372B2
公开(公告)日：2020-11-10
申请号：US16000662
申请日：2018-06-05
申请人： Massachusetts Institute of Technology
发明人： Wojciech Matusik , Piotr K. Didyk , William T. Freeman , Petr Kellnhofer , Pitchaya Sitthi-Amorn , Frederic Durand , Szu-Po Wang
IPC分类号： H04N13/111 , G06T7/593 , H04N13/128
摘要： A method and system of converting stereo video content to multi-view video content combines an Eulerian approach with a Lagrangian approach. The method comprises generating a disparity map for each of the left and right views of a received stereoscopic frame. For each corresponding pair of left and right scanlines of the received stereoscopic frame, the method further comprises decomposing the left and right scanlines into a left sum of wavelets or other basis functions, and a right sum wavelets or other basis functions. The method further comprises establishing an initial disparity correspondence between left wavelets and right wavelets based on the generated disparity maps, and refining the initial disparity between the left wavelet and the right wavelet using a phase difference between the corresponding wavelets. The method further comprises reconstructing at least one novel view based on the left and right wavelets.

12. 发明授权

US10380745B2 Methods and devices for measuring object motion using camera images 有权
公开(公告)号：US10380745B2
公开(公告)日：2019-08-13
申请号：US15445499
申请日：2017-02-28
申请人： Massachusetts Institute of Technology
发明人： Oral Buyukozturk , William T. Freeman , Frederic Durand , Myers Abraham Davis , Neal Wadhwa , Justin G. Chen
IPC分类号： G06T7/20 , G06T7/277 , G06T7/262
摘要： A method and corresponding apparatus for measuring object motion using camera images may include measuring a global optical flow field of a scene. The scene may include target and reference objects captured in an image sequence. Motion of a camera used to capture the image sequence may be determined relative to the scene by measuring an apparent, sub-pixel motion of the reference object with respect to an imaging plane of the camera. Motion of the target object corrected for the camera motion may be calculated based on the optical flow field of the scene and on the apparent, sub-pixel motion of the reference object with respect to the imaging plane of the camera. Embodiments may enable measuring vibration of structures and objects from long distance in relatively uncontrolled settings, with or without accelerometers, with high signal-to-noise ratios.

13. 发明申请

US20180352208A1 3dtv At Home: Eulerian-Lagrangian Stereo-To-Multi-View Conversion 审中-公开
公开(公告)号：US20180352208A1
公开(公告)日：2018-12-06
申请号：US16000662
申请日：2018-06-05
申请人： Massachusetts Institute of Technology
发明人： Wojciech Matusik , Piotr K. Didyk, Ph.D. , William T. Freeman , Petr Kellnhofer , Pitchaya Sitthi-Amorn , Frederic Durand , Szu-Po Wang
IPC分类号： H04N13/111 , G06T7/593 , H04N13/128
摘要： A method and system of converting stereo video content to multi-view video content combines an Eulerian approach with a Lagrangian approach. The method comprises generating a disparity map for each of the left and right views of a received stereoscopic frame. For each corresponding pair of left and right scanlines of the received stereoscopic frame, the method further comprises decomposing the left and right scanlines into a left sum of wavelets or other basis functions, and a right sum wavelets or other basis functions. The method further comprises establishing an initial disparity correspondence between left wavelets and right wavelets based on the generated disparity maps, and refining the initial disparity between the left wavelet and the right wavelet using a phase difference between the corresponding wavelets. The method further comprises reconstructing at least one novel view based on the left and right wavelets.

14. 发明授权

US10037609B2 Video-based identification of operational mode shapes 有权
公开(公告)号：US10037609B2
公开(公告)日：2018-07-31
申请号：US15012835
申请日：2016-02-01
申请人： Massachusetts Institute of Technology
发明人： Justin Gejune Chen , Oral Buyukozturk , William T. Freeman , Frederic Pierre Durand , Myers Abraham Davis , Neal Wadhwa
IPC分类号： G06T7/246
CPC分类号： G06T7/246 , G06T2207/10016
摘要： A method and corresponding device for identifying operational mode shapes of an object in a video stream includes extracting pixel-wise Eulerian motion signals of an object from an undercomplete representation of frames within a video stream. Pixel-wise Eulerian motion signals are downselected to produce a representative set of Eulerian motion signals of the object. Operational mode shapes of the object are identified based on the representative set. Resonant frequencies can also be identified. Embodiments enable vibrational characteristics of objects to be determined using video in near real time.

15. 发明授权

US10007986B2 Linear-based eulerian motion modulation 有权
公开(公告)号：US10007986B2
公开(公告)日：2018-06-26
申请号：US15721375
申请日：2017-09-29
申请人： Massachusetts Institute of Technology
发明人： Hao-yu Wu , Michael Rubinstein , Eugene Inghaw Shih , John V. Guttag , Frederic Durand , William T. Freeman , Neal Wadhwa
IPC分类号： G06K9/00 , G06T7/00 , G06T7/254 , G06T7/262
CPC分类号： G06T7/0012 , G06T7/0016 , G06T7/254 , G06T7/262 , G06T2207/20016 , G06T2207/30076 , G06T2207/30088 , G06T2207/30104 , G06T2207/30201
摘要： In an embodiment, a method converts two images to a transform representation in a transform domain. For each spatial position, the method examines coefficients representing a neighborhood of the spatial position that is spatially the same across each of the two images. The method calculates a first vector in the transform domain based on first coefficients representing the spatial position, the first vector representing change from a first to second image of the two images describing deformation. The method modifies the first vector to create a second vector in the transform domain representing amplified movement at the spatial position between the first and second images. The method calculates second coefficients based on the second vector of the transform domain. From the second coefficients, the method generates an output image showing motion amplified according to the second vector for each spatial position between the first and second images.

16. 发明授权

US09756316B2 Joint view expansion and filtering for automultiscopic 3D displays 有权
公开(公告)号：US09756316B2
公开(公告)日：2017-09-05
申请号：US14531548
申请日：2014-11-03
申请人： Massachusetts Institute of Technology
发明人： Piotr Krzysztof Didyk , Pitchaya Sitthi-Amorn , Wojciech Matusik , Frederic Durand , William T. Freeman
IPC分类号： H04N13/04 , H04N13/00
CPC分类号： H04N13/302 , H04N13/111 , H04N13/122 , H04N13/128 , H04N13/351
摘要： Multi-view autostereoscopic displays provide an immersive, glasses-free 3D viewing experience, but they preferably use correctly filtered content from multiple viewpoints. The filtered content, however, may not be easily obtained with current stereoscopic production pipelines. The proposed method and system takes a stereoscopic video as an input and converts it to multi-view and filtered video streams that may be used to drive multi-view autostereoscopic displays. The method combines a phase-based video magnification and an interperspective antialiasing into a single filtering process. The whole algorithm is simple and may be efficiently implemented on current GPUs to yield real-time performance. Furthermore, the ability to retarget disparity is naturally supported. The method is robust and works transparent materials, and specularities. The method provides superior results when compared to the state-of-the-art depth-based rendering methods. The method is showcased in the context of a real-time 3D videoconferencing system.

17. 发明申请

US20150319540A1 Method and Apparatus for Recovering Audio Signals from Images 审中-公开
标题翻译：从图像中恢复音频信号的方法和装置
公开(公告)号：US20150319540A1
公开(公告)日：2015-11-05
申请号：US14337091
申请日：2014-07-21
申请人： Massachusetts Institute of Technology
发明人： Michael Rubinstein , Myers Abraham Davis , Frederic Durand , William T. Freeman , Neal Wadhwa
IPC分类号： H04R23/00
CPC分类号： H04R23/008 , G01H9/00 , G01H9/002 , H04R3/00
摘要： A method of recovering audio signals and corresponding apparatus according to an embodiment of the present invention using video or other sequence of images enables recovery of sound that causes vibrations of a surface. An embodiment method includes combining representations of local motions of a surface to produce a global motion signal of the surface. The local motions are captured in a series of images of features of the surface, and the global motion signal represents a sound within an environment in which the surface is located. Some embodiments compare representations of local motions of a surface to determine which motions are in-phase or out-of-phase with each other, enabling visualization of surface vibrational modes. Embodiments are passive, as compared to other forms of remote audio recovery that employ active sensing, such as laser microphone systems. Example applications for the embodiments include espionage and surveillance.
摘要翻译：根据本发明的实施例，使用视频或其他图像序列恢复音频信号的方法和相应的装置能够恢复引起表面振动的声音。实施例方法包括组合表面的局部运动的表示以产生表面的全局运动信号。局部运动被捕获在表面特征的一系列图像中，并且全局运动信号表示表面位于的环境内的声音。一些实施例比较了表面的局部运动的表示，以确定哪些运动是彼此同相或异相的，从而可以实现表面振动模式的可视化。与使用主动感测的其它形式的远程音频恢复（例如激光麦克风系统）相比，实施例是无源的。实施例的示例应用包括间谍和监视。

18. 发明授权

US10997329B2 Motion sensing wi-fi sensor networks for continuous 3D modeling and prediction of facility responses to disturbances 有权
公开(公告)号：US10997329B2
公开(公告)日：2021-05-04
申请号：US15012463
申请日：2016-02-01
申请人： Massachusetts Institute of Technology , Shell Oil Company
发明人： William T. Freeman , Oral Buyukozturk , John W. Fisher, III , Frederic Durand , Hossein Mobahi , Neal Wadhwa , Zoran Dzunic , Justin G. Chen , James Long , Reza Mohammadi Ghazi , Theodericus Johannes Henricus Smit , Sergio Daniel Kapusta
IPC分类号： G06F30/23 , G01M5/00 , G01H1/00 , H04N7/18 , G06N20/00
摘要： Structural health monitoring (SHM) is essential but can be expensive to perform. In an embodiment, a method includes sensing vibrations at a plurality of locations of a structure by a plurality of time-synchronized sensors. The method further includes determining a first set of dependencies of all sensors of the time-synchronized sensors at a first sample time to any sensors of a second sample time, and determining a second set of dependencies of all sensors of the time-synchronized sensors at the second sample time to any sensors of a third sample time. The second sample time is later than the first sample time, and the third sample time is later than the second sample time. The method then determines whether the structure has changed if the first set of dependencies is different from the second set of dependencies. Therefore, automated SHM can ensure safety at a lower cost to building owners.

19. 发明授权

US10636149B2 Devices for refractive field visualization 有权
$Devices for refractive field visualization$
公开(公告)号：US10636149B2
公开(公告)日：2020-04-28
申请号：US15819791
申请日：2017-11-21
申请人： Massachusetts Institute of Technology
发明人： William T. Freeman , Frederic Durand , Tianfan Xue , Michael Rubinstein , Neal Wadhwa
IPC分类号： G02B27/54 , G06T7/20 , G06T7/246 , G01P5/00 , G01P5/26
CPC分类号： G06T7/20 , G01P5/001 , G02B27/54 , G06T7/246 , G01P5/26 , G06T2207/10016 , G06T2207/10021 , G06T2207/10056 , G06T2207/30241
摘要： An apparatus according to an embodiment of the present invention enables measurement and visualization of a refractive field such as a fluid. An embodiment device obtains video captured by a video camera with an imaging plane. Representations of apparent motions in the video are correlated to determine actual motions of the refractive field. A textured background of the scene can be modeled as stationary, with a refractive field translating between background and video camera. This approach offers multiple advantages over conventional fluid flow visualization, including an ability to use ordinary video equipment outside a laboratory without particle injection. Even natural backgrounds can be used, and fluid motion can be distinguished from refraction changes. Embodiments can render refractive flow visualizations for augmented reality, wearable devices, and video microscopes.

20. 发明授权

US10288420B2 Laser speckle photography for surface tampering detection 有权
公开(公告)号：US10288420B2
公开(公告)日：2019-05-14
申请号：US14815092
申请日：2015-07-31
申请人： Massachusetts Institute of Technology
发明人： YiChang Shih , Myers Abraham Davis , Samuel Wiliam Hasinoff , Frederic Durand , William T. Freeman
IPC分类号： G06K9/62 , G06T7/70 , H04N7/18 , G01B11/25 , G01B11/30 , H04N7/08
摘要： In one embodiment, a method comprises projecting, from a projector, a diffused on an object. The method further includes capturing, with a first camera in a particular location, a reference image of the object while the diffused is projected on the object. The method further includes capturing, with a second camera positioned in the particular location, a test image of the object while the diffused is projected on the object. The method further includes comparing speckles in the reference image to the test image. The projector, first camera and second camera are removably provided to and positioned in a site of the object.

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