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Visual Vibration Tomography: Estimating Interior Material Properties from Monocular Video

Feng, Berthy and Ogren, Alexander C. and Daraio, Chiara and Bouman, Katherine L. (2021) Visual Vibration Tomography: Estimating Interior Material Properties from Monocular Video. . (Unpublished)

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An object's interior material properties, while invisible to the human eye, determine motion observed on its surface. We propose an approach that estimates heterogeneous material properties of an object directly from a monocular video of its surface vibrations. Specifically, we estimate Young's modulus and density throughout a 3D object with known geometry. Knowledge of how these values change across the object is useful for characterizing defects and simulating how the object will interact with different environments. Traditional non-destructive testing approaches, which generally estimate homogenized material properties or the presence of defects, are expensive and use specialized instruments. We propose an approach that leverages monocular video to (1) measure and object's sub-pixel motion and decompose this motion into image-space modes, and (2) directly infer spatially-varying Young's modulus and density values from the observed image-space modes. On both simulated and real videos, we demonstrate that our approach is able to image material properties simply by analyzing surface motion. In particular, our method allows us to identify unseen defects on a 2D drum head from real, high-speed video.

Item Type:Report or Paper (Discussion Paper)
Related URLs:
URLURL TypeDescription Paper
Daraio, Chiara0000-0001-5296-4440
Bouman, Katherine L.0000-0003-0077-4367
Additional Information:The authors would like to thank Michael Rubinstein and Bill Freeman for their helpful discussions. This work is funded by Beyond Limits Inc. B.F. is supported by a Kortschak Scholarship. C.D. and A.C.O. acknowledge support from DOE award no. DE-SC0021253 and NSF award no. 1835735.
Group:Astronomy Department
Funding AgencyGrant Number
Kortschak Scholars ProgramUNSPECIFIED
Department of Energy (DOE)DE-SC0021253
Record Number:CaltechAUTHORS:20210604-142555952
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:109399
Deposited By: George Porter
Deposited On:07 Jun 2021 14:05
Last Modified:07 Jun 2021 14:05

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