Predicting 3D Motions from Single-Camera Optical Test Data

Rohe, D. P.; Witt, B. L.; Schoenherr, T. F.

doi:10.1007/s40799-020-00391-8

Title: Predicting 3D Motions from Single-Camera Optical Test Data

Abstract

In a typical optical test, a stereo camera pair is required to measure the three-dimensional motion of a test article; one camera typically only measures motions in the image plane of the camera, and measurements in the out-of-plane direction are missing. Finite element expansion techniques provide a path to estimate responses from a test at unmeasured degrees of freedom. Treating the case of a single camera as a measurement with unmeasured degrees of freedom, a finite element model is used to expand to the missing third dimension of the image data, allowing a full-field, three-dimensional measurement to be obtained from a set of images from a single camera. The key to this technique relies on the mapping of finite element deformations to image deformations, creating a set of mode shape images that are used to filter the response in the image into modal responses. These modal responses are then applied to the finite element model to estimate physical responses at all finite element model degrees of freedom. The mapping from finite element model to image is achieved using synthetic images produced by a rendering software. Finally, the technique is applied first to a synthetic deformation image, and then is validatedmore » using an experimental set of images.« less

Authors:

^[1]; Witt, B. L. ^[1]; Schoenherr, T. F. ^[1]

Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Publication Date:: 2020-09-18

Research Org.:: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Sponsoring Org.:: USDOE National Nuclear Security Administration (NNSA)

OSTI Identifier:: 1667405

Report Number(s):: SAND-2020-8808J
Journal ID: ISSN 0732-8818; 690141

Grant/Contract Number:: AC04-94AL85000; NA0003525

Resource Type:: Accepted Manuscript

Journal Name:: Experimental Techniques

Additional Journal Information:: Journal Volume: 45; Journal Issue: 3; Journal ID: ISSN 0732-8818

Publisher:: Wiley

Country of Publication:: United States

Language:: English

Subject:: 47 OTHER INSTRUMENTATION; optical; finite element expansion; synthetic images; structural dynamics

Citation Formats


                    Rohe, D. P., Witt, B. L., and Schoenherr, T. F.. Predicting 3D Motions from Single-Camera Optical Test Data.  United States: N. p., 2020. 
Web.  doi:10.1007/s40799-020-00391-8.

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                    Rohe, D. P., Witt, B. L., & Schoenherr, T. F.. Predicting 3D Motions from Single-Camera Optical Test Data.  United States.  https://doi.org/10.1007/s40799-020-00391-8

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                    Rohe, D. P., Witt, B. L., and Schoenherr, T. F.. Fri .  
"Predicting 3D Motions from Single-Camera Optical Test Data".  United States.  https://doi.org/10.1007/s40799-020-00391-8.  https://www.osti.gov/servlets/purl/1667405.

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@article{osti_1667405,

  title        = {Predicting 3D Motions from Single-Camera Optical Test Data},

  author       = {Rohe, D. P. and Witt, B. L. and Schoenherr, T. F.},

  abstractNote = {In a typical optical test, a stereo camera pair is required to measure the three-dimensional motion of a test article; one camera typically only measures motions in the image plane of the camera, and measurements in the out-of-plane direction are missing. Finite element expansion techniques provide a path to estimate responses from a test at unmeasured degrees of freedom. Treating the case of a single camera as a measurement with unmeasured degrees of freedom, a finite element model is used to expand to the missing third dimension of the image data, allowing a full-field, three-dimensional measurement to be obtained from a set of images from a single camera. The key to this technique relies on the mapping of finite element deformations to image deformations, creating a set of mode shape images that are used to filter the response in the image into modal responses. These modal responses are then applied to the finite element model to estimate physical responses at all finite element model degrees of freedom. The mapping from finite element model to image is achieved using synthetic images produced by a rendering software. Finally, the technique is applied first to a synthetic deformation image, and then is validated using an experimental set of images.},

  doi          = {10.1007/s40799-020-00391-8},

  journal      = {Experimental Techniques},

  number       = 3,

  volume       = 45,

  place        = {United States},

  year         = {2020},

  month        = {9}

}

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Works referenced in this record:

EPnP: An Accurate O(n) Solution to the PnP Problem
journal, July 2008

Lepetit, Vincent; Moreno-Noguer, Francesc; Fua, Pascal
International Journal of Computer Vision, Vol. 81, Issue 2
DOI: 10.1007/s11263-008-0152-6

Prediction of Full Field Dynamic Strain from Limited Sets of Measured Data
journal, January 2012

Avitabile, Peter; Pingle, Pawan
Shock and Vibration, Vol. 19, Issue 5
DOI: 10.1155/2012/408919

Distortion of Digital Image Correlation (DIC) Displacements and Strains from Heat Waves
journal, November 2017

Jones, E. M. C.; Reu, P. L.
Experimental Mechanics, Vol. 58, Issue 7
DOI: 10.1007/s11340-017-0354-3

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Title: Predicting 3D Motions from Single-Camera Optical Test Data

Abstract

Citation Formats

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