
Proceedings Paper
Single video camera method for using scene metrics to measure constrained 3D displacementsFormat | Member Price | Non-Member Price |
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Paper Abstract
There are numerous ways to use video cameras to measure 3D dynamic spatial displacements. When the scene
geometry is unknown and the motion is unconstrained, two calibrated cameras are required. The data from both scenes
are combined to perform the measurements using well known stereoscopic techniques. There are occasions where the
measurement system can be simplified considerably while still providing a calibrated spatial measurement of a complex
dynamic scene. For instance, if the sizes of objects in the scene are known a priori, these data may be used to provide
scene specific spatial metrics to compute calibration coefficients. With this information, it is not necessary to calibrate
the camera before use, nor is it necessary to precisely know the geometry between the camera and the scene. Field-ofview
coverage and sufficient spatial and temporal resolution are the main camera requirements. Further simplification
may be made if the 3D displacements of interest are small or constrained enough to allow for an accurate 2D projection
of the spatial variables of interest. With proper camera orientation and scene marking, the apparent pixel movements
can be expressed as a linear combination of the underlying spatial variables of interest. In many cases, a single camera
may be used to perform complex 3D dynamic scene measurements. This paper will explain and illustrate a technique
for using a single uncalibrated video camera to measure the 3D displacement of the end of a constrained rigid body
subject to a perturbation.
Paper Details
Date Published: 5 September 2014
PDF: 9 pages
Proc. SPIE 9202, Photonics Applications for Aviation, Aerospace, Commercial, and Harsh Environments V, 92021L (5 September 2014); doi: 10.1117/12.2064069
Published in SPIE Proceedings Vol. 9202:
Photonics Applications for Aviation, Aerospace, Commercial, and Harsh Environments V
Alex A. Kazemi; Bernard C. Kress; Edgar A. Mendoza, Editor(s)
PDF: 9 pages
Proc. SPIE 9202, Photonics Applications for Aviation, Aerospace, Commercial, and Harsh Environments V, 92021L (5 September 2014); doi: 10.1117/12.2064069
Show Author Affiliations
L. R. Gauthier Jr., Johns Hopkins Univ. Applied Physics Lab., LLC (United States)
M. E. Jansen, Johns Hopkins Univ. Applied Physics Lab., LLC (United States)
M. E. Jansen, Johns Hopkins Univ. Applied Physics Lab., LLC (United States)
J. R. Meyer, Johns Hopkins Univ. Applied Physics Lab., LLC (United States)
Published in SPIE Proceedings Vol. 9202:
Photonics Applications for Aviation, Aerospace, Commercial, and Harsh Environments V
Alex A. Kazemi; Bernard C. Kress; Edgar A. Mendoza, Editor(s)
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