System and method for automated extraction of high resolution structural dynamics from video
A method for extracting vibrational modes of a structure includes: receiving a plurality of video frames, each of the video frames including a plurality of pixels; decomposing each of the video frames on a plurality of spatial scales in accordance with complex steerable pyramid filters to obtain a filter response for each of the spatial scales; computing a plurality of local phases of the pixels of each frame; removing a temporal mean from each frame to obtain a plurality of factored vibration motion functions; performing principal component analysis on the factored vibration motion functions to obtain principal components; blind source separating the principal components to compute a plurality of modal coordinates; computing frequency and damping ratios in accordance with the modal coordinates; and outputting the computed frequency and damping ratios.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC52-06NA25396
- Assignee:
- Triad National Security, LLC (Los Alamos, NM)
- Patent Number(s):
- 10,567,655
- Application Number:
- 15/708,986
- OSTI ID:
- 1632585
- Resource Relation:
- Patent File Date: 09/19/2017
- Country of Publication:
- United States
- Language:
- English
Principal Component Analysis and Blind Separation of Sources for Optical Imaging of Intrinsic Signals
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journal | May 2000 |
Riesz Pyramids For Fast Phase-Based Video Magnification
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patent-application | July 2015 |
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