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Optical Engineering • new

Efficient subtle motion detection from high-speed video for sound recovery and vibration analysis using singular value decomposition-based approach
Author(s): Dashan Zhang; Jie Guo; Yi Jin; Chang’an Zhu
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Paper Abstract

High-speed cameras provide full field measurement of structure motions and have been applied in nondestructive testing and noncontact structure monitoring. Recently, a phase-based method has been proposed to extract sound-induced vibrations from phase variations in videos, and this method provides insights into the study of remote sound surveillance and material analysis. An efficient singular value decomposition (SVD)-based approach is introduced to detect sound-induced subtle motions from pixel intensities in silent high-speed videos. A high-speed camera is initially applied to capture a video of the vibrating objects stimulated by sound fluctuations. Then, subimages collected from a small region on the captured video are reshaped into vectors and reconstructed to form a matrix. Orthonormal image bases (OIBs) are obtained from the SVD of the matrix; available vibration signal can then be obtained by projecting subsequent subimages onto specific OIBs. A simulation test is initiated to validate the effectiveness and efficiency of the proposed method. Two experiments are conducted to demonstrate the potential applications in sound recovery and material analysis. Results show that the proposed method efficiently detects subtle motions from the video.

Paper Details

Date Published: 12 September 2017
PDF: 10 pages
Opt. Eng. 56(9) 094105 doi: 10.1117/1.OE.56.9.094105
Published in: Optical Engineering Volume 56, Issue 9
Show Author Affiliations
Dashan Zhang, Univ. of Science and Technology of China (China)
Anhui Agriculture Univ. (China)
Jie Guo, Univ. of Science and Technology of China (China)
Yi Jin, Univ. of Science and Technology of China (China)
Chang’an Zhu, Univ. of Science and Technology of China (China)

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