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Comparison of high speed imaging technique to laser vibrometry for detection of vibration information from objects

 
: Paunescu, Gabriela; Lutzmann, Peter; Göhler, Benjamin; Wegner, Daniel

:

Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Electro-Optical Remote Sensing, Photonic Technologies, and Applications IX : 21. September 2015, Toulouse, France
Bellingham, WA: SPIE, 2015 (Proceedings of SPIE 9649)
ISBN: 978-1-62841-859-0
Paper 96490D, 11 pp.
Conference "Electro-Optical Remote Sensing, Photonic Technologies, and Applications" <9, 2015, Toulouse>
English
Conference Paper
Fraunhofer IOSB ()
high speed imaging technique; laser Doppler vibrometry; vibration information

Abstract
The development of camera technology in recent years has made high speed imaging a reliable method in vibration and dynamic measurements. The passive recovery of vibration information from high speed video recordings was reported in several recent papers. A highly developed technique, involving decomposition of the input video into spatial subframes to compute local motion signals, allowed an accurate sound reconstruction. A simpler technique based on image matching for vibration measurement was also reported as efficient in extracting audio information from a silent high speed video. In this paper we investigate and discuss the sensitivity and the limitations of the high speed imaging technique for vibration detection in comparison to the well-established Doppler vibrometry technique. Experiments on the extension of the high speed imaging method to longer range applications are presented.

: http://publica.fraunhofer.de/documents/N-367473.html