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16 October 2015 Comparison of high speed imaging technique to laser vibrometry for detection of vibration information from objects
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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.
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Gabriela Paunescu, Peter Lutzmann, Benjamin Göhler, and Daniel Wegner "Comparison of high speed imaging technique to laser vibrometry for detection of vibration information from objects", Proc. SPIE 9649, Electro-Optical Remote Sensing, Photonic Technologies, and Applications IX, 96490D (16 October 2015); https://doi.org/10.1117/12.2194753
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