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Open AccessArticle

Visual Calibration for Multiview Laser Doppler Speed Sensing

Department of Creative Informatics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
Department of Information and Communications Engineering, School of Engineering, Tokyo Institute of Technology, 4259-G2-31, Nagatsuta, Midori-ku, Yokohama, Kanagawa 226-8502, Japan
Author to whom correspondence should be addressed.
Sensors 2019, 19(3), 582;
Received: 24 December 2018 / Revised: 24 January 2019 / Accepted: 25 January 2019 / Published: 30 January 2019
(This article belongs to the Special Issue Laser Sensors for Displacement, Distance and Position)
We present a novel calibration method for a multi-view laser Doppler speed sensing (MLDSS) system. In contrast with the traditional method where only the laser geometry is independently calibrated, the proposed method simultaneously optimizes all the laser parameters and directly associates the parameters with a motion sensing model. By jointly considering the consistency among laser Doppler velocimetry, the laser geometry and a visual marker tracking system, the proposed calibration method further boosts the accuracy of MLDSS. We analyzed the factors influencing the precision, and quantitatively evaluated the efficiency of the proposed method on several data sets. View Full-Text
Keywords: calibration; motion sensing; laser doppler velocimetry; computer vision; optimization calibration; motion sensing; laser doppler velocimetry; computer vision; optimization
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Hu, Y.; Miyashita, L.; Watanabe, Y.; Ishikawa, M. Visual Calibration for Multiview Laser Doppler Speed Sensing. Sensors 2019, 19, 582.

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