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http://dx.doi.org/10.7848/ksgpc.2013.31.2.159

Displacement Measurement of a Floating Structure Model Using a Video Data  

Han, Dong Yeob (전남대학교 공학대학 해양토목공학과)
Kim, Hyun Woo (한국시설안전공단)
Kim, Jae Min (전남대학교 공학대학 해양토목공학과)
Publication Information
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography / v.31, no.2, 2013 , pp. 159-164 More about this Journal
Abstract
It is well known that a single moving camera video is capable of extracting the 3-dimensional position of an object. With this in mind, current research performed image-based monitoring to establish a floating structure model using a camcorder system. Following this, the present study extracted frame images from digital camcorder video clips and matched the interest points to obtain relative 3D coordinates for both regular and irregular wave conditions. Then, the researchers evaluated the transformation accuracy of the modified SURF-based matching and image-based displacement estimation of the floating structure model in regular wave condition. For the regular wave condition, the wave generator's setting value was 3.0 sec and the cycle of the image-based displacement result was 2.993 sec. Taking into account mechanical error, these values can be considered as very similar. In terms of visual inspection, the researchers observed the shape of a regular wave in the 3-dimensional and 1-dimensional figures through the projection on X Y Z axis. In conclusion, it was possible to calculate the displacement of a floating structure module in near real-time using an average digital camcorder with 30fps video.
Keywords
Video; Displacement; Foating structure; Tracking;
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Times Cited By KSCI : 2  (Citation Analysis)
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