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Efficient Image Analysis Method for River Flow Measurement Using Space-Time Images

Author(s): Ichiro Fujita; Hideki Watanabe; Ryota Tsubaki

Linked Author(s): Ryota Tsubaki, Ichiro FUJITA

Keywords: River flow measurement; Image analysis; Space-time image velocimetry (STIV); Large-scale image velocimetry (LSPIV); Real time measurement

Abstract: In the past decade, the non-intrusive method for surface flow measurements using a quantitative imaging technique proposed by Fujita and Komura (1994) has been successfully applied for river flow measurements in various field conditions. The method is termed the large-scale particle image velocimetry (LSPIV) by Fujita, Muste and Kruger (1998) as this method is capable to cover the measurement field having a width of one hundred meters or more. However, since LSPIV requires a large storage memory for saving corrected images and takes time for computation, Fujita and Tsubaki (2002, 2005) proposed an alternative practical method, the space-time image velocimetry (STIV), that utilized a space-time image indicating velocity information as its image orientation. In this paper, the efficiency and the accuracy of STIV in observing streamwise velocity distributions are verified by applying the two methods to the actual river flow measurements.

DOI:

Year: 2005

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