According to the characteristics of the scouring process of underwater topography by introducing the image processing and analyzing technology from the medical field, this study proposes a monitoring method for the scouring process of underwater topography which is based on the MATLAB image processing technology and used the red linear laser of 635 nm wavelength as auxiliary photo source. This method has the advantages of non-contacting measurement and real-time synchronous monitoring. At the same time, it puts forward the digital method of reproducing underwater topography on the basis of the MATLAB image recognition theory. Through practical application and error analysis in the research of the local scour of physical model, the results show that this monitoring system is very effective and can achieve the real-time and detailed monitoring and dynamic analysis of the scouring process of underwater topography.
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