A method for automatic acquisition of underwater construction control events based on sonar image processing

Abstract

The invention discloses an underwater construction control event automatic acquisition method based on sonar image processing, and the method comprises the steps: projecting a three-dimensional pointcloud to an XOY plane, and obtaining an initial image through discretization; carrying out Canny operator edge extraction and Hough transformation straight line detection on the initial image, dividing the initial image into an upper part and a lower part by the characteristic straight line I, and respectively carrying out nonlinear filtering, morphological closing operation, image hole filling, nonlinear filtering, image hole filling and morphological opening operation; carrying out Canny operator edge extraction and Hough transformation straight line detection on the upper part image and thelower part image; screening out a characteristic straight line II and a characteristic straight line III; and converting an image coordinate system into an actual physical coordinate system, and solving the overlapping width according to the relationship between the characteristic straight lines 1 to 3. The method has the advantages that the measurement accuracy is high, the stability is good, sonar data can be automatically and quickly processed, and the arranged overlapping distance can be synchronously obtained.

Description

technical field [0001] The invention belongs to the field of sonar technology and digital image processing; in particular, it relates to an automatic acquisition method for underwater construction control events based on sonar image processing. Background technique [0002] The sunken bank protection project is a commonly used riverbed treatment measure. The construction elements are: on the bank, the weight blocks are evenly fixed on the arrangement, and the arranged ballast is placed on the bottom of the sinking area as a whole, so that Methods to achieve the purpose of protecting the bottom of the riverbed. In actual operation, in order to ensure that the river bed is completely covered by the arrangement, it is necessary to lay multiple pieces of the arrangement on the designated underwater area, and leave an overlapping area (called the overlapping area) between the two arrangements, and measure the overlapping area The significance of the width is to inspect whether t...

AI Technical Summary

Problems solved by technology

This method completely relies on manual operation and is greatly affected by the operator's skills and experience, and the on-site environment, the length of the operation time, and the operator's personal working status will all affect the interpretation results.

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