基于B超成像的浑水地形可视化测量与模型重建

发布时间：2018-04-05 07:51

本文选题：超声成像　切入点：浑水地形　出处：《天津大学学报(自然科学与工程技术版)》2017年03期

【摘要】：河工模型试验中,浑水地形的实时观测与模型重建对研究泥沙运动与河床演变规律具有重要的意义.本文针对B超成像仪获取的水下实时地形图像,提出了一种浑水地形的可视化实时测量与三维模型重建方法.该方法根据相近连续多帧图像中地形地貌的相似性和渐变性,自动跟踪识别水下床面地形边界线,实时监测水下地形的变化情况并进行三维重建.试验结果表明浑水地形的可视化测量误差和重建后的三维地形偏差均不大于1,mm,有效消除了床面附近运动泥沙颗粒的成像干扰,再现了浑浊水流下的沙波地形原貌.该方法直观快捷、实时性好,可作为水流泥沙运动规律研究和沙波地形观测及其冲淤情况分析的一种有效手段.
[Abstract]:The real-time observation of muddy water topography and model reconstruction are of great significance to the study of sediment movement and river bed evolution in river model tests.In this paper, a visualized real-time measurement method and 3D model reconstruction method for muddy water terrain are proposed for underwater real-time terrain images obtained by B-mode ultrasound imagers.According to the similarity and gradual variation of terrain and landform in similar continuous multi-frame images, the method automatically tracks and recognizes the boundary line of underwater bed terrain, monitors the change of underwater terrain in real time and carries out 3D reconstruction.The experimental results show that the visual measurement error of muddy water topography and the reconstructed 3D terrain deviation are less than 1mm, which can effectively eliminate the imaging interference of moving sediment particles near the bed surface and reproduce the original topography of sand wave under turbid water flow.This method is intuitionistic and fast, and can be used as an effective method for the study of the movement of water and sediment, the observation of sand wave topography and the analysis of scour and deposition.
【作者单位】：武汉大学电子信息学院;中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室;
【基金】：国家自然科学基金资助项目(41402278,41372317) 中央高校基本科研业务费专项资金资助项目(2014212020205)~~
【分类号】：TV221.1;TP391.41

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