宋欢¹, 邹先坚^1,2, 王川婴², 韩增强², 马志敏¹
AuthorsHTML:宋欢¹, 邹先坚^1,2, 王川婴², 韩增强², 马志敏¹
AuthorsListE:Song Huan¹, Zou Xianjian^1,2, Wang Chuanying², Han Zengqiang², Ma Zhimin¹
AuthorsHTMLE:Song Huan¹, Zou Xianjian^1,2, Wang Chuanying², Han Zengqiang², Ma Zhimin¹
Unit:1. 武汉大学电子信息学院，武汉 430072；2. 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，武汉 430071
Unit_EngLish:1．School of Electronic Information, Wuhan University, Wuhan 430072, China
2．State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China
Abstract_Chinese: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_English:Real-time observation and model reconstruction of topography under muddy water are vital for the research of sediment movement and fluvial process in the model test of river engineering. In this paper，a real-time visual measurement and 3D model reconstruction method based on the ultrasonic images obtained by B-mode ultrasound imaging device is described for the topography under muddy water. Based on the similarity and gradual change of topography in the consecutive multi-frame images，this method can automatically indentify underwater riverbed boundary lines，real-time monitor the change of topographic lines and then reconstruct their 3D model topography. Results show that the errors of both visual measurement and 3D reconstruction are less than 1 mm for muddy-water topography in model test. The method can effectively neglect the imaging interference of moving particles and reproduce the topography under muddy water. This method is visual，fast and real-time. It is an effective approach for water-sediment movement research，sand topography monitor and their riverbed erosion and deposition analysis in sediment-laden flow.
Keyword_Chinese:超声成像; 浑水地形; 可视化测量; 三维模型重建; 实时观测
Keywords_English:ultrasound imaging; muddy-water topography; visual measurement; 3D model reconstruction; real-time observation

PDF全文下载地址:http://xbzrb.tju.edu.cn/#/digest?ArticleID=5792