在MATLAB环境下实现膨胀土CT图像的三维重建  

3-D Reconstruction for CT Images of Expansive Soil Based on MATLAB

作　　者：蒋运忠[1] 王云亮[1] 汪时机[1,2] 

机构地区：[1]西南大学工程技术学院,重庆400716 [2]中国人民解放军后勤工程学院,重庆400041

出　　处：《西南大学学报（自然科学版）》2011年第3期144-148,共5页Journal of Southwest University(Natural Science Edition)

基　　金：国家大学生创新性实验计划项目(091063544);国家自然科学基金资助项目(10902091);中国博士后科学基金资助项目(20090450202);重庆市自然科学基金资助项目(2009BB8114)

摘　　要：首先介绍国内外膨胀土三维重建的研究状况,然后通过CT-三轴试验和基于分割的Marching Cubes算法,对膨胀土CT扫描图像进行了三维重建.主要方法是通过对试验扫描得到的CT图像进行格式转换、图像增强、边缘提取等初步处理,生成三维体数据,然后应用Matlab等工具软件的三维重建程序进行建模,最终得到膨胀土的三维模型图.还通过观察重建后的实体图,对膨胀土受压变形状态进行了定性分析,得出了三轴压缩条件下的膨胀土闭合程度与应力状态有关的结论.This article firstly presents a review of the research of 3-D reconstruction of expansive soil in China and other countries in the world and then builds the 3-D reconstruction for the CT scan images of expansive soil through CT-triaxial soaking test and Marching Cubes algorithm based on segmentation.The main methods adopted for the generation of 3-D volume data include image format conversion,image enhancement and edge extraction preliminary treatment for the CT scan image.Subsequently,the Matlab software tools are used to build the 3-D reconstruction program model and finally gain the figure of expansive soil 3-D model.By observing the entity graph after the reconstruction,a qualitative analysis is made of expansive soil deformation state and a conclusion is reached that expansive soil closed degree is relevant to stress state under the condition of triaxial compression.

关 键 词：MATLAB 膨胀土 CT图像 三维重建 

分 类 号：TU443[建筑科学—岩土工程]