图像测量技术在岩土工程CT图像定量分析中的应用

Application of image measuring technique to quantitative analysis of geotechnical engineering CT image

首先对计算机层析成像技术(CT 技术)原理进行了简单的介绍,基于图形图像处理技术,引入了数学形态学中图像平移、反射、腐蚀、膨胀等运算方法,基于定义的兴趣域边界提取算法和形状因子实现了其几何测量和空间描述,定量分析了 CT 图像兴趣域的空间物理特性。该方法异于以往数学建模的思路,而是借用数学形态学中空间几何描述的思想,以实现对岩土体中的天然缺陷及其演化过程进行合理刻画。该项工作对于推动岩土工程 CT 图像定量化描述具有一定意义。

Firstly, the principle of the computerized technology is described briefly. Based on the image and graph disposal technique, the mathematic morphology such as displacing, reflecting, eroding and dilating etc. is introduced into the research of the geotechnical mechanics CT experiment. Under the condition of the region of interest whose boundary pick-up arithmetic and figure gene are defined; the geometry is measured; the spacious physical features of CT image’s ROI are quantitatively analyzed. This method is different from ancient mathematic modeling; it borrows the concept of space geometry description used in mathematic morphology. Finally, the reasonable portray of the raw flaws and their evolution is realized. The method is important for the quantitative analysis of CT image.