混凝土CT图像的几何校正  

Reserching on Geometric Correction of Concrete CT Image

作　　者：丁卫华[1] 雷曼[1] 郭锐[1] 

机构地区：[1]西安理工大学土木建筑工程学院,西安710048

出　　处：《CT理论与应用研究（中英文）》2012年第2期255-261,共7页Computerized Tomography Theory and Applications

基　　金：国家自然科学基金项目(50979092)

摘　　要：细观裂纹是混凝土CT研究的主要对象。直观地观察混凝土灰度CT图像细观裂纹的产生和变化有一定困难,需要根据差值CT图像的方法对其进行增强处理。发现差值图像存在阴阳环现象,因此在进行差值运算前首先需进行图像校正,包括整体平移校正、整体几何校正和感兴趣区域校正三种方法,感兴趣区域校正的差值图像最客观。本文提出了有效地提取混凝土CT图像内细观裂纹信息的新方法。Meso-crack of concrete in CT image is the key object to study.It’s very difficult to observe directly meso-crack of concrete in CT image based on grey scale conception.Image enhancement processing method is needed to CT image according to subtraction conception.Subtraction CT image has some shadow-positive circle phenomenon.So before subtraction operation,CT image is needed to correct.Correction methods including whole translation,whole geometric and region of interest correction method,while region of interest correction method is objective.This paper proposes a new useful method to gain meso-crack information of concrete in CT image.

关 键 词：混凝土 CT 差值图像 几何校正 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]