基于数字图像处理技术的城墙裂缝变形监测研究

Research on deformation monitoring of wall cracks based on digital image processing technology

为了改变传统的变形监测方法存在的费工、费时与危险等弊端,将数字图像处理技术应用于变形监测是一种行之有效的方法。通过对南京明城墙裂缝变形监测图像进行创新的像素标定以及灰度转换等一系列巧妙的图像处理后,获得了裂缝的变形值。实验结果表明,基于数字图像处理技术的变形监测方法,不仅具有较高的精度和可操作性,而且与传统测量方法相比能够显著提高工作效率,对裂缝的定量化变形监测实现非接触式无损测量的目标具有重要的意义。

In order to overcome the shortcoming of the traditional deformation monitoring methods which take a lot of work, time and risks, it＇s an effective way to apply the digital image processing technology into deformation monitoring. Experimental analyses combined with specific project examples are carried out for the new method. After using a series of pixel calibration, grayscale conversion and other image processing procedures in the cracks deformation monitoring images of Nanjing Ming city wall, the deform- ation value of cracks can be got. Experiment results show that the new method of deformation monitoring based on digital image processing technology not only has high accuracy and operability, but also improves efficiency significantly compared with traditional measurement methods. It is of great significance to a- chieve non-contact and non-destructive measurement of the quantitative deformation monitoring of cracks.