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  2019,Vol.14no.1 ,page:220-230

A Rapid Width Detection Method of House Crack in Earthquake Field
Abstract:      The evaluation of seismic intensity is an important task in the field investigation after the earthquake. The assessment of the damage level of the house is one of the critical factors for the evaluation of seismic intensity,and the crack width is an important indicator of the level of damage to a house. In order to measure the crack width of damaged houses quickly in the earthquake field, this paper proposes an image processing technique and a single artificial square mark method to measure the crack width. Based on the digital image processing technology, we use the powerful image processing functions of MATLAB to calculate the maximum width of house crack by means of image gray-scale, binarization, image denoising, segmentation of target area and pixel correction. The results show that compared with the measured data, the recognition accuracy of the data of the width of house crack is 98.11% due to the calculation method proposed. The higher the resolution of the image acquisition device is, the smaller the error of the recognition width will be. It shows that the algorithm can effectively detect the width of house crack and provide the basis for the evaluation of the damage degree of the house.
Author NameAffiliation
Yang Gang Key Laboratory of Earthquake Geodesy, Institute of Seismology, China Earthquake Administration, Wuhan 430071, China;Wuhan Institute of Earthquake Engineering Co., Ltd., Wuhan 430071, China 
Wu Jianchao Key Laboratory of Earthquake Geodesy, Institute of Seismology, China Earthquake Administration, Wuhan 430071, China;Wuhan Institute of Earthquake Engineering Co., Ltd., Wuhan 430071, China 
Cai Yongjian Key Laboratory of Earthquake Geodesy, Institute of Seismology, China Earthquake Administration, Wuhan 430071, China;Wuhan Institute of Earthquake Engineering Co., Ltd., Wuhan 430071, China 
Qiao Yueqiang Key Laboratory of Earthquake Geodesy, Institute of Seismology, China Earthquake Administration, Wuhan 430071, China;Wuhan Institute of Earthquake Engineering Co., Ltd., Wuhan 430071, China 
Hu Qing Key Laboratory of Earthquake Geodesy, Institute of Seismology, China Earthquake Administration, Wuhan 430071, China;Wuhan Institute of Earthquake Engineering Co., Ltd., Wuhan 430071, China 
Tang Yong Key Laboratory of Earthquake Geodesy, Institute of Seismology, China Earthquake Administration, Wuhan 430071, China;Wuhan Institute of Earthquake Engineering Co., Ltd., Wuhan 430071, China 
Keywords:    Earthquake field  House crack  Digital image processing  Crack width  MATLAB
Received on:  May 08, 2018
地震现场房屋裂缝宽度快速检测
摘要:    为快速对地震现场损坏房屋裂缝宽度进行测量,本文提出运用图像处理技术与单个人工正方形标志的方法对裂缝宽度进行测量。基于数字图像处理技术,并利用MATLAB软件的图像处理功能,对拍摄的真实房屋裂缝图像进行灰度化、二值化、图像去噪、目标区域分割标记和像素标定等处理,计算得到图像中裂缝宽度的最大值。通过与实测数据对比,利用本方法获得房屋裂缝检测数据的识别精度为98.11%。结果表明,本文提出的方法可以有效检测房屋裂缝宽度,且获取图像的分辨率越高,裂缝宽度识别的误差越小。本方法可为地震灾害现场调查中的房屋破坏等级评价工作提供依据。
关  键  词:地震现场  房屋裂缝  图像处理  裂缝宽度  MATLAB
基金项目:中国地震局地震研究所所长基金(IS201726163),国家自然科学基金(41572354)
作者简介:杨钢,男,生于1987年。工程师。主要从事地震地质、建筑安全鉴定研究。E-mail:yangg8710@126.com
引用本文格式:杨钢,吴建超,蔡永建,乔岳强,胡庆,汤勇.地震现场房屋裂缝宽度快速检测[J].震灾防御技术英文版,2019,14(1):220-230  DOI:10.11899/zzfy20190121
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