摘要
针对表面布有蜂窝麻面等复杂噪声的混凝土裂缝,提出了一种基于动态阈值的混凝土裂缝高抗噪提取方法.首先,通过灰度变换、高斯滤波、信息增强等技术弱化、去除噪声,增强图像中裂缝的亮度,提高裂缝与背景的对比度;然后,采用OTSU阈值分割算法去除伪裂缝,基于裂缝与干扰噪声面积的差异,引入动态阈值,实现各类型裂缝的提取;最后,基于边缘检测和裂缝骨架细化处理,计算裂缝的长度、宽度和面积3项特征参数.基于室内实验和室外实际桥梁拍摄的4组裂缝图像结果表明,4组裂缝的平均宽度分别为2.01、1.07、1.34、0.97 mm,说明该方法适用于不同背景下各类型裂缝的提取,具有较强的鲁棒性.
As for the concrete cracks with complex noise such as honeycomb pockmarks on the surface,a high anti-noise extraction method of concrete cracks based on a dynamic threshold was proposed.Firstly,the noise was weakened and removed by gray-scale transformation,Gaussian filtering,and information enhancement.The brightness of the crack in the image was enhanced,and the contrast between the crack and the background was improved.Then,the OTSU threshold segmentation algorithm was used to remove the pseudo cracks.Based on the difference between the area of cracks and that of interference noise,the dynamic threshold was introduced to realize the extraction of all kinds of cracks.Finally,based on edge detection and crack skeleton refinement,three characteristic parameters including the crack length,the width and the area were calculated.The results of four groups of crack images taken from the laboratory experiments and the actual bridge show that the average widths were 2.01,1.07,1.34 and 0.97 mm,respectively,proving that the proposed method is suitable for the crack extraction of various types under different backgrounds and has strong robustness.
作者
杨才千
李帅
王博昆
陈耀井
洪万
瞿冯
潘勇
Yang Caiqian;Li Shuai;Wang Bokun;Chen Yaojing;Hong Wan;Qu Feng;Pan Yong(College of Civil Engineering and Mechanics,Xiangtan University,Xiangtan 411100,China;School of Civil Engineering,Southeast University,Nanjing 210096,China;Jiangsu Expressway Engineering Maintenance Co.,Ltd.,Huaian 223005,China;College of Civil Engineering,Nanjing Technology University,Nanjing 211800,China;Jiangsu Eastern Expressway Management Co.,Ltd.,Yancheng 224002,China)
出处
《东南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2021年第6期967-972,共6页
Journal of Southeast University：Natural Science Edition
基金
国家自然科学基金资助项目(6505009756)
湖南省创新创业技术投资资助项目(2018GK5028).
关键词
复杂噪声
动态阈值
抗噪性能
裂缝骨架
complex noise
dynamic threshold
anti-noise performance
crack skeleton
