纹理无关的轮胎裂纹检测算法

摘要

The paper proposed a new image-based detection method for tire crack-defect according to projection of density of lines (PODOL).First,the PODOL curves are computed from the tire image and their modulus curves of first order derivative are evaluated.Then,a new feature curve is defined and extracted from the first order derivative modulus curves.It will be employed as a new criterion for detecting the crack-defects.The experimental results show that the proposed method is textureinvariant and can be applied to detect crack-defects in tire images efficiently.The proposed method has been used in real-time online tire detection.%根据从图像中提取的裂纹缺陷特征,提出一种基于线密度投影(PODOL)的轮胎裂纹缺陷检测方法.首先对轮胎图像进行线密度投影,得到它们的PODOL一阶导数绝对值曲线；然后提取裂纹图像的特征曲线,以这些特征曲线作为标准判定轮胎是否含有裂纹.实验结果表明,文中提出的特征曲线检测标准不受图像纹理的影响,可以高效地检测轮胎裂纹缺陷；且该方法速度快、实现简单,已经成功用于轮胎裂纹缺陷的实时在线检测.