| 一种V型坡口焊缝图像处理方法及特征提取算法研究 |
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| 引用本文： | 梁立鹏,陆永华,谭杰.一种V型坡口焊缝图像处理方法及特征提取算法研究[J].测试技术学报,2021,35(1):42-48. |
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| 作者姓名： | 梁立鹏 陆永华 谭杰 |
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| 作者单位： | 南京航空航天大学 机电学院,江苏 南京 210016;国营锦江机器厂,四川 成都 610000 |
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| 基金项目： | 江苏省研究生科研与实践创新计划资助项目(KYCX19_0168)。 |
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| 摘 要： | 为了提高V型坡口焊缝特征提取算法的效率和准确性,对V型坡口光条图像预处理,在图像感兴趣区域(Region of Interest,ROI)开窗基础上构建差异化卷积模板,经图像差分后实现光条纹增强及噪声颗粒化.通过形态学开运算和小连通域去除提取出二值化光条,并采用几何中心法完成光条骨架细化.通过对光条形态学特征分析,初步...
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| 关 键 词： | 机器视觉 焊缝图像处理 V型坡口 光条中心提取 特征提取 |
A Pre-Processing and Feature Point Extraction Algorithm for V-Groove Weld Images |
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| LIANG Lipeng,LU Yonghua,TAN Jie.A Pre-Processing and Feature Point Extraction Algorithm for V-Groove Weld Images[J].Journal of Test and Measurement Techol,2021,35(1):42-48. |
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| Authors: | LIANG Lipeng LU Yonghua TAN Jie |
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| Affiliation: | (College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;Jinjiang Machinery Factory, Chengdu 610000, China) |
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| Abstract: | The V-groove stripe images is preprocessed to improve the efficiency and accuracy of the algorithm for feature extraction of V-groove welds.The differential convolution templates are constructed on the regions of interest(ROI),the laser stripe enhancement and noise granulation are realized after image difference.The binarized laser stripe is extracted by morphological opening operation and small connected domain removal,and the stripe skeleton refinement is completed by the geometric center method.The morphological characteristics of the V-groove stripe is analyzed,and the stripe center-lines are extracted in different regions rely on calculation of corner points.The precise feature points of the weld are obtained.The experimental results show that this method can effectively remove noise and accurately extract sub-pixel feature points.The efficiency of the proposed algorithm is 60%higher than traditional corner detection algorithms,which meets the high-accuracy and real-time requirements of industrial applications. |
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| Keywords: | machine vision weld image processing V-groove stripe center extraction feature extraction |
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