| 用于焊缝检测的X射线实时图像序列时空域滤波 |
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| 引用本文： | 侯润石,都东,邵家鑫,朱新杰.用于焊缝检测的X射线实时图像序列时空域滤波[J].清华大学学报(自然科学版),2009(5). |
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| 作者姓名： | 侯润石 都东 邵家鑫 朱新杰 |
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| 作者单位： | 清华大学机械工程系先进成形制造教育部重点实验室; |
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| 基金项目： | 国家自然科学基金资助项目(50875145) |
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| 摘 要： | X射线实时图像处理技术是在线自动检测焊缝缺陷的关键环节。由于原始图像噪声大,严重影响了焊缝缺陷X射线实时自动检测技术的实际应用。该文先对焊缝X射线实时图像序列进行匹配,在此基础上采用扩展的局部线性最小均方差法进行时空域滤波,从而综合利用X射线实时图像序列的时域信息和空域信息。实验结果表明:焊缝X射线实时图像时空域滤波效果明显优于现有的空域滤波和时域滤波,为后续焊缝缺陷检测的图像处理提供了良好条件。
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| 关 键 词： | X射线 焊缝缺陷 无损检测 图像匹配 时空域滤波 |
Spatio-temporal filtering of real-time X-ray images for weld inspections |
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| HOU Runshi,DU Dong,SHAO Jiaxin,ZHU Xinjie.Spatio-temporal filtering of real-time X-ray images for weld inspections[J].Journal of Tsinghua University(Science and Technology),2009(5). |
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| Authors: | HOU Runshi DU Dong SHAO Jiaxin ZHU Xinjie |
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| Institution: | Key Laboratory for Advanced Materials Processing Technology of the Ministry of Education;Department of Mechanical Engineering;Tsinghua University;Beijing 100084;China |
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| Abstract: | Real-time X-ray image processing is the key to on-line automatic inspection of weld defects.In practical applications,automatic weld inspections are greatly affected by big noise in the original image.This paper presents a method for analyzing real-time X-ray image sequences where the spatio-temporal filtering of the real-time weld images uses an extended local linear minimum mean square error method,so that the spatial and time domain information can be used together.Experimental results show that the deno... |
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| Keywords: | X-ray weld defect nondestructive testing image registration spatio-temporal filtering |
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