基于灰度的螺旋缝焊管X光焊缝识别
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摘要
焊缝识别是螺旋缝焊管X光缺陷识别的基础。以MATLAB软件图像处理工具箱IPT为基础,根据螺旋缝焊管X光图像的特征,通过中值滤波、屏蔽等预处理,利用图像梯度及概率求取焊缝中心线,并进一步精化,从而实现焊缝分割。通过实例给出识别算法,并分析该X光焊缝识别方法的适用性。
Welded seam identification is the major purpose of X-ray defect recognition technique for the spiral welded pipe. Based on the MATLAB image toolbox IPT,and according to the characteristics of the X-ray image of the spiral welded pipe, welded seam segmentation is implemented by means of median filtering, ROI shielding pretreatment, and using the image gradient and probability to calculate the weld centerline which is then further refined. Finally,the recognition algorithm is described with actual examples,and the applicability of the X-ray weld seam recognition method is analyzed.
Welded seam identification is the major purpose of X-ray defect recognition technique for the spiral welded pipe. Based on the MATLAB image toolbox IPT,and according to the characteristics of the X-ray image of the spiral welded pipe, welded seam segmentation is implemented by means of median filtering, ROI shielding pretreatment, and using the image gradient and probability to calculate the weld centerline which is then further refined. Finally,the recognition algorithm is described with actual examples,and the applicability of the X-ray weld seam recognition method is analyzed.
引文
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[2]赵国生.MATLAB完全学习手册[M].北京:清华大学出版社,2015.
[3]韩得水.基于X射线平板探测器的直焊缝检测技术[D].太原:中北大学,2014.
[4]丛焕武,郭福娟,吕飞,等.基于CCD图像处理的焊缝识别技术研究[J].电子测量技术,2012,35(3):73-77.
[5]梁硼.X射线焊缝图像缺陷自动提取与识别技术研究[D].南京:南京航空航天大学,2012.
[6]高炜欣,胡玉衡,穆向阳,等.埋弧焊X射线焊缝图像缺陷分割检测技术[J].仪表仪器学报,2011,32(6):1215-1224.
[7]朱钰,杨殿学.统计学[M].北京:国防工业出版社,2012.
[8]谢凤英.数学图像处理及应用[M].北京:电子工业出版社,2014.
[9]李了了,邓善熙,丁兴号.基于大津法的图像分块二值化算法[J].微计算机信息,2005,21(8):76-77.