局部环境焊缝初始位置图像识别方法

Image recognition of the weld initial position in the local environment

焊缝初始位置的自动识别与定位是实现智能化焊接的关键步骤之一。介绍一种边缘线相交定位初始焊缝位置的方法。通过由粗到精的2步模板匹配方法提取出焊缝初始位置区域。然后对初始位置区域进行图像处理,得到焊缝边缘特征,结合焊缝物理尺寸和摄像机参数信息分离边缘像素点并组成3个像素点集合,最后对分离出的像素点集进行最小二乘法直线拟合。试验表明,该方法运算速度快,能够有效地识别焊缝起始点,具有较高的实用价值。

The autonomous localization of initial welding position was one of the key technologies to realize intelligentized welding.A edge line intersecting method to locate initial welding position was described.First,using template matching method to extract the the welding initial position area from coarse to fine.The second step was to image processing the initial position area.It could get the weld edge feature.Combined weld physical size and camera parameter information to separate edge pixels to three set,and using least-squares ways to fit the isolated pixels in a straight line.Experiments showed that the method could effectively identify the starting point of the weld.The method had a high computing speed and high practical value.