基于改进的边界追踪算法的管道法兰焊缝识别

针对目前管道法兰焊接中存在的缺点，文中对管道法兰焊缝进行先检测后识别，提出了一种基于改进的边界追踪算法的管道法兰焊缝识别方法.在焊缝检测阶段，利用曲率角估计的方法精确确定焊缝位置.在焊缝识别阶段，利用膨胀和掩码操作，根据检测到的焊缝位置，提出了一种在原图中设置不规则感兴趣区域的方法；细化边缘，并提出一种过滤伪边缘的算法.通过实际焊缝的试验验证，结果表明，基于改进的边界追踪算法的管道法兰焊缝识别方法能够准确的识别焊缝边缘，并且系统的识别稳定性好.

Recognition of weld seam for pipe flange based on improved boundary following algorithm

For the disadvantages existing in the current pipe flange welding, a method was proposed to of recognize the weld seam for pipe flange based on improved boundary following algorithm, which is divided into two steps of detecting the position of weld seam and then recognizing the weld seam accurately. At first, a method of curvature estimation was applied to position the weld seam in the detecting process. Secondly, a method to set irregular region of interest through dilation and mask in the original image was proposed based on the position of weld seam. And then the edge was thinned, and an algorithm was proposed to filter the pseudo edge. Experiments results showed that the proposed method is reliable and can recognize the weld seam accurately.