基于二维小波分析的焊缝坡口边缘检测

Welding seam edge detection based on 2-D wavelet analasis

提出一种基于二维小波进行边缘检测的方法。基数B样条函数可以说是对于软件或硬件实现都是比较有效的具有小支撑的最简单的函数,文中采用B样条小波进行焊缝坡口边缘检测。分析了不同方向小波对同一图像处理后的不同效果及尺度对图像小波变换结果的影响。最后提取出焊缝坡口边缘信息。该方法可一次处理较大视觉范围的信息。

We put forward an edge detection approach based on 2-D wavelet in the paper. B-splines is an easiest function which has compact support and is efficient to put into practice via software and hardware, so we use B-splines wavelet to detect welding seam edge. In this paper, it is studied to process the same image with different directional wavelets and to have image wavelet transform at different scales. In the end we extract seam edge information. This approach can be used to process the larger visual range of information.