小波变换分析方法是现代迅速发展起来的一门新兴学科，在图像处理方面得到很好的应用。利用小波变换检测信号边缘的优势，对V型焊接激光图像的边缘检测技术进行了系统的研究，对V型坡口焊接激光图像的焊缝识别方法进行了系统的研究，给出了基于小波变换的焊缝识别算法，同时进行了大量的实验研究，提出了一种基于小波变换的V型坡口激光图像光纹提取以及计算焊接纠偏量的方法。

The wavelet analysis is a newly arisen subject and it has been applied to image processing very well. With the advantages of the wavelet analysis edge detecting, we conducted a systemic study on the technology of detecting the image edge and seam recognition of V-groove. A seam recognizing algorithms based on wavelet transform is proposed. Based on the experiments on seam recognition, a method for detecting the image edge of V-groove and calculating the welding deviation is presented.