摘 要 小波变换是时间频率的局部化分析，它可以通过伸缩平移运算对信号逐步进行多尺度细化。本文正是基于小波变换在图像处理领域中表现出的多尺度分析，提出了用小波变换检测活塞环图像边缘的方法，这种方法通过对二维小波变换图像局部极大值的检测得到图像的边缘信息。通过实验证明了这种方法的有效性。-Abstract wavelet transform is the local time frequency analysis, it can shift computing through telescopic right signal Multiscale gradually thinning. This paper is based on wavelet transform in the field of image processing performance of the multi-scale analysis of the wavelet transform piston ring Edge detection method, the method of wavelet transform two-dimensional images of the local extreme value to detect the edges in the image information. Experiments show that this method is effective.