表面微缺陷形态小波提取方法研究

作者：吕晶晶,吴立群,徐瑞芬 日期：2008-12-26/span> 浏览：3788 查看PDF文档

表面微缺陷形态小波提取方法研究

吕晶晶,吴立群,徐瑞芬
（杭州电子科技大学 机械工程学院，浙江 杭州 310018）

摘要：为了解决小波由于不具有平移不变性而在处理信号时出现畸变效应的问题，在提升小波变换的基础上，结合形态小波和冗余变换的优点，构造了冗余提升形态小波，解决了提升小波变换在信号处理过程中的畸变效应；并选用极大值冗余提升形态Haar小波，使用模拟数据进行了数据处理实验。数据处理试验结果表明，冗余提升形态小波具有平移不变性的特点。
关键词：提升方案；形态小波；平移不变性；Haar小波
中图分类号：TH161.14文献标识码：A文章编号：1001-4551(2008)12-0103-05

Study of surface micro-cracks extraction based on morphological wavelet transform
LV Jing-jing, WU Li-qun, XV Rui-fen
(College of Mechanical Engineering, Hangzhou Dianzi University, Hangzhou 310018, China)
Abstract: Aiming at resolving the distortion effects on the process of signal processing, using lifting wavelet transform which doesn’t have the character of translation-invariance, the redundancy lifting morphological wavelet transform was developed, with the advantages of morphological wavelet and redundancy lifting transform based on the lifting wavelet transform. The maximum redundancy lifting morphological Haar wavelet was selected, and simulation data for the experimental signal processing was used. The test results indicate that the redundancy lifting morphological wavelet transform has the character of translation-invariance.
Key words: lifting scheme; morphological wavelet; translation-invariance; Haar wavelet
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