首页 | 本学科首页   官方微博 | 高级检索  
     

小波变换点对称边界延拓问题研究
引用本文:孙蕾,罗建书.小波变换点对称边界延拓问题研究[J].计算机应用,2008,28(2):443-445,.
作者姓名:孙蕾  罗建书
作者单位:国防科学技术大学,理学院,长沙,410073
摘    要:比较了几种小波变换的边界延拓方式,对小波变换的点对称延拓进行了边界点的光滑性分析,提出基于奇数长对称小波变换的点对称延拓方式,并证明了它在保持信号数据量不变的情况下是可以完全重构的。对一段有限信号分别采用对称延拓和点对称延拓进行小波分解重构计算,结果表明点对称延拓的重构精度比对称延拓的高。

关 键 词:小波变换  点对称延拓  对称延拓
文章编号:1001-9081(2008)02-0443-03
收稿时间:2007-09-10
修稿时间:2007-11-01

Research of point-symmetric boundary extension in wavelet transform
SUN Lei,LUO Jian-shu.Research of point-symmetric boundary extension in wavelet transform[J].journal of Computer Applications,2008,28(2):443-445,.
Authors:SUN Lei  LUO Jian-shu
Affiliation:SUN Lei,LUO Jian-shu(College of Sciences,National University of Defense Technology,Changsha Hunan 410073,China)
Abstract:This paper compared several boundary extensions based on wavelet transform.In particular,we analyzed the smoothness on boundary after point-symmetric extension,proposed a point-symmetric extension based on odd-length symmetric filter and proved that it preserved the perfect reconstruction while keeping the signal length unchanged.We used both symmetric extension and point-symmetric extension to analyze and reconstruct finite signals.The result shows that the point-symmetric extension's reconstruction precis...
Keywords:wavelet transform  point-symmetric extension  symmetric extension
本文献已被 CNKI 维普 万方数据 等数据库收录!
点击此处可从《计算机应用》浏览原始摘要信息
点击此处可从《计算机应用》下载全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号