Non-subsampled non-aliasing Contourlct transform and its denoising algorithm with adaptive thresholding

摘要：

This document focused on the frequency aliasing and shift-variance of Contourlet transform,this paper proposed a non-subsampled non-aliasing Contourlet transform(NS-NACT) constructed by combining nonsubsampled non-aliasing pyramidal filter banks(NSNPFB) with undecimated directional filter banks (UDFB).The low-pass filter banks of NS-INAFB satisfy perfect reconstruction rule and Nyquist sampling theorem,then NS-NACT not only effectively restrains the frequency aliasing of Contourlet transform but also has the characteristic of shift-invariance.

关键词： Contourlet transform aliasing non-subsampled adaptive threshold

作者: CHENG WEI REN YONG

作者单位: College of Computer Science and Engineering Chongqing University of Technolog Chongqing,China College of Communication engineering Chongqing University Chongqing,China

会议类型: 国际会议

会议名称: 2011 3rd International Conference on Computer and Network Technology(ICCNT 2011)(2011第三届IEEE计算机与网络技术国际会议)

会议地点: 太原

会议语种:英文

页码: 253-256

在线出版日期: 2011-02-26（万方平台首次上网日期，不代表论文的发表时间）