收藏本站
收藏 | 论文排版

A Wavelet Denoising Method Based on Improved Threshold and Autocorrelation

Ying Qian  
【摘要】:In this paper, the noise of high frequency coefficients in wavelet decomposition is analyzed by autocorrelation function, which may determine which layer's wavelet high frequency coefficients to take part in wavelet reconstruction. The appropriate denoising threshold is selected according to noise in the signal. In considering of the advantages and disadvantages of hard threshold and soft threshold, an improved threshold function is designed. The wavelet high frequency coefficients of each layer are denoised By the improved threshold function and then reconstructed. Combining wavelet threshold denoising with wavelet decomposition and reconstruction, the denoising effectiveness is verified by MATLAB simulations, and the improved threshold function is proved to have better denoising effect than that of hard threshold and soft threshold.

知网文化
【相似文献】
中国期刊全文数据库 前20条
1 Jiaqun WANG;Xiaojing LIU;Youhe ZHOU;;A high-order accurate wavelet method for solving Schrdinger equations with general nonlinearity[J];Applied Mathematics and Mechanics(English Edition);2018年02期
2 GENG Jia;ZHANG XingWu;CHEN XueFeng;XUE XiaoFeng;;High-frequency vibration analysis of thin plate based on wavelet-based FEM using B-spline wavelet on interval[J];Science China(Technological Sciences);2017年05期
3 Huiming Yang;Lei Yu;;Feature extraction of wood-hole defects using wavelet-based ultrasonic testing[J];Journal of Forestry Research;2017年02期
4 Mengfan Xue;Xiaoping Li;Yanming Liu;Haiyan Fang;Haifeng Sun;Lirong Shen;;Denoising of X-ray pulsar observed profile using biorthogonal lifting wavelet transform[J];Journal of Systems Engineering and Electronics;2016年03期
5 赵勇;宗智;邹丽;;Ship hull optimization based on wave resistance using wavelet method[J];Journal of Hydrodynamics;2015年02期
6 ZHANG XingWu;CHEN XueFeng;YANG ZhiBo;SHEN ZhongJie;;Multivariable wavelet finite element for flexible skew thin plate analysis[J];Science China(Technological Sciences);2014年08期
7 YU GuoLiang;GU JianZhong;HOU Long;LI ZhenYu;WANG YanZhao;ZHANG YiYun;;Application of wavelet transform in-ray spectra analysis[J];Science China(Physics,Mechanics & Astronomy);2013年09期
8 CUI Hong-yan;FENG Chen;LIU Yun-jie;;Analysis of prediction performance in wavelet minimum complexity echo state network[J];The Journal of China Universities of Posts and Telecommunications;2013年04期
9 ;Determination of regional earthquake source parameters in wavelet domain[J];Science China(Earth Sciences);2012年02期
10 ;Cycle-slip Detection of GPS Carrier Phase with Methodology of SA4 Multi-wavelet Transform[J];Chinese Journal of Aeronautics;2012年02期
11 ;Image denoising using statistical model based on quaternion wavelet domain[J];Computer Aided Drafting,Design and Manufacturing;2012年02期
12 ;Depressing defocusing effect in microscopy by bi-orthogonal wavelet transform[J];Particuology;2012年05期
13 V F Kravchenko;D V Churikov;;New WA-system of kravchenko functions in digital signal processing[J];Journal of Measurement Science and Instrumentation;2012年04期
14 ;On the aliasing error in a class of bidimensional wavelet subspaces[J];Applied Mathematics:A Journal of Chinese Universities(Series B);2011年01期
15 ;Image inpainting using complex 2-D dual-tree wavelet transform[J];Applied Mathematics:A Journal of Chinese Universities(Series B);2011年01期
16 Nico Sneeuw;;Application of wavelet support vector regression on SAR data de-noising[J];Journal of Systems Engineering and Electronics;2011年04期
17 John C Moore;;Improved significance testing of wavelet power spectrum near data boundaries as applied to polar research[J];Advances in Polar Science;2011年03期
18 LEE Sang-hyuk;王一奇;SONG Jung-il;;Fourier and wavelet transformations application to fault detection of induction motor with stator current[J];Journal of Central South University of Technology;2010年01期
19 陈俊丽;李翔;刘维晓;万旺根;;Vector sampling theorem for wavelet subspaces[J];Journal of Shanghai University(English Edition);2010年01期
20 ;Neurochip based on light-addressable potentiometric sensor with wavelet transform de-noising[J];Journal of Zhejiang University-Science B(Biomedicine & Biotechnology);2010年05期
中国重要会议论文全文数据库 前10条
1 Ying Qian;;A Wavelet Denoising Method Based on Improved Threshold and Autocorrelation[A];第30届中国控制与决策会议论文集(3)[C];2018年
2 HE Yu-min;ZHU Bao-hui;CHANG Wan-ying;;Construction of a flexible wavelet and its application in finite element method[A];第十届动力学与控制学术会议摘要集[C];2016年
3 李鹿辉;;多维正交小波分析技术在流体力学中应用(英文)[A];第九届全国流体力学学术会议论文摘要集[C];2016年
4 Xiao Han;Li li Zhang;Li yao Du;Ke wei Huan;Xiao guang Shi;;Fusion of infrared and visible images based on discrete wavelet transform[A];国防光电子论坛第二届新型探测技术及其应用研讨会论文集[C];2015年
5 曹启武;陈琦;商中新;;Application of wavelet on interval hybrid stress element in composite materials[A];中国计算力学大会2014暨第三届钱令希计算力学奖颁奖大会论文集[C];2014年
6 ;Practical Application of Fuzzy Technology for Experiment Data Analysis of Rotating Machine[A];2009中国控制与决策会议论文集(1)[C];2009年
7 ;Research on wavelet neural network for fault location in power distribution network[A];2009年中国智能自动化会议论文集(第一分册)[C];2009年
8 ;An improved fault detection algorithm based on wavelet analysis and kernel principal component analysis[A];Proceedings of 2010 Chinese Control and Decision Conference[C];2010年
9 ;Study the radial motion error of main spindle of the lathe based on the neural network of harmonic wavelet[A];首届全国航空航天领域中的力学问题学术研讨会论文集(下册)[C];2004年
10 ;Investigation on the motion fault of main spindle using the wavelet neural network[A];2007'仪表,自动化及先进集成技术大会论文集(一)[C];2007年
中国博士学位论文全文数据库 前6条
1 Firas Al Omari;[D];江苏大学;2014年
2 Eidam Ahmed Hebiel Ahmed;[D];华中农业大学;2013年
3 Wu Zhiqiang;[D];中国海洋大学;2009年
4 Isra'a Abdul-Ameer Abdul-Jabbar(伊娜);[D];合肥工业大学;2014年
5 Dileep Kumar;基于小波分析和神经网络的供水管网管内泄漏声检测方法研究[D];浙江大学;2018年
6 陆智萍;稳定与不稳定长记忆随机过程分析:估计、应用及预测[D];华东师范大学;2010年
中国硕士学位论文全文数据库 前10条
1 王晶萍;抛物型方程的Wavelet-Galerkin方法[D];中国海洋大学;2006年
2 费斯(DAMOUS FATIH);用于监视与图像数据传输的无人机嵌入式系统研究[D];北京理工大学;2016年
3 周雪媛;基于偏微分的图像修复算法研究[D];成都理工大学;2011年
4 戎海栋;基于小波方法的紧急事件预测[D];天津大学;2005年
5 Isaac Armah Mensah;基于神经网络和小波变换的股票时间序列预测方法[D];中南大学;2010年
6 ARIES JEHAN TAMAMY;[D];华南理工大学;2016年
7 乔士(MWANI NTALE JULES);智能变压器在线监测及故障诊断技术研究[D];华南理工大学;2016年
8 武成同;基于声信号的风电机齿轮箱故障诊断研究[D];大连海事大学;2018年
9 王宁;时频分析法及其在地形变数据处理中的应用研究[D];中国地震局地震研究所;2014年
10 乐得福;利用现代技术测定地震信息的研究[D];华中科技大学;2009年
 快捷付款方式  订购知网充值卡  订购热线  帮助中心
  • 400-819-9993
  • 010-62982499
  • 010-62783978