数字技术与应用Issue(9)：43-45,3.
基于一种新阈值函数的小波阈值去噪方法研究
A De-noising Algorithm of Wavelet Threshold Based on a New Threshold Function
王京港 1黄雨青1
作者信息
- 1. 南京理工大学紫金学院 江苏南京 210046
- 折叠
摘要
Abstract
Based on the study of the disadvantages of the traditional threshold function-the hard threshold function and the soft threshold function, which is proposed by D.L.Dohono, we propose a new threshold function. It overcame the shortcoming of the hard threshold with discontinuous function and solved the problem of the permanent bias in soft threshold function. Simulation result indicates that the new threshold function is effective in removing white noise, gives better Mean Square Error (MSE) performance and Signal-Noise-Ratio (SNR) than the soft or hard threshold methods and the trade-off threshold method. Besides, the denoised signals using the new function also follow the original signal very closely;this ful y embodies the advantage of the wavelet threshold denoising method.关键词
小波去噪/阈值函数/信噪比/均方误差Key words
wavelet de-noising/threshold function/SNR/MSE分类
信息技术与安全科学引用本文复制引用
王京港,黄雨青..基于一种新阈值函数的小波阈值去噪方法研究[J].数字技术与应用,2012,(9):43-45,3.
