摘要
在多分辨分析小波阈值去噪方法的基础上[3],用一种改进的阈值函数和自适应阈值选取算法相结合的方法,克服了硬阈值法不连续性和软阈值法有偏差的缺点。该方法能自动跟踪噪声,不同尺度自适应采用不同的阈值,可有效去除每一尺度上的噪声,保留有用信号,提高信噪比。仿真实验和地震资料处理结果表明,该方法去噪效果明显,可在各类消除随机噪声的信号处理中发挥作用。
Based on the Multi-analysis wavelet threshold method which put forward by D.L.Donoho and I.M.Johnstone,a method integrated with an algorithm of the adaptive threshold selection,is used to overcome the shortcoming of discontinuity of Hard-threshold method and dispersion of the Soft-threshold method.This method can track the noise automatically,adopt the different adaptive threshold in different scale,get rid of a great deal noise in every scale,save useful signals,and further to improve the signal-noise-ratio.Simulation experiments and the results of seismic data processing show the method can get obvious denoising effect,and make it possible to embody the function in all sorts of signal processing of eliminating random noise.
出处
《物探化探计算技术》
CAS
CSCD
2006年第2期173-177,共5页
Computing Techniques For Geophysical and Geochemical Exploration
