CAJ | 학술논문

小波域阈值滤波方法因其实现最简单，计算量最小而得到广泛应用。多年来出现了大量的阈值确定方法。其中Donoho提出的通用阈值法是应用最广的阈值获取方法之一，但由于其阈值选取单一，通用性较差。结合小波域滤波方法中的又一主要分支：空域相关滤波算法中的优秀思想，从最基本的Lipschitz指数α的特性出发，对Donoho提出的通用阈值法进行改进提升，使得新通用阈值法能对低信噪比、高污染信号产生非常优异的滤波效果。
소파역역치려파방법인기실현최간단，계산량최소이득도엄범응용。다년래출현료대량적역치학정방법。기중Donoho제출적통용역치법시응용최엄적역치획취방법지일，단유우기역치선취단일，통용성교차。결합소파역려파방법중적우일주요분지：공역상관려파산법중적우수사상，종최기본적Lipschitz지수α적특성출발，대Donoho제출적통용역치법진행개진제승，사득신통용역치법능대저신조비、고오염신호산생비상우이적려파효과。
The wavelet threshold filtering method is widely used because of its simplest implementation and the minimum amount of calculation. Among the methods of threshold filtering,the general thresholding method proposed by Donoho is one of the most widely used method. But its single thresholding selection prevents its generality. Combined with the thoughts of the spatial correlation filters,the paper proposes a new method to improve Donoho′s general thresholding method,based on the most basic characteristics of the Lip-schitz index of alpha. The new-general de-noising method is excellent in filtering the high reject signals of low signal-to-noise ratio.