小波收缩策略的广义分数幂模型

摘要

The generalized fractional power models for selecting threshold values are analysed in wavelet denoising approaches. Criteria and algorithms for selecting optimal threshold value are derived through analysing several well-known shrinkage and thresholding polices and use them in the scalar signal' denoising. The simulation shows that these criteria are useful in the common sense.%作者分析了几种常用的小波去噪收缩策略问题，经归纳提出了小波去噪收缩策略的广义分数幂模型，给出了具体选择最优收缩策略的算法与快速算法，并把它应用于样例信号的去噪处理。然后结合交叉验证方法和通用阈值方法等进行仿真试验，证明分数幂模型有更好的滤波效果。