摘要
小波变换在信号滤波去噪方面得到广泛运用。本文在小波阈值函数去噪原理的基础上,对传统的软、硬阈值函数方法和Garrote函数阈值方法进行分析,提出一种基于Garrote函数的改进型阈值函数。Matlab仿真实验表明,新的改进型阈值函数去噪效果优于传统方法。
Based on the method of wavelet threshold denoising, the procession of wavelet threshold denoising is introduced, and the traditional soft, hard and Garrote threshold function are analysed. In order to overcome the shortcoming of the traditional threshold function, a new modified threshold function is proposed. The results of experimental simulation indicate that the modi- fied denoising method performs effectively and remarkable, which is better than the traditional functions.
出处
《计算机与现代化》
2014年第3期219-222,共4页
Computer and Modernization
关键词
小波去噪
阈值函数
信噪比
wavelet denoising
threshold function
SNR
