摘要
在多分辨分析小波阈值去噪方法的基础上,介绍了一种基于插值思想的双参数阈值函数。该阈值函数既克服了硬阈值函数不连续的缺点,又修正了软阈值函数存在的恒定偏差。仿真实验的结果表明,去噪效果得到了改善。
Based on the multi-analysis wavelet threshold denoising method,using the notion of interpolation, introduces a new threshold function with two ancillary variable. It overcame the shortcoming of the hardthreshold function's discontinuousness and improves the constant error. Numerical simulation results indicate the denoising effects are improved.
出处
《现代计算机》
2008年第9期60-62,92,共4页
Modern Computer
关键词
小波闽值去噪
阈值函数
信噪比
均方误差
Wavelet Threshold Shrinkage
Threshold Function
MSE(Mean Square Error)
SNR(SignalNoise Ratio)