摘要
阈值去噪的方法就是在小波分解后的各层系数中,对模大于或小于某阈值T的系数分别处理,然后对处理完的小波系数再反变换重构出经去噪后的信号。在阈值去噪中,阈值函数体现了对超过和低于阈值的小波系数模的不同的处理策略以及不同的估计方法。
The method of threshold denoising is on each level of coefficient which after wavelet analysis, based on processing the modulus coefficient that is more or less than some threshold T separately, then counter-transform and reconstruct the wavelet coefficient into denoisied signal. On method of threshold denoising, threshold function expresses the different stratagems and estimated methods that are more or less than thresholds wavelet coefficient modules.
出处
《现代计算机》
2007年第5期26-28,52,共4页
Modern Computer
关键词
小波变换
去噪
阈值
信号
Wavelet Transform
Denoising
Treshold
Signal
