小波域的盲源分离，可以有效地去除噪声，尤其是在胎儿心电提取方面-Wavelet domain blind source separation can effectively remove the noise, especially in regard to extraction of fetal ECG

it is used to remove noise from images

matlab方法去除高斯白噪声，比较全面，有效。很好用的代码(Matlab method to remove gaussian white noise, more comprehensive, effective. Very handy code)