function?[xthresh]=BayesThresh2（y）
%
%%%%%%%%%%%%%%%It‘s?my?own?function!!!!!
%
%y?--??2-d?wavelet?coefficient

sigma=1;%噪聲方差已歸一化為1
n=length（y）;
sigmaY2=sum（sum（y.^2））/n/n;%帶噪聲信號方差
temp=sigmaY2-sigma^2;
if?temp>0
????sigma_xNoiseless=sqrt（temp）;%不帶噪聲信號方差估計
????thresh=sigma^2/sigma_xNoiseless;
else
????thresh=max（max（abs（y）））;
end;

x??????=?SoftThresh（ythresh）;????

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件????????728??2003-10-23?16:51??MultiVisu2.m

?????文件????????654??2003-10-23?16:58??VisuThresh2.m

?????文件????????573??2006-01-03?13:20??SoftThresh.m

?????文件????????412??2003-10-23?21:12??BayesThresh2.m

?????文件????????684??2003-10-23?20:56??MultiBayes2.m

-----------?---------??----------?-----??----

?????????????????3051????????????????????5