????
%----------------------------------------------
%向下采樣
function?r=DownSample（im）
????[mnz]=size（im）;
????r=zeros（m/2n/2z）;
????for?i=1:m/2
????????for?j=1:n/2
????????????r（ij:）=im（2*i2*j:）;
????????end
????end
end

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

?????文件????????241??2011-08-11?14:46??DownSample.m

?????文件????????726??2011-08-16?09:52??guass_smooth.m

?????文件????????927??2011-08-11?14:46??Guassion.m

?????文件????????483??2011-08-11?14:46??GuassionMatrix.m

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

?????????????????2377????????????????????4