function?y?=?backsamp（y）
%?BACKSAMP????Backsampling?the?subband?images?of?the?directional?filter?bank
%
%???y?=?backsamp（y）
%
%?Input?and?output?are?cell?vector?of?dyadic?length
%
%?This?function?is?called?at?the?end?of?the?DFBDEC?to?obtain?subband?images?
%?with?overall?sampling?as?diagonal?matrices
%
%?See?also:?DFBDEC

%?Number?of?decomposition?tree?levels
n?=?log2（length（y））;

if?（n?~=?round（n））?|?（n?????error（‘Input?must?be?a?cell?vector?of?dyadic?length‘）;
end

if?n?==?1
????%?One?level?the?decomposition?filterbank?shoud?be?Q1r
????%?Undo?the?last?resampling?（Q1r?=?R2?*?D1?*?R3）
????for?k?=?1:2
	y{k}?=?resamp（y{k}?4）;
	y{k}（:?1:2:end）?=?resamp（y{k}（:?1:2:end）?1）;
	y{k}（:?2:2:end）?=?resamp（y{k}（:?2:2:end）?1）;	
????end????
????
elseif?n?>?2????
????N?=?2^（n-1）;
????
????for?k?=?1:2^（n-2）
	shift?=?2*k?-?（2^（n-2）?+?1）;
	
	%?The?first?half?channels
	y{2*k-1}?=?resamp（y{2*k-1}?3?shift）;
	y{2*k}?=?resamp（y{2*k}?3?shift）;
	
	%?The?second?half?channels
	y{2*k-1+N}?=?resamp（y{2*k-1+N}?1?shift）;
	y{2*k+N}?=?resamp（y{2*k+N}?1?shift）;	
????end
end

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

?????文件?????263222??2002-08-03?21:31??contourlet\lena.bmp

?????文件?????177851??2003-11-10?11:45??contourlet\barbara.png

?????文件?????160674??2003-11-11?10:27??contourlet\peppers.png

?????文件??????52332??2003-11-06?22:15??contourlet\zoneplate.png

?????文件???????7168??2003-04-10?10:30??contourlet\resampc.dll

?????文件???????1119??2003-09-10?23:32??contourlet\backsamp.m

?????文件???????5127??2003-11-05?00:10??contourlet\computescale.m

?????文件???????3537??2003-11-11?10:45??contourlet\Contents.m

?????文件???????3437??2003-11-10?12:22??contourlet\decdemo.m

?????文件???????2472??2003-11-13?00:17??contourlet\denoisedemo.m

?????文件???????2223??2003-11-05?22:44??contourlet\dfbdec.m

?????文件???????1768??2003-11-05?23:54??contourlet\dfbdec_l.m

?????文件???????1748??2003-11-05?08:11??contourlet\dfbimage.m

?????文件???????2012??2003-11-10?00:52??contourlet\dfbrec.m

?????文件???????1736??2003-11-06?00:18??contourlet\dfbrec_l.m

?????文件???????2729??2003-11-06?10:39??contourlet\dfilters.m

?????文件????????755??2003-04-10?10:30??contourlet\dup.m

?????文件???????1103??2003-04-10?10:30??contourlet\efilter2.m

?????文件???????1861??2003-11-05?22:25??contourlet\extend2.m

?????文件???????2098??2003-04-10?10:30??contourlet\fbdec.m

?????文件???????1507??2003-11-06?10:41??contourlet\fbdec_l.m

?????文件???????2360??2003-04-10?10:30??contourlet\fbrec.m

?????文件???????1426??2003-11-06?00:23??contourlet\fbrec_l.m

?????文件????????485??2003-04-10?10:30??contourlet\ffilters.m

?????文件????????856??2003-04-10?10:30??contourlet\ld2quin.m

?????文件????????662??2003-11-05?08:17??contourlet\ldfilter.m

?????文件????????722??2003-09-13?02:30??contourlet\lpdec.m

?????文件????????935??2003-09-13?02:48??contourlet\lprec.m

?????文件????????882??2003-11-05?08:19??contourlet\mctrans.m

?????文件????????775??2003-04-10?10:30??contourlet\modulate2.m

............此處省略36個文件信息