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(shí)間???名稱(chēng)
-----------?---------??----------?-----??----

????.......??????2390??2008-03-14?21:21??Contourlet\ChangeLog

????.......??????5127??2008-03-14?21:21??Contourlet\computescale.m

????.......??????3537??2008-03-14?21:21??Contourlet\Contents.m

????.......???????706??2008-03-14?21:21??Contourlet\COPYING

?????文件???????2547??2008-07-13?22:17??Contourlet\denoisedemo.m

????.......??????2223??2008-03-14?21:21??Contourlet\dfbdec.m

?????文件???????1785??2008-07-13?22:29??Contourlet\dfbdec_l.m

????.......??????1748??2008-03-14?21:21??Contourlet\dfbimage.m

????.......??????2012??2008-03-14?21:21??Contourlet\dfbrec.m

????.......??????1736??2008-03-14?21:21??Contourlet\dfbrec_l.m

????.......??????2729??2008-03-14?21:21??Contourlet\dfilters.m

????.......???????755??2008-03-14?21:21??Contourlet\dup.m

????.......??????1103??2008-03-14?21:21??Contourlet\efilter2.m

?????文件???????1862??2008-07-13?22:41??Contourlet\extend2.m

????.......??????2098??2008-03-14?21:21??Contourlet\fbdec.m

????.......??????1507??2008-03-14?21:21??Contourlet\fbdec_l.m

????.......??????2360??2008-03-14?21:21??Contourlet\fbrec.m

????.......??????1426??2008-03-14?21:21??Contourlet\fbrec_l.m

????.......???????485??2008-03-14?21:21??Contourlet\ffilters.m

????.......???????856??2008-03-14?21:21??Contourlet\ld2quin.m

????.......???????662??2008-03-14?21:21??Contourlet\ldfilter.m

????.......???????722??2008-03-14?21:21??Contourlet\lpdec.m

????.......???????935??2008-03-14?21:21??Contourlet\lprec.m

????.......???????882??2008-03-14?21:21??Contourlet\mctrans.m

????.......???????775??2008-03-14?21:21??Contourlet\modulate2.m

????.......??????1254??2008-03-14?21:21??Contourlet\pdfb2vec.m

????.......???????931??2008-03-14?21:21??Contourlet\pdfb_nest.m

????.......??????1254??2008-03-14?21:21??Contourlet\pdfb_tr.m

?????文件???????2692??2008-07-13?22:27??Contourlet\pdfbdec.m

????.......??????1486??2008-03-14?21:21??Contourlet\pdfbrec.m

............此處省略42個(gè)文件信息