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????

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2016-12-19?14:37??SAR-denosing-sj\
?????文件????????1119??2016-12-17?15:14??SAR-denosing-sj\backsamp.m
?????文件???????66616??2012-05-04?10:05??SAR-denosing-sj\BJ256_N_5.bmp
?????文件?????????487??2016-12-18?21:17??SAR-denosing-sj\covriance.m
?????文件????????5884??2016-12-19?14:37??SAR-denosing-sj\denoising.m
?????文件????????1768??2016-12-16?23:39??SAR-denosing-sj\dfbdec_l.m
?????文件????????2012??2016-12-17?15:31??SAR-denosing-sj\dfbrec.m
?????文件????????1736??2016-12-17?15:32??SAR-denosing-sj\dfbrec_l.m
?????文件?????????755??2016-12-17?15:37??SAR-denosing-sj\dup.m
?????文件????????1861??2016-12-17?15:08??SAR-denosing-sj\extend2.m
?????文件????????1507??2016-12-17?15:08??SAR-denosing-sj\fbdec_l.m
?????文件????????1426??2016-12-17?15:34??SAR-denosing-sj\fbrec_l.m
?????文件?????????662??2016-12-16?23:09??SAR-denosing-sj\ldfilter.m
?????文件?????????722??2016-12-17?15:06??SAR-denosing-sj\lpdec.m
?????文件?????????935??2016-12-17?15:36??SAR-denosing-sj\lprec.m
?????文件????????1254??2016-12-16?23:15??SAR-denosing-sj\pdfb2vec.m
?????文件????????2671??2016-12-16?23:04??SAR-denosing-sj\pdfbdec.m
?????文件????????1486??2016-12-16?23:20??SAR-denosing-sj\pdfbrec.m
?????文件?????????931??2016-12-17?15:17??SAR-denosing-sj\pdfb_nest.m
?????文件????????2230??2016-12-18?00:24??SAR-denosing-sj\pdfb_nest1.m
?????文件????????1667??2016-12-16?23:08??SAR-denosing-sj\pfilters.m
?????文件????????1374??2016-12-17?15:13??SAR-denosing-sj\ppdec.m
?????文件????????1497??2016-12-17?15:35??SAR-denosing-sj\pprec.m
?????文件?????????459??2016-12-11?22:50??SAR-denosing-sj\PSNR.m
?????文件????????1490??2016-12-17?15:09??SAR-denosing-sj\qpdec.m
?????文件????????1656??2016-12-17?15:36??SAR-denosing-sj\qprec.m
?????文件????????1172??2016-12-17?15:32??SAR-denosing-sj\rebacksamp.m
?????文件????????1268??2016-12-17?15:09??SAR-denosing-sj\resamp.m
?????文件????????2255??2016-12-17?15:10??SAR-denosing-sj\resampc.c
?????文件????????7168??2016-12-17?15:10??SAR-denosing-sj\resampc.dll
?????文件????????9216??2016-12-17?15:13??SAR-denosing-sj\resampc.mexw64
............此處省略4個文件信息