function?Y?=?coldfilt（X?ha?hb）

%?function?Y?=?coldfilt（X?ha?hb）
%?Filter?the?columns?of?image?X?using?the?two?filters?ha?and?hb?=?reverse（ha）.
%?ha?operates?on?the?odd?samples?of?X?and?hb?on?the?even?samples.
%?Both?filters?should?be?even?length?and?h?should?be?approx?linear?phase?with
%?a?quarter?sample?advance?from?its?mid?pt?（ie?|h（m/2）|?>?|h（m/2?+?1）|）.
%
%???????????????????ext????????top?edge?????????????????????bottom?edge???????ext
%?Level?1:????????!???????????????|???????????????!???????????????|???????????????!
%?odd?filt?on?.????b???b???b???b???a???a???a???a???a???a???a???a???b???b???b???b???
%?odd?filt?on?.??????a???a???a???a???b???b???b???b???b???b???b???b???a???a???a???a
%?Level?2:????????!???????????????|???????????????!???????????????|???????????????!
%?+q?filt?on?x??????b???????b???????a???????a???????a???????a???????b???????b???????
%?-q?filt?on?o??????????a???????a???????b???????b???????b???????b???????a???????a
%
%?The?output?is?decimated?by?two?from?the?input?sample?rate?and?the?results
%?from?the?two?filters?Ya?and?Yb?are?interleaved?to?give?Y.
%?Symmetric?extension?with?repeated?end?samples?is?used?on?the?composite?X
%?columns?before?each?filter?is?applied.
%
%?Cian?Shaffrey?Nick?Kingsbury
%?Cambridge?University?August?2000

[rc]?=?size（X）;
if?rem（r4）?>?0?error（‘No.?of?rows?in?X?must?be?a?multiple?of?4!‘）;?end
m?=?length（ha）;
if?m?~=?length（hb）?error（‘Lengths?of?ha?and?hb?must?be?the?same!‘）;?end
if?rem（m2）?>?0?error（‘Lengths?of?ha?and?hb?must?be?even!‘）;?end
m2?=?fix（m/2）;

%?Set?up?vector?for?symmetric?extension?of?X?with?repeated?end?samples.
xe?=?reflect（[（1-m）:（r+m）]?0.5?r+0.5）;?%?Use?‘reflect‘?so?d?
%?Select?odd?and?even?samples?from?ha?and?hb.
hao?=?ha（1:2:m）;
hae?=?ha（2:2:m）;
hbo?=?hb（1:2:m）;
hbe?=?hb（2:2:m）;
t?=?[6:4:（r+2*m-2）];

r2?=?r/2;
Y?=?zeros（r2c）;
if?sum（ha.*hb）?>?0
???s1?=?1:2:r2;?
???s2?=?s1?+?1;
else
???s2?=?1:2:r2;?
???s1?=?s2?+?1;
end

%?Perform?filtering?on?columns?of?extended?matrix?X（xe:）?in?4?ways.?
Y（s1:）?=?conv2（X（xe（t-1）:）hao（:）‘valid‘）?+?conv2（X（xe（t-3）:）hae（:）‘valid‘）;
Y（s2:）?=?conv2（X（xe（t）:）hbo（:）‘valid‘）?+?conv2（X（xe（t-2）:）hbe（:）‘valid‘）;

return

?屬性????????????大小?????日期????時(shí)間???名稱(chēng)
-----------?---------??----------?-----??----

?????文件???????1216??2001-02-08?12:00??dt_cwt?texture\qshift_a.mat

?????文件???????1472??2001-02-08?12:00??dt_cwt?texture\qshift_b.mat

?????文件???????1600??2001-02-08?12:00??dt_cwt?texture\qshift_c.mat

?????文件???????1728??2001-02-08?12:00??dt_cwt?texture\qshift_d.mat

?????文件????????813??2001-02-08?12:00??dt_cwt?texture\reflect.m

?????文件???????7043??2007-08-19?09:38??dt_cwt?texture\22.jpg

?????文件????????192??2007-09-22?18:48??dt_cwt?texture\RGB2YUV.m

?????文件????????112??2007-09-22?09:34??dt_cwt?texture\test_dtcwt.m

?????文件????????517??2007-09-25?17:36??dt_cwt?texture\TextureDTCWT.m

?????文件???????1397??2007-09-26?09:11??dt_cwt?texture\LoadImageTexture.asv

?????文件???????1613??2007-09-26?15:50??dt_cwt?texture\LoadImageTexture.m

?????文件???????1410??2007-09-26?09:51??dt_cwt?texture\OpenDatabaseTexture.asv

?????文件???????1583??2007-09-26?15:49??dt_cwt?texture\OpenDatabaseTexture.m

?????文件????????241??2007-09-26?10:16??dt_cwt?texture\SearchTexture.asv

?????文件???????5346??2007-09-26?15:48??dt_cwt?texture\SearchTexture.m

?????文件????????517??2007-09-25?17:35??dt_cwt?texture\TextureDTCWT.asv

?????文件????????608??2000-09-28?16:13??dt_cwt?texture\antonini.mat

?????文件???????2244??2001-02-08?11:58??dt_cwt?texture\coldfilt.m

?????文件????????919??2003-03-19?07:59??dt_cwt?texture\colfilter.m

?????文件???????6597??2002-05-13?17:20??dt_cwt?texture\dtwavexfm2.m

?????文件???????9700??2007-09-26?10:01??dt_cwt?texture\ImageSearch.asv

?????文件??????31650??2007-09-23?16:25??dt_cwt?texture\ImageSearch.fig

?????文件???????5284??2007-09-26?10:30??dt_cwt?texture\ImageSearch.m

?????文件????????480??2001-02-08?11:58??dt_cwt?texture\legall.mat

?????文件??????77847??2001-02-08?11:58??dt_cwt?texture\lenna.mat

?????文件????????544??2000-09-28?16:13??dt_cwt?texture\near_sym_a.mat

?????文件????????864??2000-09-28?16:13??dt_cwt?texture\near_sym_b.mat

?????文件???????2169??2007-09-23?15:23??dt_cwt?texture\OpenDatabase.asv

?????文件???????1216??2001-02-03?08:43??dt_cwt?texture\qshift_06.mat

?????文件???????2728??2005-07-11?17:50??dt_cwt?texture\qshift_32.mat

............此處省略52個(gè)文件信息