function?y?=?conv2c（xh）
%?Circular?2D?convolution
x=wraparound（xh）;
y=conv2（xh‘valid‘）;


function?y?=?wraparound（x?m）
%?Extend?x?so?as?to?wrap?around?on?both?axes?sufficient?to?allow?a
%?“valid“?convolution?with?m?to?return?the?cyclical?convolution.
%?We?assume?mask?origin?near?centre?of?mask?for?compatibility?with
%?“same“?option.
[mx?nx]?=?size（x）;
[mm?nm]?=?size（m）;
if?mm?>?mx?|?nm?>?nx
????error（‘Mask?does?not?fit?inside?array‘）
end

mo?=?floor（（1+mm）/2）;?no?=?floor（（1+nm）/2）;??%?reflected?mask?origin
ml?=?mo-1;????????????nl?=?no-1;?????????????%?mask?left/above?origin
mr?=?mm-mo;???????????nr?=?nm-no;????????????%?mask?right/below?origin
me?=?mx-ml+1;?????????ne?=?nx-nl+1;??????????%?reflected?margin?in?input
mt?=?mx+ml;???????????nt?=?nx+nl;????????????%?top?of?image?in?output
my?=?mx+mm-1;?????????ny?=?nx+nm-1;??????????%?output?size

y?=?zeros（my?ny）;
y（mo:mt?no:nt）?=?x;??????%?central?region
if?ml?>?0
????y（1:ml?no:nt）?=?x（me:mx?:）;???????????????????%?top?side
????if?nl?>?0
????????y（1:ml?1:nl）?=?x（me:mx?ne:nx）;????????????%?top?left?corner
????end
????if?nr?>?0
????????y（1:ml?nt+1:ny）?=?x（me:mx?1:nr）;??????????%?top?right?corner
????end
end
if?mr?>?0
????y（mt+1:my?no:nt）?=?x（1:mr?:）;?????????????????%?bottom?side
????if?nl?>?0
????????y（mt+1:my?1:nl）?=?x（1:mr?ne:nx）;??????????%?bottom?left?corner
????end
????if?nr?>?0
????????y（mt+1:my?nt+1:ny）?=?x（1:mr?1:nr）;????????%?bottom?right?corner
????end
end
if?nl?>?0
????y（mo:mt?1:nl）?=?x（:?ne:nx）;???????????????????%?left?side
end
if?nr?>?0
????y（mo:mt?nt+1:ny）?=?x（:?1:nr）;?????????????????%?right?side
end

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件??????????52??2007-11-09?00:31??diffh.m
?????文件??????????53??2007-11-09?00:31??diffv.m
?????文件??????199356??2008-10-22?16:59??digitalcamerapicture2.jpg
?????文件?????????474??2008-06-04?10:19??mycalltoTVnew.m
?????文件?????????246??2008-10-22?16:13??mywl.mat
?????文件????????1276??2008-06-04?08:46??projk.m
?????文件????????1294??2008-10-29?16:12??README.txt
?????文件?????????355??2009-06-02?13:14??Rfuntwist.m
?????文件?????????165??2009-06-02?13:13??RTfuntwist.m
?????文件????????2276??2009-06-02?13:20??RUNME.m
?????文件?????????200??2008-06-19?16:08??shiftCube.m
?????文件??????308278??2008-06-09?14:26??staticscene1x150.BMP
?????文件??????308278??2008-06-09?14:36??staticscenex150xdark.BMP
?????文件?????????143??2008-06-04?10:17??TVnormspectralimaging.m
?????文件???????22767??2009-06-02?13:01??TwISTmod.m
?????文件???????98708??2008-01-15?21:41??datacubeplotter\colorMatchFcn.m
?????文件?????????271??2008-06-27?13:59??datacubeplotter\datacubeplottingTest.m
?????文件?????????312??2009-06-02?13:20??datacubeplotter\dispCube.m
?????文件????????1090??2008-06-27?13:57??datacubeplotter\imagedatacube2.m
?????文件????????1095??2008-08-06?09:45??datacubeplotter\imagedatacube2gray.m
?????文件?????????586??2008-01-15?21:40??datacubeplotter\ind2rgb8.m
?????文件????????9832??2008-01-15?21:40??datacubeplotter\ind2rgb8c.c
?????文件???????11430??2008-02-24?14:19??datacubeplotter\ind2rgb8c.mexa64
?????文件????????1530??2008-01-15?21:41??datacubeplotter\spectrumRGB.m
?????文件????????7649??2008-01-15?21:40??datacubeplotter\subimage2.m
?????文件????????6137??2008-06-13?11:50??datacubeplotter\subplot1.m
?????目錄???????????0??2009-06-02?13:14??datacubeplotter\
?????文件????????1666??2007-07-31?14:37??conv2c.m
?????文件????20402793??2008-07-01?16:50??Cu10x1x1x1.mat