%?BFILTER2gray?Two?dimensional?bilateral?filtering?for?grayscale?images.
%????This?function?implements?2-D?bilateral?filtering?using
%????the?method?outlined?in:
%
%???????C.?Tomasi?and?R.?Manduchi.?Bilateral?Filtering?for?
%???????Gray?and?Color?Images.?In?Proceedings?of?the?IEEE?
%???????International?Conference?on?Computer?Vision?1998.?
%
%????B?=?bfilter2（AWSIGMA）?performs?2-D?bilateral?filtering
%????for?the?grayscale?or?color?image?A.?A?should?be?a?double
%????precision?matrix?of?size?NxMx1?or?NxMx3?（i.e.?grayscale
%????or?color?images?respectively）?with?normalized?values?in
%????the?closed?interval?[01].?The?half-size?of?the?Gaussian
%????bilateral?filter?window?is?defined?by?W.?The?standard
%????deviations?of?the?bilateral?filter?are?given?by?SIGMA
%????where?the?spatial-domain?standard?deviation?is?given?by
%????SIGMA（1）?and?the?intensity-domain?standard?deviation?is
%????given?by?SIGMA（2）.
%
%?Douglas?R.?Lanman?Brown?University?September?2006.
%?dlanman@brown.edu?http://mesh.brown.edu/dlanman
%
%?2009-02-20?jens.krommweh（at）uni-due.de

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%?Pre-process?input?and?select?appropriate?filter.
function?B?=?bfilter2gray（Awsigma）

%?Verify?that?the?input?image?exists?and?is?valid.
if?~exist（‘A‘‘var‘）?||?isempty（A）
???error（‘Input?image?A?is?undefined?or?invalid.‘）;
end
if?~isfloat（A）?||?~sum（[13]?==?size（A3））?||?...
??????min（A（:））??1
???error（[‘Input?image?A?must?be?a?double?precision?‘...
??????????‘matrix?of?size?NxMx1?on?the?closed?interval?[01].‘]）;??????
end

%?Verify?bilateral?filter?window?size.
if?~exist（‘w‘‘var‘）?||?isempty（w）?||?...
??????numel（w）?~=?1?||?w????w?=?1;
end
w?=?ceil（w）;

%?Verify?bilateral?filter?standard?deviations.
if?~exist（‘sigma‘‘var‘）?||?isempty（sigma）?||?...
??????numel（sigma）?~=?2?||?sigma（1）?<=?0?||?sigma（2）?<=?0
???sigma?=?[3?0.1];
end


%?Apply?grayscale?bilateral?filtering.
sigma_d?=?sigma（1）;
sigma_r?=?sigma（2）;

%?Pre-compute?Gaussian?distance?weights.
[XY]?=?meshgrid（-w:w-w:w）;
G?=?exp（-（X.^2+Y.^2）/（2*sigma_d^2））;

%?Apply?bilateral?filter.
dim?=?size（A）;
B?=?zeros（dim）;
for?i?=?1:dim（1）
???for?j?=?1:dim（2）
??????
?????????%?Extract?local?region.
?????????iMin?=?max（i-w1）;
?????????iMax?=?min（i+wdim（1））;
?????????jMin?=?max（j-w1）;
?????????jMax?=?min（j+wdim（2））;
?????????I?=?A（iMin:iMaxjMin:jMax）;
??????
?????????%?Compute?Gaussian?intensity?weights.
?????????H?=?exp（-（I-A（ij））.^2/（2*sigma_r^2））;
??????
?????????%?Calculate?bilateral?filter?response.
?????????F?=?H.*G（（iMin:iMax）-i+w+1（jMin:jMax）-j+w+1）;
?????????B（ij）?=?sum（F（:）.*I（:））/sum（F（:））;
???????????????
???end
end

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2014-10-01?20:51??Tetrolet_Transform\
?????文件????????6148??2009-10-05?14:38??Tetrolet_Transform\.DS_Store
?????文件????????2752??2009-02-20?03:55??Tetrolet_Transform\bfilter2gray.m
?????文件?????????454??2009-02-19?07:21??Tetrolet_Transform\cost_wave.m
?????文件?????????296??2008-12-19?22:51??Tetrolet_Transform\cover.mat
?????文件????????1077??2009-02-19?10:07??Tetrolet_Transform\create_matrices_tetro.m
?????文件????????3816??2012-03-08?22:55??Tetrolet_Transform\decdemo.m
?????文件????????2348??2012-03-20?15:15??Tetrolet_Transform\dec_tetro.m
?????文件????????3097??2009-10-01?13:40??Tetrolet_Transform\dec_tetro_coeff.m
?????文件????????2578??2009-09-30?15:04??Tetrolet_Transform\dec_tetro_edge.m
?????文件????????2169??2009-09-30?15:07??Tetrolet_Transform\dec_tetro_rel.m
?????文件????????2604??2009-09-30?15:24??Tetrolet_Transform\dec_tetro_rel_edge.m
?????文件????????1479??2014-03-08?18:37??Tetrolet_Transform\demo_tetro.m
?????文件????????6659??2014-03-28?08:50??Tetrolet_Transform\demo_tetro1.m
?????文件?????????519??2009-09-30?13:38??Tetrolet_Transform\edge_det.m
?????文件?????????544??2009-02-19?06:49??Tetrolet_Transform\entr.m
?????文件?????????890??2014-04-02?22:09??Tetrolet_Transform\fusion_tetro.m
?????文件????????1558??2012-03-02?22:04??Tetrolet_Transform\init_tetro.asv
?????文件????????1558??2012-03-02?22:04??Tetrolet_Transform\init_tetro.m
?????文件???????59325??2008-04-23?13:33??Tetrolet_Transform\lena256.png
?????文件????????9242??2009-02-19?09:49??Tetrolet_Transform\mat117.mat
?????文件?????????748??2009-02-19?10:07??Tetrolet_Transform\mat117P.mat
?????文件????????1192??2009-02-19?09:50??Tetrolet_Transform\mat16.mat
?????文件?????????298??2009-02-19?10:06??Tetrolet_Transform\mat16P.mat
?????文件????????1938??2009-02-19?09:50??Tetrolet_Transform\mat32.mat
?????文件?????????351??2009-02-19?10:07??Tetrolet_Transform\mat32P.mat
?????文件????????4137??2009-02-19?09:50??Tetrolet_Transform\mat64.mat
?????文件?????????506??2009-02-19?10:07??Tetrolet_Transform\mat64P.mat
?????文件?????????892??2009-09-30?13:08??Tetrolet_Transform\opt_wave10.m
?????文件????????1065??2009-10-05?14:48??Tetrolet_Transform\opt_wave10rel.m
?????文件?????????343??2009-03-20?11:53??Tetrolet_Transform\psnr.m
............此處省略8個文件信息