function?[xytc]=bdry_extract_3（V）;
%?[xytc]=bdry_extract_3（V）;
%?compute?（rtheta）?histograms?for?points?along?boundary?of?single?
%?region?in?binary?image?V?
%計算（r，θ）二值圖像中V沿單一區域的邊界點的直方

%?extract?a?set?of?boundary?points?w/oriented?tangents
%sig=1;
%Vg=gauss_sig（Vsig）;
Vg=V;?%?if?no?smoothing?is?needed
c=contourc（Vg[.5?.5]）;
[G1G2]=gradient（Vg）;

%?need?to?deal?with?multiple?contours?（for?objects?with?holes）
fz=c（1:）~=0.5;
c（:find（~fz））=NaN;
B=c（:find（fz））;

npts=size（B2）;%fan?hui?b?de?lieshu
t=zeros（npts1）;
for?n=1:npts
???x0=round（B（1n））;
???y0=round（B（2n））;
???t（n）=atan2（G2（y0x0）G1（y0x0））+pi/2;
end

x=B（1:）‘;
y=B（2:）‘;

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件??????68055??2014-02-28?16:11??sc_程序\111.jpg

?????文件??????65828??2014-03-21?13:24??sc_程序\2.jpg

?????文件????????705??2014-03-25?20:29??sc_程序\bdry_extract_3.asv

?????文件????????705??2014-03-25?20:34??sc_程序\bdry_extract_3.m

?????文件????????659??2000-09-05?08:28??sc_程序\bookstein.m

?????文件???????5988??2014-03-24?11:13??sc_程序\demo3.m

?????文件???????1235??2014-02-28?15:10??sc_程序\demo_1.asv

?????文件???????1207??2014-02-28?15:16??sc_程序\demo_1.m

?????文件??????10645??2014-04-02?22:19??sc_程序\demo_2.asv

?????文件??????10645??2014-04-07?21:59??sc_程序\demo_2.m

?????文件?????627576??2000-09-05?12:08??sc_程序\digit_100_train_easy.mat

?????文件??????50587??2014-03-24?10:56??sc_程序\digit_100_train_easy1.mat

?????文件?????627576??2000-09-05?12:08??sc_程序\digit_100_train_hard.mat

?????文件????????820??2000-09-05?08:26??sc_程序\dist2.m

?????文件????????115??2000-09-05?11:26??sc_程序\gaussker.m

?????文件????????577??2000-09-05?11:26??sc_程序\get_samples_1.m

?????文件???????1541??2014-02-28?17:12??sc_程序\hh.asv

?????文件???????1540??2014-02-28?17:26??sc_程序\hh.m

?????文件????????484??2014-04-01?12:19??sc_程序\hist_cost_2.asv

?????文件????????477??2014-03-23?19:08??sc_程序\hist_cost_2.m

?????文件??????11427??2014-04-02?17:16??sc_程序\hungarian.asv

?????文件??????11427??2014-04-02?17:19??sc_程序\hungarian.m

?????文件????????335??2000-09-05?11:26??sc_程序\im.m

?????文件?????352854??2013-10-30?12:39??sc_程序\nir.bmp

?????文件???????6966??2014-03-24?11:08??sc_程序\picout1.jpg

?????文件????????874??2000-09-06?03:25??sc_程序\README

?????文件???????7288??2000-09-05?12:28??sc_程序\save_fish_def_3_1.mat

?????文件???????7288??2000-09-05?12:28??sc_程序\save_fish_noise_3_2.mat

?????文件???????8856??2000-09-05?12:28??sc_程序\save_fish_outlier_3_2.mat

?????文件???????1241??2014-02-27?14:25??sc_程序\sccc.m

............此處省略59個文件信息