function?[coutmarked_img]=corner（varargin）
%???CORNER?Find?corners?in?intensity?image.?
%???????CORNER?works?by?the?following?step:
%???????1.	Apply?the?Canny?edge?detector?to?the?gray?level?image?and?obtain?a
%???????binary?edge-map.
%???????2.	Extract?the?edge?contours?from?the?edge-map?fill?the?gaps?in?the
%???????contours.
%???????3.	Compute?curvature?at?a?low?scale?for?each?contour?to?retain?all
%???????true?corners.
%???????4.	All?of?the?curvature?local?maxima?are?considered?as?corner
%???????candidates?then?rounded?corners?and?false?corners?due?to?boundary
%???????noise?and?details?were?eliminated.
%???????5.??End?points?of?line?mode?curve?were?added?as?corner?if?they?are?not
%???????close?to?the?above?detected?corners.
%
%???????Syntax?:????
%???????[coutmarked_img]=corner（ICT_anglesigHLEndpiontGap_size）
%
%???????Input?:
%???????I?-??the?input?image?it?could?be?gray?color?or?binary?image.?If?I?is
%???????????empty（[]）?input?image?can?be?get?from?a?open?file?dialog?box.
%???????C?-??denotes?the?minimum?ratio?of?major?axis?to?minor?axis?of?an?ellipse?
%???????????whose?vertex?could?be?detected?as?a?corner?by?proposed?detector.??
%???????????The?default?value?is?1.5.
%???????T_angle?-??denotes?the?maximum?obtuse?angle?that?a?corner?can?have?when?
%???????????it?is?detected?as?a?true?corner?default?value?is?162.
%???????Sig?-??denotes?the?standard?deviation?of?the?Gaussian?filter?when
%???????????computeing?curvature.?The?default?sig?is?3.
%???????HL?-??high?and?low?threshold?of?Canny?edge?detector.?The?default?value
%???????????is?0.35?and?0.
%???????Endpoint?-??a?flag?to?control?whether?add?the?end?points?of?a?curve
%???????????as?corner?1?means?Yes?and?0?means?No.?The?default?value?is?1.
%???????Gap_size?-??a?paremeter?use?to?fill?the?gaps?in?the?contours?the?gap
%???????????not?more?than?gap_size?were?filled?in?this?stage.?The?default?
%???????????Gap_size?is?1?pixels.
%
%???????Output?:
%???????cout?-??a?position?pair?list?of?detected?corners?in?the?input?image.
%???????marked_image?-??image?with?detected?corner?marked.
%
%???????Examples
%???????-------
%???????I?=?imread（‘alumgrns.tif‘）;
%???????cout?=?corner（I[][][]0.2）;
%???????[cout?marked_image]?=?corner;
%???????cout?=?corner（[]1.6155）;

%???Algorithm?is?derived?from?:
%???????X.C.?He?and?N.H.C.?Yung?“Curvature?Scale?Space?Corner?Detector?with??
%???????Adaptive?Threshold?and?Dynamic?Region?of?Support”?Proceedings?of?the
%???????17th?International?Conference?on?Pattern?Recognition?2:791-794?August?2004.
%???Improved?algorithm?is?included?in?“A?Corner?Detector?based?on?Global?and?Local?
%???Curvature?Properties”and?submitted?to?Optical?Engineering.?

[ICT_anglesigHLEndpointGap_size]?=?parse_inputs（varargin{:}）;

if?size（I3）==3
????I=rgb2gray（I）;?%?Transform?RGB?image?to?a?Gray?one.?
end
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%?I=im2bw（I0.8）;
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
tic
BW=EDGE（I‘

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2013-10-10?09:44??實驗\
?????目錄???????????0??2013-10-10?09:44??實驗\043\
?????文件???????14393??2008-11-26?10:24??實驗\043\043?（1）.jpg
?????文件???????12785??2008-11-26?10:24??實驗\043\043?（10）.jpg
?????文件???????17690??2008-11-26?10:24??實驗\043\043?（11）.jpg
?????文件???????13005??2008-11-26?10:24??實驗\043\043?（12）.jpg
?????文件???????16889??2008-11-26?10:24??實驗\043\043?（13）.jpg
?????文件???????18001??2008-11-26?10:24??實驗\043\043?（14）.jpg
?????文件???????16965??2008-11-26?10:24??實驗\043\043?（15）.jpg
?????文件???????14922??2008-11-26?10:24??實驗\043\043?（16）.jpg
?????文件???????14348??2008-11-26?10:24??實驗\043\043?（17）.jpg
?????文件???????18230??2008-11-26?10:24??實驗\043\043?（18）.jpg
?????文件???????16790??2008-11-26?10:24??實驗\043\043?（19）.jpg
?????文件???????13151??2008-11-26?10:24??實驗\043\043?（2）.jpg
?????文件???????15771??2008-11-26?10:24??實驗\043\043?（20）.jpg
?????文件???????16162??2008-11-26?10:24??實驗\043\043?（21）.jpg
?????文件???????14266??2008-11-26?10:24??實驗\043\043?（22）.jpg
?????文件???????14010??2008-11-26?10:24??實驗\043\043?（23）.jpg
?????文件???????16998??2008-11-26?10:24??實驗\043\043?（24）.jpg
?????文件???????18112??2008-11-26?10:24??實驗\043\043?（25）.jpg
?????文件???????14791??2008-11-26?10:24??實驗\043\043?（26）.jpg
?????文件???????15035??2008-11-26?10:24??實驗\043\043?（27）.jpg
?????文件???????15069??2008-11-26?10:24??實驗\043\043?（28）.jpg
?????文件???????15636??2008-11-26?10:24??實驗\043\043?（29）.jpg
?????文件???????13970??2008-11-26?10:24??實驗\043\043?（3）.jpg
?????文件???????13788??2008-11-26?10:24??實驗\043\043?（30）.jpg
?????文件???????15703??2008-11-26?10:24??實驗\043\043?（31）.jpg
?????文件???????18029??2008-11-26?10:24??實驗\043\043?（32）.jpg
?????文件???????13470??2008-11-26?10:24??實驗\043\043?（33）.jpg
?????文件???????13681??2008-11-26?10:24??實驗\043\043?（34）.jpg
?????文件???????13914??2008-11-26?10:24??實驗\043\043?（35）.jpg
............此處省略339個文件信息