function?[coutmarked_imgcurvature]=arcss（varargin）
[IHLGap_sizeEP]?=?parse_inputs（varargin{:}）;
%%
%When?you?give?inputs?manually?then?comment?the?two?above?lines?and?uncomment
%the?following?lines:
%function?[coutmarked_imgcurvature]=arcss（）%for?manual?input
%I?=?imread（‘Lena.bmp‘）;
%H?=?0.7;
%L?=?0.2;
%Gap_size?=?1;
%EP?=?0;

%%


%{
Find?corners?in?intensity?image.

Publications:
=============
1.?M.?Awrangjeb?and?G.?Lu?揂n?Improved?Curvature?Scale-Space?Corner?Detector?and?a?Robust?Corner?Matching?Approach?for?Transformed?Image?Identification?IEEE?Transactions?on?Image?Processing?17（12）?2425?441?2008.
2.?M.?Awrangjeb?G.?Lu?and?M.?M.?Murshed?揂n?Affine?Resilient?Curvature?Scale-Space?Corner?Detector?32nd?IEEE?International?Conference?on?Acoustics?Speech?and?Signal?Processing?（ICASSP?2007）?Hawaii?USA?1233?236?2007.

Better?results?will?be?found?using?following?corner?detectors:
==============================================================
1.??M.?Awrangjeb?G.?Lu?and?C.?S.?Fraser?揂?Fast?Corner?Detector?based?on?the?Chord-to-Point?Distance?Accumulation?Technique?Digital?Image?Computing:?Techniques?and?Applications?（DICTA?2009）?519-525?2009?Melbourne?Australia.
2.??M.?Awrangjeb?and?G.?Lu?揜obust?Image?Corner?Detection?based?on?the?Chord-to-Point?Distance?Accumulation?Technique?IEEE?Transactions?on?Multimedia?10（6）?1059?072?2008.

Source?codes?available:
=======================
http://www.mathworks.com/matlabcentral/fileexchange/authors/39158

%???????Syntax?:????????
%???????[coutmarked_img?curvature]?=?corner_css（I?H????L?Gap_size?End_Point）
%???????[coutmarked_img?curvature]?=?corner_css（I?0.7?0.2???1?????0）
%
%???????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.
%???????HL?-??high?and?low?threshold?of?Canny?edge?detector.?The?default?value
%???????????is?0.7?and?0.2.
%???????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.
%???????End_Point?-?1?if?you?want?to?get?the?end?points?of?the?curves?as
%???????corners?0?otherwise;?default?is?0.
%
%???????Output?:
%???????cout?-??a?position?pair?list?of?detected?corners?in?the?input?image.
%???????marked_image?-??image?with?detected?corner?marked.
%???????curvature?-?curvature?values?at?the?corner?locations

%}
%%

global?GFP;
GFP{1}?=?[300?5?0.03];?%?col1?=?affine-length?col2?=?sigma?col3?=?Threshold
GFP{2}?=?[250?4?0.03];
GFP{3}?=?[200?3?0.03];

if?size（I3）==3
????I=rgb2gray（I）;?%?Transform?RGB?image?to?a?Gray?one.?
end

%detect?edges
%tic
BW=edge（I‘canny‘[LH]）;??%?Detect?edges:?[LH]?low?and?high?sensitivity?thresholds?if?not?specified?canny?selects
%time_for_detecting_edge=toc?%?automatically

%extract?curves
%tic
[curvecurve_startcur