function?[bdybdx]=backward_gradient（f）;
%?function?[bdxbdy]=backward_gradient（f）;
%??
%???created?on?04/26/2004
%???author:?Chunming?Li
%???email:?li_chunming@hotmail.com
%???Copyright?（c）?2004-2006?by?Chunming?Li
[nrnc]=size（f）;
bdx=zeros（nrnc）;
bdy=zeros（nrnc）;

bdx（2:nr:）=f（2:nr:）-f（1:nr-1:）;
bdy（:2:nc）=f（:2:nc）-f（:1:nc-1）;

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件?????????351??2005-10-08?14:15??backward_gradient.m
?????文件?????????787??2005-10-08?14:14??binaryfit.m
?????文件?????????383??2008-10-22?09:26??BoundMirrorEnsure.m
?????文件?????????316??2008-10-22?09:10??BoundMirrorExpand.m
?????文件??????????90??2003-12-22?19:36??BoundMirrorShrink.m
?????文件?????????791??2005-10-08?14:02??curvature.m
?????文件?????????280??2005-10-08?14:16??Delta.m
?????文件????????1195??2008-10-28?19:01??evolution_cv.m
?????文件?????????367??2005-10-08?14:15??forward_gradient.m
?????文件?????????711??2004-10-08?12:52??get_contour.m
?????文件?????????281??2005-10-08?14:16??Heaviside.m
?????文件?????????337??2005-10-08?14:18??plotLevelSet.m
?????文件?????????588??2005-10-08?14:28??sdf2circle.m
?????文件?????????689??2005-10-08?14:22??signed_distance.m
?????文件????????1198??2008-10-31?20:52??test.m
?????文件???????11766??2004-06-09?12:07??three.bmp
?????文件???????16434??2004-07-23?20:36??twocells.bmp
?????文件???????14286??2005-07-25?15:45??vessel.bmp
?????目錄???????????0??2018-06-08?09:29??水平集C-V模型\
?????文件?????????351??2005-10-08?14:15??水平集C-V模型\backward_gradient.m
?????文件?????????787??2005-10-08?14:14??水平集C-V模型\binaryfit.m
?????文件?????????383??2008-10-22?09:26??水平集C-V模型\BoundMirrorEnsure.m
?????文件?????????316??2008-10-22?09:10??水平集C-V模型\BoundMirrorExpand.m
?????文件??????????90??2003-12-22?19:36??水平集C-V模型\BoundMirrorShrink.m
?????文件???????27512??2009-09-07?17:15??水平集C-V模型\brain1.bmp
?????文件?????????791??2005-10-08?14:02??水平集C-V模型\curvature.m
?????文件?????????280??2005-10-08?14:16??水平集C-V模型\Delta.m
?????文件????????1195??2008-10-28?19:01??水平集C-V模型\evolution_cv.m
?????文件?????????367??2005-10-08?14:15??水平集C-V模型\forward_gradient.m
?????文件?????????711??2004-10-08?12:52??水平集C-V模型\get_contour.m
?????文件?????????281??2005-10-08?14:16??水平集C-V模型\Heaviside.m
............此處省略8個文件信息