function?[OutputprintXofCenterYofCenter]?=?centralizing（fingerprintctrl）
%	?modified?by?PRTsinghua@hotmail.com

imgN=size（fingerprint1）;
imgM=size（fingerprint2）;

image?=?wiener2（fingerprint[3?3]）;
[GxGy]?=?gradient（image）;
orientnum?=?wiener2（2.*Gx.*Gy[3?3]）;
orientden?=?wiener2（（Gx.^2）?-?（Gy.^2）[3?3]）;
W?=?8;
ll?=?9;
orient?=?zeros（imgN/WimgM/W）;
%-----------------------------------------------
points=（imgN/W）*（imgM/W）;
for?i?=?1:1:points
????x?=?floor（（i-1）/（imgM/W））*W+1;
????y?=?mod（i-1（imgN/W））*W+1;
????numblock?=?orientnum（y:y+W-1x:x+W-1）;
????denblock?=?orientden（y:y+W-1x:x+W-1）;
????
????somma_num=sum（sum（numblock））;
????somma_denom=sum（sum（denblock））;
????
????if?somma_denom?~=?0
????????inside?=?somma_num/somma_denom;
????????angle?=?0.5*atan（inside）;
????else
????????angle?=?pi/2;
????end
????%?each?block
????if?angle?????????if?somma_num?????????????angle?=?angle?+?pi/2;
????????else
????????????angle?=?angle?+?pi;
????????end
????else
????????if?somma_num?>?0
????????????angle?=?angle?+?pi/2;
????????end
????end
????orient（1+（y-1）/W1+（x-1）/W）?=?angle;???
end

binarize?=?（orient?[bibj]?=?find（binarize）;
xdir?=?zeros（WW）;
ydir?=?zeros（WW）;
for?k?=?1:1:size（bj1）
????i?=?bj（k）;
????j?=?bi（k）;
????if?orient（ji）?????????x?=?fix（ll*cos（orient（ji）-pi/2）/（W/2））;
????????y?=?fix（ll*sin（orient（ji）-pi/2）/（W/2））;
????????xdir（ji）?=?i-x;
????????ydir（ji）?=?j-y;
????????
????end
end

binarize2?=?zeros（imgN/WimgM/W）;
for?i?=?1:1:size（bj1）
????x?=?bj（i）;
????y?=?bi（i）;
????if?~（xdir（yx）??imgM/W?|?ydir（yx）?>?imgN/W）
????????while?binarize（ydir（yx）xdir（yx））?>?0
????????????xtemp?=?xdir（yx）;
????????????ytemp?=?ydir（yx）;
????????????if?xtemp??imgM/W?|?ytemp?>?imgN/W
????????????????break;
????????????end
????????????x?=?xtemp;
????????????y?=?ytemp;
????????????if?xdir（yx）??imgM/W?|?ydir（yx）?>?imgN/W
????????????????if?x-1?>?0
????????????????????while?binarize（yx-1）?>?0
????????????????????????x?=?x-1;
????????????????????????if?x-1?????????????????????????????break;
????????????????????????end
????????????????????end
????????????????end
????????????????break;
????????????end
????????end
????end
????binarize2（yx）?=?binarize2（yx）+1;
end

[tempy]?=?max（binarize2（1:end-7:））;
[temp2x]?=?max（temp）;
angle?=?orient（y（x）x）-pi/2;
XofCenter=round（x*W-（W/2）-（ll/2）*cos（angle））;
YofCenter=round（y（x）*W-（W/2）-（ll/2）*sin（angle））;
Outputprint=binarize2;

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

?????文件??????66614??2001-01-11?11:56??matlab?sourcecode?for?指紋\19_7.bmp

?????文件?????132118??2000-08-21?00:28??matlab?sourcecode?for?指紋\22443.bmp

?????文件??????66614??2001-01-11?11:56??matlab?sourcecode?for?指紋\37_3.bmp

?????文件??????66614??2001-01-11?11:56??matlab?sourcecode?for?指紋\37_5_2.bmp

?????文件??????66614??2001-01-11?11:56??matlab?sourcecode?for?指紋\37_7.bmp

?????文件???????2627??2004-03-05?03:41??matlab?sourcecode?for?指紋\centralizing.m

?????文件???????1489??2004-03-05?05:10??matlab?sourcecode?for?指紋\Cropping.m

?????文件??????28834??2004-03-08?02:35??matlab?sourcecode?for?指紋\fpextractdemo.m

?????文件????????578??2004-03-05?05:11??matlab?sourcecode?for?指紋\gabor2d_sub.m

?????文件??????65792??2004-03-08?02:22??matlab?sourcecode?for?指紋\informations.dat

?????文件?????????81??2004-06-30?00:52??matlab?sourcecode?for?指紋\readme.txt

?????文件???????1717??2004-03-05?05:13??matlab?sourcecode?for?指紋\sector_norm.m

?????文件????????572??2004-03-05?05:12??matlab?sourcecode?for?指紋\vedicentro.m

?????文件????????929??2004-03-05?05:14??matlab?sourcecode?for?指紋\whichsector.m

????...D..R?????????0??2005-04-12?14:44??matlab?sourcecode?for?指紋

-----------?---------??----------?-----??----

???????????????501193????????????????????15