%?gethammingdistance?-?returns?the?Hamming?Distance?between?two?iris?templates
%?incorporates?noise?masks?so?noise?bits?are?not?used?for
%?calculating?the?HD
%
%?Usage:?
%?[template?mask]?=?createiristemplate（eyeimage_filename）
%
%?Arguments:
%	template1???????-?first?template
%???mask1???????????-?corresponding?noise?mask
%???template2???????-?second?template
%???mask2???????????-?corresponding?noise?mask
%???scales??????????-?the?number?of?filters?used?to?encode?the?templates
%?????????????????????needed?for?shifting.
%
%?Output:
%???hd??????????????-?the?Hamming?distance?as?a?ratio
%
%?Author:?
%?Libor?Masek
%?masekl01@csse.uwa.edu.au
%?School?of?Computer?Science?&?Software?Engineering
%?The?University?of?Western?Australia
%?November?2003


function?hd?=?gethammingdistance（template1?mask1?template2?mask2?scales）
clc;clear?all
scales=1;
template1=imread（‘d:/image/eye.template.jpg‘）;
mask1=imread（‘d:/image/eye.mask.jpg‘）;
template2=imread（‘d:/010_1_1/010_1_1.template.bmp‘）;
mask2=imread（‘d:/010_1_1/010_1_1.mask.bmp‘）;

template1?=?logical（template1）;
mask1?=?logical（mask1）;

template2?=?logical（template2）;
mask2?=?logical（mask2）;

hd?=?NaN;

%?shift?template?left?and?right?use?the?lowest?Hamming?distance
for?shifts=-8:8
????
????template1s?=?shiftbits（template1?shiftsscales）;
????mask1s?=?shiftbits（mask1?shiftsscales）;
????
????
????mask?=?mask1s?|?mask2;
????
????nummaskbits?=?sum（sum（mask?==?1））;
????
????totalbits?=?（size（template1s1）*size（template1s2））?-?nummaskbits;
????
????C?=?xor（template1stemplate2）;
????
????C?=?C?&?~mask;
????bitsdiff?=?sum（sum（C==1））;
????
????if?totalbits?==?0
????????
????????hd?=?NaN;
????????
????else
????????
????????hd1?=?bitsdiff?/?totalbits;
????????
????????
????????if??hd1?????????????
????????????hd?=?hd1;
????????????
????????end
????????
????????
????end
????
end

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

?????文件???????2342??2008-06-01?11:54??code\Normal_encoding\encode.m

?????文件???????2715??2008-06-15?12:44??code\Normal_encoding\gaborconvolve.m

?????文件???????5035??2003-11-30?13:24??code\Normal_encoding\normaliseiris.m

?????文件???????2739??2008-06-15?12:26??code\Normal_encoding\gaborconvolve.asv

?????文件???????2100??2008-05-26?09:31??code\Normal_encoding\encode.asv

?????目錄??????????0??2008-05-09?15:15??code\Normal_encoding

?????文件???????1472??2003-02-07?09:25??code\Segmentation\addcircle.m

?????文件????????844??2003-02-11?18:57??code\Segmentation\adjgamma.m

?????文件???????2219??2003-11-25?11:11??code\Segmentation\canny.m

?????文件???????1622??2003-11-30?12:20??code\Segmentation\circlecoords.m

?????文件???????2321??2003-11-25?09:42??code\Segmentation\findcircle.m

?????文件???????1090??2003-11-25?10:56??code\Segmentation\findline.m

?????文件????????917??2003-11-25?09:41??code\Segmentation\houghcircle.m

?????文件???????3304??2003-02-11?18:34??code\Segmentation\hysthresh.m

?????文件????????812??2003-11-25?09:23??code\Segmentation\linecoords.m

?????文件???????3683??2003-02-11?18:34??code\Segmentation\nonmaxsup.m

?????文件???????3261??2003-11-25?10:09??code\Segmentation\segmentiris.m

?????目錄??????????0??2008-05-09?15:15??code\Segmentation

?????文件???????1947??2008-06-01?11:53??code\Matching\gethammingdistance.m

?????文件???????1552??2003-11-28?15:59??code\Matching\shiftbits.m

?????文件???????1786??2008-05-26?10:51??code\Matching\gethammingdistance.asv

?????目錄??????????0??2008-05-09?15:15??code\Matching

?????目錄??????????0??2008-12-17?12:30??code

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

????????????????41761????????????????????23