function?Y_bw=u_diedaifa（Y_jiaozheng）
[m2?n2]=size（Y_jiaozheng）;
Y_bw=Y_jiaozheng;
histgram=zeros（1256）;
tem=0.;tem1=0.;tem2=0.;tem3=0.;
Ti=40;a=2;
for?j=1:m2?????????????????%獲取直方圖
????for?k=1:n2
????????l=Y_jiaozheng（jk）;
????????histgram（l+1）=histgram（l+1）+1;???????
????end
end
while?0<1
????for?j=0:Ti????????????%迭代法得到閥值
????????tem=tem+j.*histgram（j+1）;
????????tem1=tem1+histgram（j+1）;
????end
????for?j=Ti+1:255
????????tem2=tem2+j.*histgram（uint8（j+1））;
????????tem3=tem3+histgram（uint8（j+1））;
????end
????Ti_1=（tem/tem1+tem2/tem3）/2;
????if?abs（Ti-Ti_1）<=a????
????????for?j=1:m2?????????????%閥值確定后灰度算法
????????????for?k=1:n2
????????????????if?Y_jiaozheng（jk）????????????????????Y_bw（jk）=0;
????????????????else
????????????????????Y_bw（jk）=255;????????????????????
????????????????end
????????????end
????????end????????
????????break;
????else?Ti=Ti_1;
????end
end

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件?????1315894??2010-01-29?14:07??1.bmp
?????文件?????1315894??2011-10-21?11:47??1111?（2）.bmp
?????文件?????1315894??2011-01-23?16:06??1111.bmp
?????文件??????641078??2013-07-24?17:40??12.bmp
?????文件?????1315894??2011-10-21?13:57??3333.bmp
?????文件?????1315894??2011-01-23?16:08??9999.bmp
?????文件?????1312822??2011-10-31?16:54??ccccc.bmp
?????文件??????407638??2010-12-23?12:19??hhhh.bmp
?????文件??????307254??2009-11-14?16:24??qr.bmp
?????文件??????307254??2013-08-05?18:04??qr190.bmp
?????文件??????576464??2009-11-07?19:31??qr5.bmp
?????文件??????197582??2009-11-14?16:28??qrotate.bmp
?????文件?????????953??2013-08-03?13:34??u_diedaifa.m
?????文件????????3144??2013-08-03?10:31??u_dingwei.m
?????文件????????1012??2013-08-03?10:56??u_jiaodian.m
?????文件????????2829??2013-08-03?14:24??u_jiaodu.m
?????文件????????8218??2013-07-31?11:55??u_jiaozheng.m
?????文件?????????723??2013-08-03?11:27??u_paixu.m
?????文件???????10784??2013-08-03?18:29??u_pdf1.m
?????文件????????9998??2013-07-28?09:23??u_qr8.m
?????文件????????1767??2013-07-27?17:45??u_xunxiang.m
?????文件????????2687??2013-08-03?13:40??u_zhongxin.m