imfinfo?‘lbc1.bmp‘;
lbc=imread（‘lbc1.bmp‘）;
for?i=1:ans.Height
????for?j=1:ans.Width
????????random=rand（）*4;
????????if（random<1）
????????????L（ij）=1;L（ij+1）=1;L（i+1j）=0;L（i+1j+1）=0;
????????????B（ij）=1;B（ij+1）=0;B（i+1j）=1;B（i+1j+1）=0;
????????????C（ij）=1;C（ij+1）=0;C（i+1j）=0;C（i+1j+1）=1;
????????else
????????????if（random<2）
????????????????L（ij）=1;L（ij+1）=1;L（i+1j）=0;L（i+1j+1）=0;
????????????????B（ij）=0;B（ij+1）=1;B（i+1j）=0;B（i+1j+1）=1;
????????????????C（ij）=0;C（ij+1）=1;C（i+1j）=1;C（i+1j+1）=0;
????????????else
????????????????if（random<3）
????????????????????L（ij）=0;L（ij+1）=0;L（i+1j）=1;L（i+1j+1）=1;
????????????????????B（ij）=1;B（ij+1）=0;B（i+1j）=1;B（i+1j+1）=0;
????????????????????C（ij）=0;C（ij+1）=1;C（i+1j）=1;C（i+1j+1）=0;
????????????????else
????????????????????if（random<4）?
????????????????????????L（ij）=0;L（ij+1）=0;L（i+1j）=1;L（i+1j+1）=1;
????????????????????????B（ij）=0;B（ij+1）=1;B（i+1j）=0;B（i+1j+1）=1;?
????????????????????????C（ij）=1;C（ij+1）=0;C（i+1j）=0;C（i+1j+1）=1;
????????????????????end
????????????????end
????????????end
????????end
????end?
end

for?i=1:ans.Height
????for?j=1:ans.Width
????????if（lbc（ij）==0）
????????????random=rand（）*4;
????????????if（random<1）
????????????????L（ij）=0;L（ij+1）=0;L（i+1j）=1;L（i+1j+1）=1;
????????????????B（ij）=0;B（ij+1）=1;B（i+1j）=0;B（i+1j+1）=1;
????????????????C（ij）=0;C（ij+1）=1;C（i+1j）=1;C（i+1j+1）=0;
????????????else
????????????????if（random<2）
????????????????????L（ij）=0;L（ij+1）=0;L（i+1j）=1;L（i+1j+1）=1;
????????????????????B（ij）=1;B（ij+1）=0;B（i+1j）=1;B（i+1j+1）=0;
????????????????????C（ij）=1;C（ij+1）=0;C（i+1j）=0;C（i+1j+1）=1;
????????????????else
????????????????????if（random<3）
????????????????????????L（ij）=1;L（ij+1）=1;L（i+1j）=0;L（i+1j+1）=0;
????????????????????????B（ij）=0;B（ij+1）=1;B（i+1j）=0;B（i+1j+1）=1;
????????????????????????C（ij）=1;C（ij+1）=0;C（i+1j）=0;C（i+1j+1）=1;
????????????????????else
????????????????????????if（random<4）
????????????????????????????L（ij）=1;L（ij+1）=1;L（i+1j）=0;L（i+1j+1）=0;
????????????????????????????B（ij）=1;B（ij+1）=0;B（i+1j）=1;B（i+1j+1）=0;?
????????????????????????????C（ij）=0;C（ij+1）=1;C（i+1j）=1;C（i+1j+1）=0;
????????????????????????end
????????????????????end
????????????????end
????????????end
????????end
????end
end
imwrite（L‘0l.bmp‘‘bmp‘）;
imwrite（B‘2b.bmp‘‘bmp‘）;
imwrite（C‘1c.bmp‘‘bmp‘）;

L1=imread（‘0l.bmp‘）;?
B1=imread（‘2b.bmp‘）;?
C1=imread（‘1c.bmp‘）;
random=rand（）*3;
if（random<1）
????lbc=L1;lb=L1;lc=L1;bc=L1;
else
????if（random<2）
????????lbc=B1;lb=B1;lc=B1;bc=B1;
????else
????????lbc=C1;lb=C1;lc=C1;bc=C1;
????end
end

for?i=1:ans.Height+1
????for?j=1:ans.Width+1
????????if（（xor（xor（L1（ij）B1（ij））C1（ij））==0）&&（xor（xor（L1（i+1j）B1（i+1j））C1（i+1j））==0）&&（xor（xor（L1（i+1j+1）B1（i+1j+1））C1（i+1j+1））==0）&&（xor（xor（L1（ij+1）B1（ij+1））C1（ij+1））==0））
????????????lbc（ij）=0;?
????????else

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件??????754078??2012-05-17?02:48??0l.bmp
?????文件??????754078??2012-05-17?02:48??1c.bmp
?????文件??????754078??2012-05-17?02:48??2b.bmp
?????文件??????754078??2012-05-17?02:48??3bc.bmp
?????文件??????754078??2012-05-17?02:48??4lb.bmp
?????文件??????754078??2012-05-17?02:48??5lc.bmp
?????文件????????3716??2012-05-17?02:44??lbc0.asv
?????文件????????3716??2012-04-22?18:37??lbc0.m
?????文件???????95934??2012-04-22?02:33??lbc1.bmp
?????文件??????754078??2012-05-17?02:48??lbc2.bmp
?????文件?????2351104??2012-05-17?02:50??可視密碼.ppt