function?I_gray?=?Kapur（I_gray）
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
I_gray=double（I_gray）;???????%轉(zhuǎn)化為雙精度
[widthheight]=size（I_gray）;
graylevel=256;???????????????%灰度級(jí)
hist=zeros（1graylevel）;?????%直方圖賦初值
?
%計(jì)算直方圖
for?i=1:width
????for?j=1:height
????????m=I_gray（ij）+1;
????????hist（m）=hist（m）+1;
????end
end

p=zeros（1graylevel）;

for?i=1:1:graylevel
????p（i）=hist（i）/（width*height）;?%直方圖歸一化
end

E1=zeros（1graylevel）;
E2=zeros（1graylevel）;
P=zeros（1graylevel）;
E=zeros（1graylevel）;


for?t=1:1:graylevel
????for?i=1:1:t
????????P（t）=P（t）+p（i）;
????end
????????if（P（t）>0&&P（t）<1）
%???????????????Q=0;
??????????%計(jì)算灰度范圍為[1t]的熵
???????????for?i=1:1:t
???????????????E1（t）=E1（t）-（p（i）/P（t））*log（p（i）/P（t）+eps）;
???????????end
%????????????A（s）=2*log（P（s

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----

?????文件?????238704??2010-01-07?12:09??lungSegmentation\images\2.PNG

?????文件?????207951??2010-01-05?19:48??lungSegmentation\images\3.png

????..A.SH.?????46592??2010-01-07?13:51??lungSegmentation\images\Thumbs.db

?????文件???????1579??2010-01-06?21:30??lungSegmentation\Kapur.m

?????文件???????1410??2010-01-07?11:00??lungSegmentation\kittler.m

?????文件????????554??2010-01-13?10:33??lungSegmentation\LungSegmentation_demo.m

?????文件???????1456??2010-01-06?21:20??lungSegmentation\ostu.m

?????目錄??????????0??2010-01-13?10:33??lungSegmentation\images

?????目錄??????????0??2010-01-13?10:30??lungSegmentation

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

???????????????498246????????????????????9