30-基于中值的Ostu图像分割方法
30-基于中值的Ostu图像分割方法百度网盘链接:https://pan.baidu.com/s/1Ciw1JIZC_joe-AAbzb2JnA
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clc,clear,close all
warning off
im = imread('lena.tif');
figure(1), imshow(im)
= imhist(im);
L = 256;
if(size(im,3)>1)
im = rgb2gray(im);
end
= size(im);
f = count./(m*n);
for i=1:L
if(f(i)~=0)
st = i;
break;
end
end
for i=L:-1:1
if(f(i)~=0)
ed = i;
break;
end
end
j=1;
for i=1:ed-st
w0(j) = sum( f(1:i) );
j=j+1;
end
w0 = w0+0.001;
w1 = 1-w0;
m0 = median(1:ed-st);
m1 = median(ed-st+1:L);
mad1=0;
for i=1:ed-st
mad1 = mad1+f(i)./w0 * abs(i-m0);
end
mad2=0;
for i=ed-st+1:L
mad2 = mad2+f(i)./w1 * abs(i-m1);
end
k=w0.*mad1 + w1.*mad2;
= min(k);
thr = st + index;
bw = im>thr;
figure(2), imshow(bw)
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