zhifangtujunheng.m

均值滤波,加权滤波,中值滤波的MATLAB实例,用于图象及信号的处理

f=imread('Fig3.15(a)4.jpg'); 
[m,n]=size(f); 
g=zeros(m,n); 
%f1=double(f); 
c=255; 
result=0; 
y=zeros(1,256); 
z=zeros(1,256); 
x=zeros(1,256); 
%计算原图所有灰度级像素数y(k) 
for i=1:m 
 for j=1:n 
 t=f(i,j); 
 y(t+1)=y(t+1)+1; 
 end 
end 
%原图灰度分布概率z(k) 
for k=1:256 
 z(k)=y(k)/(m*n); 
end 
%计算统计概率x(k) 
for k1=1:256 
 result=result+z(k1); 
 x(k1)=result; 
end 
%统计概率取整 
x=round(c*x);
for i1=1:m 
 for j1=1:n 
 g(i1,j1)=x(f(i1,j1)+1); 
 end 
end 
G=uint8(g);

figure(2);imshow(G);title('均衡化');
figure(3);histeq(f);