zhongzhi(file).m

MATLAB简单应用

function zhongzhi(file)
I=imread(file);
I=im2double(I);
J=imnoise(I,'salt & pepper',0.1);
[m,n]=size(J);
J1=zeros(m+2,n+2);
J1(2:m+1,2:n+1)=J;
J1(1,1)=J(1,1);
J1(1,n+1)=J(1,n);
J1(1+m,n+1)=J(m,n);
J1(m+1,1)=J(m,1);
J1(2,2:(n+1))=J(1,1:n);
J1(m+1,2:(n+1))=J(m,1:n);
J1(2:(m+1),2)=J(1:m,1);
J1(2:(m+1),n+1)=J(1:m,n);
figure,imshow(J1);
A=zeros(m,n);
B=zeros(1,9);
for i=1:m
    for j=1:n
        C=reshape(J1(i:(i+2),j:(j+2)),1,9);
        D=sort(C);
        E=ceil(9/2);
        F=D(E);
        A(i,j)=F;
    end
end
figure,imshow(A)