pinghua(file).m

利用MATLAB设计的小型数字图像处理系统

function pinghua(file)
I=imread(file);
I=im2double(I);
J=imnoise(I,'gaussian',0,0.005);
[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);
for i=1:m
    for j=1:n
J(i,j)=(J1(i,j)+J1(i,j+1)+J1(i,j+2)+J1(i+1,j)+J1(i+1,j+1)+J1(i+1,j+2)+J1(i+2,j)+J1(i+2,j+1)+J1(i+2,j+2))/9;
      
    end
end
figure,imshow(J)