图形图像处理

开发平台：

Matlab

sobellena.m：源码内容

							I=imread('lena.bmp');
I=im2double(I);
figure;
imshow(I);title('org img');
[height width R]=size(I);
%Dx=[-1 -2 -1
    %0   0  0
    %1   2  1];
%Dy=[-1 0 1
    %-2 0 2 
    %-1 0 1];
for i=2:height-1
    for j=2:width-1
        Dx=[I(i+1,j-1)-I(i-1,j-1)]+2*[I(i+1,j)-I(i-1,j)]+[I(i+1,j+1)-I(i-1,j+1)];
        Dy=[I(i-1,j+1)-I(i-1,j-1)]+2*[I(i,j+1)-I(i,j-1)]+[I(i+1,j+1)-I(i+1,j-1)];
       S(i,j)=sqrt(Dx^2+Dy^2);
     
    end
end
figure;
imshow(S);
for i=1:255
    for j=1:255
       if (S(i,j)<1)
            S(i,j)=1;
        else S(i,j)=0;
        end
    end
end
figure;
imshow(S,[]);

						