clc,clear,close all;
I=imread('850.bmp');
I=rgb2gray(I);
Roberts=zeros(size(I));
m_rows=size(I,1);
n_colums=size(I,2);
for m=1:(m_rows-1)
for n=1:(n_colums-1)
Roberts(m,n)=abs(I(m,n)-I(m+1,n+1))+abs(I(m,n+1)-I(m+1,n));
if Roberts(m,n)>8
Roberts(m,n)=1;
else Roberts(m,n)=0;
end
end
end
figure(1);
tic;[Roberts,thresh] = EDGE(I,'roberts');toc;
imshow(Roberts);
print(1,'-djpeg','d:\Roberts.jpg');
figure(2);
tic;Prewitt = EDGE(I,'prewitt');toc;
imshow(Prewitt);
print(2,'-djpeg','d:\Prewitt.jpg');
figure(3);
tic;Sobel = EDGE(I,'sobel');toc;
imshow(Sobel);
print(3,'-djpeg','d:\Sobel.jpg');
figure(4);
tic;[Laplacian,thresh] = EDGE(I,'log');toc;
imshow(Laplacian);
print(4,'-djpeg','d:\Laplacian.jpg');
figure(5);
tic;zerocross = EDGE(I,'zerocross');toc;
imshow(zerocross);
print(5,'-djpeg','d:\zerocross.jpg');
figure(6);
tic;Canny = EDGE(I,'canny');toc;
imshow(Canny);
print(6,'-djpeg','d:\Canny.jpg');
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