matlab

I = imread('yourimage');
I = rgb2gray(I);
%五種邊緣檢測
figure('Name','進行五種邊緣檢測');
subplot(2,3,1);
imshow(I);
title('原圖');

BW1=edge(I,'Roberts',0.16);
subplot(2,3,2);
imshow(BW1);
title('Robert運算元邊緣檢測')

BW2=edge(I,'Sobel',0.16);
subplot(2,3,3);
imshow(BW2);
title('Sobel運算元邊緣檢測')

BW3=edge(I,'Prewitt'
 
,0.06);
subplot(2,3,4);
imshow(BW3);
title('Prewitt運算元邊緣檢測');

BW4=edge(I,'LOG',0.012);
subplot(2,3,5);
imshow(BW4);
title('LOG運算元邊緣檢測')

BW5=edge(I,'Canny',0.35);
subplot(2,3,6);
imshow(BW5);
title('Canny運算元邊緣檢測')

% H_gray = rgb2gray(H);
% imshow(H_gray)