www.gusucode.com > images 案例代码 matlab源码程序 > images/CalculateDirectionalGradientsExample.m
%% Calculate Directional Gradients % %% % Read image into workspace. I = imread('coins.png'); %% % Calculate gradients and display them. [Gx, Gy] = imgradientxy(I); [Gmag, Gdir] = imgradient(Gx, Gy); figure, imshow(Gmag, []), title('Gradient magnitude') figure, imshow(Gdir, []), title('Gradient direction') title('Gradient Magnitude and Gradient Direction') figure; imshowpair(Gx, Gy, 'montage'); axis off; title('Directional Gradients, Gx and Gy')