www.gusucode.com > images 案例代码 matlab源码程序 > images/CalculateGradientMagnitudeAndGradientDirectionExample.m
%% Calculate Gradient Magnitude and Gradient Direction % %% % Read image into workspace. I = imread('coins.png'); %% % Calculate gradients and display. [Gmag, Gdir] = imgradient(I,'prewitt'); figure; imshowpair(Gmag, Gdir, 'montage'); title('Gradient Magnitude, Gmag (left), and Gradient Direction, Gdir (right), using Prewitt method') axis off;