matlab.zip_bentd41_image filtering_westim5_图像_图像分割

%example1001.m %计算梯度 %Xihu Hangzhou %2018-05-01 clear;clc;close all I = imread('coins.jpg'); [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; [Gx, Gy] = imgradientxy(I); [Gmag, Gdir] = imgradient(Gx, Gy); figure; imshowpair(Gmag, Gdir, 'montage'); axis off; title('Gradient Magnitude (Gmag) and Gradient Direction (Gdir) using Sobel method') figure; imshowpair(Gx, Gy, 'montage'); axis off; title('Directional Gradients, Gx and Gy, using Sobel method')