利用Matlab实现图像的边缘提取

clear;clc;
close all;
I=imread('lena.bmp');
I=rgb2gray(I);
imshow(I,[]);
title('Original Image');

sobelBW=edge(I,'sobel');
figure;
imshow(sobelBW);
title('Sobel Edge');

robertsBW=edge(I,'roberts');
figure;
imshow(robertsBW);
title('Roberts Edge');

prewittBW=edge(I,'prewitt');
figure;
imshow(prewittBW);
title('Prewitt Edge');

logBW=edge(I,'log');
figure;
imshow(logBW);
title('Laplasian of Gaussian Edge');

cannyBW=edge(I,'canny');
figure;
imshow(cannyBW);
title('Canny Edge');