边缘检测：Canny边缘检测和sobel边缘检测比较

Canny算子和Sobel算子用于图像边缘检测，代码如下：

clear all
close all
SourcePic=imread('D:\毕业设计\Images\pic_loc\1870358530205041511.jpg');
subplot(131);
imshow(SourcePic);title('SourcePic');

f=rgb2gray(SourcePic);
thresh=[0.01,0.17];
sigma=2;%定义高斯参数
BW = edge(double(f),'canny',thresh,sigma);
subplot(132);
imshow(BW);
title('canny 边缘检测');

[Horizontal Threshold]=edge(f,'sobel','horizontal');%edge detect
H_V=edge(f,'sobel',Threshold);
subplot(133);
imshow(H_V),title('sobel边缘检测');

实验结果：