hough变换

>> doc hough

>> f=imread('house.jpg');

>> g=im2bw(f);

>> bw=edge(g,'canny');

>> [H,T,R]=hough(bw,'RhoResolution',0.5);

>> subplot(2,1,1),imshow(f);title('原图');

>> subplot(2,1,2),imshow(H);title('hough变换图像');

>> xlabel('\theta'),ylabel('\rho');

>> axis on,axis normal,hold on;

>> colormap(hot);