写在前面的话：文章内容来源于但不限于网络、书籍、个人心得体会等，意在总结和方便各位同行快速参考，共同学习进步，记录自己的问题。错误在所难免，有请各位批评斧正。如有侵权，烦请第一时间通知，我会立即删除相关内容，万分感谢！
Hough变换小程序，拿去学习吧，时间久了，可能有错误。
I= imread('2.png'); BW1=im2bw(I,0.95); BW2=double(BW1); BW3=edge(BW2,'sobel'); [H,T,R]=hough(BW3); imshow(H,[],'XData',T,'YData',R,'InitialMagnification','fit'); xlabel('\theta');ylabel('\rho'); axis on,axis normal,hold on; P=houghpeaks(H,5,'threshold',ceil(0.3*max(H(:)))); x=T(P(:,2));y=R(P(:,1)); plot(x,y,'s','color','white'); lines=houghlines(BW3,T,R,P,'FillGap',5,'MinLength',7); figure,imshow(BW3),hold on; In images.internal.initSize (line 71) In imshow (line 336) max_len=0; for k=1:length(lines); xy=[lines(k).point1;lines(k).point2]; plot(xy(:,1),xy(:,2),'lineWidth',2,'Color','green'); plot(xy(1,1),xy(1,2),'x''lineWidth',2,'Color','yellow'); plot(xy(2,1),xy(2,2),'x''lineWidth',2,'Color','red'); len=norm(lines(k).point1-lines(k).point2); if(len>max_len) max_len=len; xy_long=xy; end end plot(xy_long(:,1),xy_long(:,2),'LineWidth',2,'Color','cyan');
