霍夫变换-检测直线

matlab版代码

%% 入口图像为bw,出口图像为fclc,clear;img=imread('./image/road.jpg');subplot(221),imshow(img),title('original image');bw=im2bw(img,0.7);subplot(222),imshow(bw),title('bw image');tresh=[0.1,0.15];sigma=2;f=edge(double(bw),'canny',tresh,sigma);subplot(223),imshow(f,[]),title('canny边缘检测');[H,theta,rho]=hough(f,'RhoResolution',0.5);peak=houghpeaks(H,5);lines=houghlines(f,theta,rho,peak);subplot(224),imshow(f,[]),title('Hough Transform Detect Result');hold onfor k=1:length(lines)    xy=[lines(k).point1;lines(k).point2];    plot(xy(:,1),xy(:,2),'LineWidth',2,'Color','red');end