Question

我想要实现的是这个 https://sites.google.com/a/vt.edu/motion-vision/home/license-plate-detection-by-hough-transform 我通过检测霍夫线。但是在这一步之后我无法理解这个程序＆＃34;现在，通过设置高度和宽度的比率，可以找到可能的水平和垂直对，以指示牌照周围的那些线段。结果如图4所示。＆＃34; ..有人向我解释或添加代码会有所帮助。

我的代码：

clc
RGB = imread('new.jpg'); %Load image
[I2, rect] = imcrop(RGB);
I  = rgb2gray(I2); %Convert image to Gray
%imshow(I); %Show image


BW = edge(I,'canny');
%imshow(BW);

[H,T,R] = hough(BW);
imshow(H,[],'XData',T,'YData',R,...
            'InitialMagnification','fit');

xlabel('\theta'), ylabel('\rho');
axis on, axis normal, hold on;
P  = houghpeaks(H,20,'threshold',ceil(0.1*max(H(:))));
x = T(P(:,2)); y = R(P(:,1));
plot(x,y,'s','color','white');


lines = houghlines(BW,T,R,P,'FillGap',5,'MinLength',20);
figure, imshow(BW), hold on
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 beginnings and ends of lines
   plot(xy(1,1),xy(1,2),'x','LineWidth',2,'Color','yellow');
   plot(xy(2,1),xy(2,2),'x','LineWidth',2,'Color','red');

   % Determine the endpoints of the longest line segment
   len = norm(lines(k).point1 - lines(k).point2);
   if ( len > max_len)
      max_len = len;
      xy_long = xy;
   end
end
%[I2, rect] = imcrop(I);
%figure, imshow(I2);

使用houghlines检测matlab中的行

0 个答案: