视频中的线路功率检测

Question

我有一个小项目“使用Matlab检测列车上的电线”。

。我用红色圈出的电线是我需要检测的电线。

我尝试了egde检测，但不知道接下来该做什么。有谁能建议任何方法来做到这一点？这是video。

的链接

Answer 1

您可以使用Hough Transform进行线路检测。

我的大多数帖子都基于Hough Transform文档。

示例代码：

%Read input image from imgur
I = imread('https://i.stack.imgur.com/EcHfy.png');

J = zeros(size(I,1), size(I,2));

%Select dark pixels (assume wires are dark).
J((I(:,:,1) < 80) & (I(:,:,2) < 80) & (I(:,:,3) < 80)) = 1;

%figure;imshow(J);

%Find the edges in the image using the edge function.
BW = edge(J,'canny');
%figure;imshow(BW);


%Compute the Hough transform of the binary image returned by edge.
[H,theta,rho] = hough(BW);

%Display the transform, H, returned by the hough function.
% figure;imshow(imadjust(mat2gray(H)),[], 'XData',theta, 'YData',rho, 'InitialMagnification','fit');
% xlabel('\theta (degrees)');ylabel('\rho');axis on;axis normal ;hold on;colormap(gca,hot);

%Find the peaks in the Hough transform matrix, H, using the houghpeaks function.
P = houghpeaks(H,5,'threshold',ceil(0.3*max(H(:))));

%Superimpose a plot on the image of the transform that identifies the peaks.
%x = theta(P(:,2));y = rho(P(:,1));plot(x,y,'s','color','black');

%Find lines in the image using the houghlines function.
lines = houghlines(BW,theta,rho,P,'FillGap',50,'MinLength',7);

%Create a plot that displays the original image with the lines superimposed on it.
figure, imshow(I), 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
% highlight the longest line segment
plot(xy_long(:,1),xy_long(:,2),'LineWidth',2,'Color','red');

结果：

说明：
您可以使用形态操作来改善结果 修改我的代码＆＃34;选择暗像素（假设电线是暗的）＆＃34;。
更改霍夫变换参数。