Search code examples
matlabimage-processinghough-transform

Hough Transform source code explanation

hough_in = bwareaopen( bin_im(:,:,n),20);    
% Compute the Hough transform of the image using the hough function
[H,T,R] = hough(hough_in);
P  = houghpeaks(H,3,'threshold',ceil(0.3*max(H(:))));
x = T(P(:,2)); 
y = R(P(:,1));
lines = houghlines(hough_in,T,R,P,'FillGap',5,'MinLength',7);

what does x and y represent here?

Solution

  • x contains the thetas and y the rhos of the detected lines.

    Please refer to:

    https://de.mathworks.com/help/images/ref/hough.html

    and

    https://de.mathworks.com/help/images/ref/houghpeaks.html