Houghtransform: Hough line function

2011 11 27
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hello! I have to detect only the horizontal lines in the image using the hough transform.... but when i use houghline function n then plot the detected lines it plot both horizontal and vertical lines.... how can i remove the vertical lines??????????

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Image Analyst
Image Analyst 2011-11-27

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If you have the endpoints for all the lines, it should be rather straightforward - just delete those where the delta y of the endpoints is less than the delta x or some other delta that you want to use to define vertical.

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qjwgeuwe
qjwgeuwe 2011-11-27
this is what i have
lines = houghlines(edge_img,theta,rho,pp,'FillGap',100,'MinLength',100);
figure, imshow(I), hold on
max_len = 0;
totlen = 0;
for k = 1:length(lines)
xy = [lines(k).point1; lines(k).point2];
plot(xy(:,1),xy(:,2),'LineWidth',1,'Color','green');
end
fimg= my edge image using sobel edge function
pp= hough peaks (for rho and theta lines)
theta=-90 to 90
rho= +/-sqrt diagonal of image
please correct it as per my objective.... thanks!
Image Analyst
Image Analyst 2011-11-27
But it doesn't look like you even made any sort of attempt to try my suggestion. Why not?
Fill in the code where you read in an image so I can run it. Hopefully you used a standard demo image that ships with MATLAB. Or else upload your image somewhere.
qjwgeuwe
qjwgeuwe 2011-11-27
please find the code and the image link in ur MSG box
qjwgeuwe
qjwgeuwe 2011-11-28
have you received???????
qjwgeuwe
qjwgeuwe 2011-11-28
please advise the solution.... i tried but getting no result...
Image Analyst
Image Analyst 2011-11-28
No. I don't have a message box. Where did you send it? Why don't you just edit your above question right here and add the code?
Walter Roberson
Walter Roberson 2011-11-28
http://www.mathworks.com/matlabcentral/answers/7924-where-can-i-upload-images-and-files-for-use-on-matlab-answers
qjwgeuwe
qjwgeuwe 2011-11-28
well the problem has been solved thanks for your suggestions.... :)

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