Search for line passing through a point in edge image

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Hi all
I have an color image and I converted it to gray image then I do edge detection using 'canny'. The edge image contains horizontal, vertical and inclined lines. For specific pixel (xp,yp) in the edge image, I want to search for a vertical line that pass through this point.
Can anyone help me to find to a method to search or detect a vertical line passing in this point. Your help is highly appreciated.
I started with:
Jan on 5 Mar 2013
@Mary: Image Analyst had posted a link to the page, where you can upload images. Then post the link inside < and > or even better in << and &gt&gt. Please explain any details of "I cuoldn't" to allow us to suggest an improvement.

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Accepted Answer

ChristianW on 4 Mar 2013
doc hough

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