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Measuring edge thickness using OpenCV

asked 2014-02-11 08:11:40 -0500

ZHT gravatar image

updated 2014-02-13 03:14:31 -0500

berak gravatar image

I have a segmented network from an image and I would like to measure the thickness of the edges at different locations. As one method, I am trying to fit circles inside the edges boundaries and then measure their diameters. I am having difficulties fitting the circles inside the boundary. Could anyone point me in the right direction? Do you have other suggestions?

Thanks in advance.

Here is a sample image. I want to measure the thickness of the white parts.

image description

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Posting some sample image might be helpful for the viewers.

Haris gravatar imageHaris ( 2014-02-11 10:23:15 -0500 )edit

Here you go Haris

ZHT gravatar imageZHT ( 2014-02-12 05:13:55 -0500 )edit

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answered 2014-02-13 02:07:52 -0500

updated 2014-02-13 02:12:11 -0500

You can try to use next algorithm: 1. Use FindContours to your image. 2. Divide contour to small segments (e.g. 5px). 3. Use equation of line and her perpendicular from analytical geometry: Ax+Bx=0 between segement and points from contour (in code you can use abs(Ax+Bx) < th (th some threshold e.g. 0.5,1.0...).

I use similar algorithm for calculating wire thickness from video, see screenshot . image description

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Asked: 2014-02-11 08:11:40 -0500

Seen: 487 times

Last updated: Feb 13 '14