Detect concentric empty rough circles
Hello,
I want to be able to detect and draw a square around some circles. These circles are taken with a camera so depending of the angle of view and the distance, the radius vary and they can be deformed.Here are two examples: First example and Second example.
The last thing I have tried is using the CircularHough_Grd function from Tao Peng but it finds circles that are tangent of the sought circles: Result with CircularHough_Grd. And I am not sure how resistant this function is to deformation.
Any suggestion would be welcome as I am running a bit out of ideas at the moment.
Cheers.
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Your links are broken. Let me see if I can upload one from my hard drive from the image icon and see if the link it inserts is broken.
![](/matlabcentral/answers/uploaded_files/10453/It's%20not%20a%20bug%20-%20it's%20a%20feature.bmp)
It seems I can insert one. Please try again.
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