How do I detect the ellipses in the image attached?
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This is a ring type target which I need to auto-detect and number. Currently I am trying to fit ellipse which is failing because I get all four connected components as separate ellipses.
What should be a robust strategy to detect the outer, the inner and the inner most ellipse so as to be able to detect code of the target?
In actual scenario, I will have many more targets like this in a single image, which will appear distorted depending upon the location of viewing camera.
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Image Analyst
on 6 Jul 2013
Use bwconvhull() to get the convex hull of the whole set of objects. That will work better, but not perfect because you're missing a quadrant.
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Image Analyst
on 6 Sep 2013
You can't know the accuracy unless you have some "ground truth." I only told you one method: find the boundary points, then fit it to an ellipse. I don't know what you did after that for your second method. Did you then use poly2mask() to make a binary image and find the centroid with regionprops()?
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