[Python] How can I detect the circle/Ellipses in this image using python and Computer vision?

I have an image of a dartboard and managed to remove a lot of noise and highlight the frame of the dartboard. I am able to get the lines in the images using edge detection, but struggling to highlight the circles.

I have tried the following

• Houghcircle detection- generated many circles and most of them not correct
• Corner detection (goodFeaturesToTrack)- Due to the noise there are many corners detected but most of them are not correct

Does anyone have any suggestions?



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