Revision history [back]

Conveniently, OpenCV has a Circle Detection function called Hough Circles.

Now, to make it easier on the algorithm, you should remove as many distractions as possible.

• Filter the image so that only blue things remain. (I used Blue-0.5Red-0.5Green)
• Run the circle detection.
• Filter the circles returned, because the center had better be in the Blue.
• It should also be near the geometric center of the blue.

Hopefully this helps.

Conveniently, OpenCV has a Circle Detection function called Hough Circles.

Now, to make it easier on the algorithm, you should remove as many distractions as possible.

• Filter the image so that only blue things remain. (I used Blue-0.5Red-0.5Green)
• Run the circle detection.
• Filter the circles returned, because the center had better be in the Blue.
• It should also be near the geometric center of the blue.

Hopefully this helps.