Detecting concentric circles

HoughCircles

asked 2016-12-08 17:53:42 -0600

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I am trying to find circles in the attached image.

I have used the function cv::HoughCircles(img, circles, cv::HOUGH_GRADIENT, 1, 1);. However, it is unable to detect the circle in this image or other similar images. Can someone point what I may be doing wrong?

image description

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answered 2016-12-09 05:55:21 -0600

pi-null-mezon

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You should decrease the threshold for the circles detection - read this manual

Call function with not default parameters:

cv::HoughCircles(img,_vcircles,CV_HOUGH_GRADIENT,1,1,100,20);

and you will get: image description

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Asked: 2016-12-08 17:53:42 -0600

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Last updated: Dec 09 '16

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