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Is there a way to detect a circle with a specific grey level using openCV? I want to detect a circle that marks out from the others.
Currently, I’m using cvHoughCircles to detect my circles. I know the method returns an array of cvSeq containing the info on each circle (point and radius), but it does not provide any color information.
Thank you
You should first isolate the colour you want, and then do a houghcircles on that image.
Say you want to find green circles from a bunch of green, red and blue circles. Its simple in this case, just threshold the green channel. You’ll get only the green circle in the thresholded image. Do a sobel/canny on it and execute houghcircles.