Extracting circles in an image.

I've found several codes regarding on how to find circles in an image. We also have edited it in a way that we can extract the circle out of an image but only on a grayscaled image. But we need to extract the circle in an RGB image so is there a way to do that? Or any codes in the internet where we can start?

Answer 1

[Image Analyst]

Convert the image to hsv with rgb2hsv. Then use imfindcircles on the h channel:

hsv = rgb2hsv(rgbImage);
h = hsv(:,:,1);
[centers, radii, metric] = imfindcircles(h);
viscircles(................