Having imfindcircles not to detect arc in an image

Hi all,

I have been trying to find only circles in my images, but often imfindcircles would detect arc and aggregation of circle like the image below. Please let me know if there is away to work around it.

[Sahil Jain]

Since all the aggregated circles detected have a rather large radius, you can try reducing the maximum limit of the "radiusRange" parameter of the "imfindcircles" function.

Answer 1

[Jayanti]

Hi,

Please refer to the below code which can detect circles for the provided image:

I=imread('your_file');
[centers, radii] = imfindcircles(I,[1 60],'ObjectPolarity','bright');
imshow(I)
viscircles(centers, radii,'EdgeColor','b');

I have set the radius range to [1, 60] to capture smaller-sized circles that are present in the image. Set the object polarity to “bright” as the circular object is brighter compared to the background of the image. With these settings, “imfindcircles” is able to detect the circles effectively.