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Blob detector issue

Hello, I am trying to use SimpleBlobDetector with only one of its params; filterByCircularity. But it alone doesn't seems to detect even a perfect circle. I have tried it with the min and maximum range but that also does not helps. If I use filter by area in combination with it, it seems to work; because of the area filters i think.

Can you plz tell me the default values of min and maximum circularity?

Also has anyone tried using filterByCircularity alone? I was having a similar problem when using filterByColor as well.

params.filterByCircularity = true; params.minCircularity = 0.0; params.maxCircularity = 1;

Regards Saher Maqsood