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What does minDistBetweenBlobs actually do?

Hi all, I'm fairly new to OpenCV using C++ and I have a question about minDistBetweenBlobs:

What does this particular parameter actually do?

I was under the impression that it mean that key points would only be accepted if they were within the set minimum distance between it and other key points, but when I set the parameter to a higher value (100), a bunch of key point end up appearing clumped up together.

Thanks in advance!