Can someone explain BinaryImage?

[pureFloat]

I've been looking at a lot of threads having to do with tracking the hoops, and most of them involve converting the camera's image to a BinaryImage type. What exactly is this? Does it make all bright colors trues and all dark colors false? Also, can someone please explain what a ParticleAnalysisReport object does? That seems to be what the majority of the methods for BinaryImage return. I've read through this, but I can't understand everything for the above reasons.

Thank you for any help!