I've just done something similar with a Object tracking + IR Floodlights and one of VA Imaging's MER2 cameras. We have had some fantastic results with objects sat on these "Interactive Dance Floors" from Alibaba. Didn't even need the IR Absorbing film to get decent tracking results using OpenCV @ 300fps or so.
This sound intriguing. Is the camera placed above the scene? How do those interactive Dance Floors come into play, did you use them for the light? Do they not have triggers, when somebody stands on it?
Yep, we've got the camera mounted vertically above the screen. We use the dance floors to render an interactive Unity game. The pixel density is pretty good. These panels have an array of IR LEDs embedded in them for detection but the density isn't good enough for small objects we want to track. Great for detecting anything the size of a foot or bigger.
