[jitter] Re: Motion Tracking | Matrix Scanning

and for your second issue, jit.3m is your friend. it will give you the mean value for your black & white tracking video matrix (which will presumably rise as more people are in the room).  OR, if you are using a cv.jit.blobs object you could run the cv.jit.label object into a jit.3m and watch the max value to see how many blobs the camera sees.

good luck