Video analytics to detect fighting and collapsing

I know there are "downing" cameras, they monitor pools for people who don't seem to be moving any longer or are panicking. I'm not sure about fighting or other distress, nor how good it would be because it seems likely to false positive. Someone tripping might trigger it, someone going to tie their shoe quickly could. Fighting could be troublesome in certain places, but in others could probably be detected easily.
I know there is research on it but I'm not sure about actual software, but lots of good references in the documents below.
www.cs.cmu.edu/~rahuls/pub/caip2011-rahuls.pdf¿
http://www.iis.ee.ic.ac.uk/~tkkim/doc/VISAPP2014.pdf
http://www.nctr.usf.edu/pdf/77807.pdf 2009 study of such software in "Transit" facilities.
http://www.nctr.usf.edu/pdf/77807.pdf
-rich

Yes, but you better have millions of dollars budgeted to productize it for civilian use.  If you don't then just forget it. What you ask for takes a heck of a lot of horsepower and the software isn't available commercially.

>>Is there any robust video analytic solution on the market out there to detect people collapsing and fighting?

Simple and reliable (and probably cheapest as well with current level of technology) - a person monitoring the camera feed.

agreed with Andy -- put it this way, a supercomputer and software costing millions of dollars isn't any better at telling the difference between pictures of cats and dogs than a 3-year old child.

Not according to the studies I've linked/read, it's getting closer and some software does exist for the fighting aspect, but like I said it's prone to missing and or misidentifying. It's just not widely pursued. The same thing with the drowning cameras we have at our local pools, they only have to really look at someone doing a "dead-mans float" to false positive. But you'd rather have that alert than not if it's being missed. As long as the FP's aren't too high, the technology and cost could be reasonable, however you have to think that stabbing or shooting would be missed by such tech unless it sees a melee first.

-rich

Stationary people are one thing, fighting is very different.