Summing up what we are seeing:
1) Tripwire / aka cross line detection is what we have seen the most successfully implemented. I bet successful object left behind implementations exist, but they are rare. If you set a short alert period on objects, you'll get lots of nuisance alerts, if you see a long period, it's too late for the exceedingly rare real threat.
2) Analytics are typically being used for pro-active monitoring because that is where the big value is (i.e., in stopping things right away) rather than documenting disasters. There are a handful of companies specializing in analytics for forensic (like 3VR and Briefcam).
3) Display is driven by what the operator set up. If there is a command center with a dedicated operator, it's probably a pop up or new entry in a list of alarms.
4) False positives are all over the place. Systems that are acceptable / tolerated typically do not have more than 1 false alarm per camera per day. Bad systems can have multiple ones per hour, depending on the time of day, weather, setup of systems, etc. (just ask the White House)
Related: Market Guide and Favorite Video Analytics 2014 has survey results / statistics on usage.
I'll answer to number 4), analytics still have problems with flashes of light, whether from street lamps or lightning, reflections off rain, and bugs that fly in front of cameras during certain seasons (white or IR light, try to keep it at a distance from the camera itself). If the scene is steady and weather clear, you get what I can 80% accuracy. We use VMS native analytics as 3rd party solutions still haven't made integrations that easy. Avigilon’s Rialto seems to have the best idea but haven't tested it yet.
We have done a variety of analytics indoors and outside with thermal and optical cameras. This has all been done for live viewing to assit operators in recogignizing certain situations. In essence a viewing aid. The best advice is don't commit to any manufacture/ technology with out a live demo in the situation you are trying to use it in. Everybody has an opinion on what is acceptable but only you the customer can make that determination. Its virtually impossible to not have some sort of false trip at some time while still detecting what you need, its a balance.
We have used a variety of technologies and manufactures for analytics to give the customer what solution they are looking for. Pop ups, flashing lights, alarm messages, emails, texts, integration into lighting systems its all been done. This may not be the answer s your looking for but I feel its honest gien the question, With unlimited budget and time anything is possible.
The primary challenge with analytics is the deployment and configuration of the rules based systems out there. As an integrator we have deployed and watched several systems fall flat on their faces in terms of functionality and ease of use. A year back we tested a fully automated product. It was literally a plug and play type system with minimal configuration and already comes integrated into the Milestone interface. The plus side it would pick up anything it considered to be an anomaly from the norm of activities in front of that camera. The downside you couldn't write specific rules to certain scenes. We installed a unit and had it running across 100 cameras and the false alarm rates were very low. The surprising thing was over 98% of the events that popped up, were in fact relevant to the operators. Name of the product, Icetana from Australia.
I'm not familiar with the capabilities of BRS so unfortunately cannot comment. But as an analytics sceptic since 2007, and having toyed with different systems including Iomniscient, Delopt, Allgo Vision, and ISS, we have settled to proposing only Ipsotek (UK) and iCetana (Australia) to our customers sometimes in combination. Mostly because Ipsotek is rules based and iCetana automated.
Frankly to date we still treat analytics as a value add to the overall security infrastructures we deploy. If you are interested in knowing more about iCetana, I can put you directly in touch with their Australian sales rep. I'm sure they would be happy to provide you with a demo unit for trial purposes. We have deployed their server on 3 different sites to date, and on all 3 sites (2 hotels, and a car dealership) it has performed.
The real question which I suspect is impossible to answer is "What is the system missing whilst analyzing the video streams?" I can only pass judgement on the alerts received of which most have some relevance to security and operations.
Luis it is impossible for anyone to really give you a statistic on what these systems are missing, unless you sit in front of the recorded video and do a manual viewing of hours of video and note what you deem as important, versus what the system was programmed to pick up. On the flip side today we had an interesting meeting with the guys from Ganetec. They basically have a different concept to anyone we seem to have come across. They are in essence a Analytics platform that is fully integrated with Milestone. On this platform they take modules from various different analytics providers based on the particular feature strength that provider is known for. So they aren't an analytics provider but rather a platform. Has anyone used them or have any comments regarding this approach?