I got a demo CD from Infosec Show and I would recommend people download the viewer and footage to have a play.
At the show they were showing a clip of a parking lot with a camera covering the car park but also a garage with an open door. It was a bright sunny day so via the analogy camera you could only see the car park but via Avigilon Camera/Software you could see into the dark garage and read the registration number from a car being worked on. You can also manually adjust brightness/contrast on the fly.
This type of thing is important, as is quality of system and installation. If you are going to install it yourself then try a few things first. See what its like during the day
I recently got involved looking at some bad digital CCTV footage.
We own a small part of a larger site, one of our tenants had a car stolen and I went to view the footage from the larger sites CCTV. Our site is great as there is a Canal bridge, which is the only point of vehicular access to the site.
The installer who just so happens to be a tenant too of the larger estate, had installed a camera in a poorly lit area pointing down. When cars went over the bridge and down onto the estate they would brake, all the CCTV would see was big white blobs around where the back of the car should have been. We guessed the thieves’ car to be a Corsa in fact is was a Fiesta. We also did not see the Subaru Estate leave the estate (although it was found 100 miles away!). They had motion detection that somehow either missed the car leaving or it did not record before and after the motion was detected for long enough. This site had lots of cameras, all ip, all allegedly the latest sing and dancing system but none with what I would call a decent picture. The only thing we could confirm was a time and that it was two people.
The power of Avigilon software and cameras is important,, I am sure there are other systems that are good but this was the best I noticed at Infosec. If you are going to install a system then try a few things first. There is no point having a brilliantly clear picture on a sunny (do we get them???) day only to realise that at night someone shines a torch into the camera only to blind it. One of the camera on the site was near a tree, they installed it in winter……..
Sorry for the rant but do try the trial, I am not an expert, I am just an IT Director who has to look after security.