OK, after a couple of nights watching the video, I think I am pretty much done upgrading my LPR cameras until something better comes on the market. After watching the video, I have been wondering where the dirty plates have gone. Well, they are still there but the contrast is so good that they are now much, much easier to read. The only ones that are still giving me some trouble are the "retro" plates with the orange/yellow lettering on a black background. I think a certain group of those have a paint with very little reflection or have a 750nm number. However, viewing the video from two different cameras I can piece most of those together. There are some without a front plate and I cannot get those unless the car comes by again. Here are a few thoughts on what has worked at my location.
1. Locate the
IR illuminator(s) as close to the camera as possible.
2. The Illuminar IRC99-A60-24 made the biggest difference at my location.
3. The Speco IR60 made a difference and was a nice upgrade from the camera only IR lights, and was the first ones that I bought.
4. After installing the Illuminar units I had the Speco units left over. So, I decided to use those in conjunction with the Illuminar units and IMHO it put me right where I needed to be. Any more IR light and the highly reflective plates would have too much glare to read.
5. The LPR cameras that I am using at my location are the Dahua B5442E-Z4E.