What causes lite up license plates to show as black on B52IR-Z12E-S2

nutsco

n3wb
Dec 24, 2024
2
0
Canada
Ok so I am new to LPR and have been literally reading every single post in this forum before asking questions, I have spent countless hours adjusting the angle, playing with settings that I see on here and just plain trying to get my Z12E-S2 to just "work". Now first off, I am plagued with 2 large problems here, first its winter so I am dealing with a mass amount of dirty plates, 2nd is in my province the plates are not reflective. It has only been the last 2 years where our province changed to reflective plates, that means that 95% of my current captures struggle, but in the midst of all my issues I have a question on why vehicles that I can see have lots of light on their rear license plates, just come out black on my camera.

This vehicle comes by at this is what I see on my camera, the IR is lighting up the 2 corners of the plate, thats where the registration stickers are, which are reflecting.
10.0.0.108_ch_1_20250121_184538.jpg

Now looking at my secondary camera that is overlooking and mounted stuck beside the Z12E, this is the same vehicle:
Driveway-Driveway-20250121_185003.jpg

You would think that at the very least I would see something in the plate, vs all black. For refrence, this is what a reflective plate looks like:
good-plate.jpg

And currently working through my challenge of non-reflective plates as this is the "normal" plate that I get:
average-plate.jpg

Settings wise after hours on this forum, manual focus, backlight off, WB natural, B/W mode, defog off:
settings.jpg
Angle wise, vehicle come up to turn right infront of my property so I go from a slight angle to almost straight on the plate, camera mounted about 10ft off the ground and using 827 on zoom as anymore and it becomes difficult to grab the vehicle as they move out of frame when they turn wide or cut the curb. Any help is greatly appreciated as it happens so often with lighted up license plates!

Thank you!
 
How far away are the vehicles you're trying to capture?

To me it looks like you don't have the IR turned up. I'd personally try 100% and see what that does. Also might try going to 1/1000 on the shutter speed.

There will be people a lot better than myself showing up soon. :)
 
Yep first thing is crank the IR to 100

And if all cars have to turn there and there is not a straight, then they have to slow down enough that a 1/1000 shutter will probably work and between the two could make it work.

And remember we can't get every plate. Someone bends it up slightly or dirty or a they put a cover or film over it can cause it to be missed also.
 
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Thank you, I set the shutter to 1/1000, and cranked the IR to 100 on each, now the waiting game. Also distance wise, it's 60 feet from the camera to the center view.