Blurred licence plates with Hikvision ANPR camera

[nzoomed]

Have set up a couple of Hikvision iDS-2CD7A45G0/P-IZHSY cameras, there is outside lighting present which potentially is affecting things, it will stay in daylight mode even at night if i leave the exposure high enough, but the plates are not captured well under artificial light.
Having IR on or off seems to make no difference.
Anyway this model differs over their other models with the settings, shutter speed for example has to be within a range preset between minimum and maximum.
See settings below and an example of a captured plate, what frustrates me is I think ive got it right with a clear plate, but then the next vehicle or so goes bad, so then im back to square one.
Ive tried iris mode as Auto but that gave me worse problems.
I ended up going with shutter priority and setting a low iris limit, ive tried various exposures, a faster shutter speed will take away the glare, but make the plate not very clear, or in some cases it still has glare depending on the angle the car is travelling.


Here are some examples with the above settings.

 

[wittaj]

Most of us use Dahua, but a lot of the settings would be similar.

We only need 1/2000 shutter and get clean captures.

It looks like because you picked shutter priority, the camera has cranked gain up to 100 and is likely causing your issues. Change to manual shutter or whichever one lets you adjust gain as well. Make gain 45

What are your other settings like brightness, contrast, etc. Those typically need to be lower to capture plates.

 

[Flintstone61]

 

[nzoomed]

Most of us use Dahua, but a lot of the settings would be similar.

We only need 1/2000 shutter and get clean captures.

It looks like because you picked shutter priority, the camera has cranked gain up to 100 and is likely causing your issues. Change to manual shutter or whichever one lets you adjust gain as well. Make gain 45

What are your other settings like brightness, contrast, etc. Those typically need to be lower to capture plates.

On one of my other cameras ive found that the most optimum shutter is 1/1000 or 1/2000 but have gotten away with 1/250 before, I found that using the night preset was the most critical thing to get things right first and then tweak shutter accordingly.
Lighting seems to be the main outside factor that affects things the most from place to place.
Ive left contrast and saturation all at 50%, typically i never have messed around with this.



Shutter priority and fixed lets me select a shutter speed, 1/1750 or 1/2500 are the closest options to 1/2000 on this model.


Have not tried out fixed yet, but have no idea how many f stops I should use?


Ive also just looked at white balance and wonder if this may affect things too?
There is outdoor lighting here, i think its possibly LED, but not too sure.
Its still set to auto.


But as far as gain settings go, I dont see any option visible no matter what iris mode I have selected, this option is present on the other models with shorter focal length, but not this one.
I can probably get a screenshot of that model for comparison.
Would noise reduction have any bearing on this?

 

[nzoomed]

So I played around last night and thought I had it sorted, but then after a few vehicles passing and the subsequent plates come in worse.
See screenshots of settings below, the main things I changed this time round were the contrast and brightness.