LPR camera settings

bickford

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Hello everyone

a question for LPR specialists

I have the new DAHUA HFW5231E-Z5
I use it for LPR ; in day mode no problems

but at night motion blurred ... can you help me a little please ?

picture below and settings :
PIC_1492359942_36_2017-04-16-18h17m42s,858333.jpg PIC_1492433418_36_2017-04-17-14h20m46s,585963.jpg PIC_1492433476_36_2017-04-17-01h34m01s,72590.jpg PIC_1492433514_36_2017-04-17-02h10m25s,179269.jpg PIC_1492433586_36_2017-04-17-06h40m35s,457912.jpg DAY SETTINGS.jpg NIGHT SETTINGS.jpg

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cb8

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Your street look very bright at night, or is it all from the IR lights?

When I tested my Z5, I had more success getting sharp images if I lowered the gain further. You can always open up the iris accordingly to compensate. I kept the iris at about 80-90 and it gave me enough DOF that getting the right focus was easy. I had the camera fully zoomed in, shutter speed at 1/1000th, which left everything but the license plate and lights totally dark.
 

bickford

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hello and thanks for the help

Tried with 1/1000 iris 90 gain 0-40 and IR 50%...
waiting for cars :)

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nayr

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You need test plates, at that shutter speed blur wont be an issue.
 
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bickford

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Perhaps i have too much IR LIGHT ...

Yes test plate can be a good way ...

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cb8

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Do you have any IR sources besides the bullet? What about existing light such as street lights?
 

bickford

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Yes i have other cameras but IR sources not in the same direction.
Yes there is street light

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