LPR setup help

Ok, potentially dumb question, but... lol..

I have the 5-60mm lens, and am debating getting the z4 8-32. If I wanted to get a ball park estimate on what the 8-32mm lens would look like by using my z2 5-60mm, what would I set the zoom at? Say the 5-60 goes from 0-2000, would it be somewhere around 900, or?

I'd really like to get an estimate rather than just buying a z4 out of the blue. I could definitely use it for yard/sidewalk faces, but...

Thanks
 
Use this:

Focal Length Calculator

Calculate the focal point of a camera to help determine the best size lens to order. Save & view your results later.
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From my experience with both, I'd say the Z4 zooms in roughly about 1/2 of what the Z12 does. BUT, the 1/1.8 CMOS on the Z4 picks up the plates in a readable way, further away and in a more forgiving manner than then the z12 i had in place.
Which the allows me to see the whole vehicle and the plate during the daylight hours. Whereas a fully zoomed Z12 in my experience needs to be relegated to 1 job to succeed in its mission. And it really shouldn't be asked to do double duty.
Your mileage may Vary.
 
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Purchased a 608XI NVR and really like it so far. Allows me to capture plates with older cams using the NVR AI, which is pretty cool.
Thinking on getting a 7 series camera for face captures, and getting license plates in the background.
 
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I have a mini ptz that because of location, gets 95%+ plate capture. It would be cool to be able to do ANPR with it… hmmm
 
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Hey guys, what does everyone use to capture the plates when configuring under "events", for the older 5241? Tripwire, or ?? I put up and old 5241 back up to capture plates in IR for one spot, and for the love of me I can't remember how I was capturing at night.

Thanks much!
 
Usually because of very low light, I use old fashioned MD. I single straight line of blocks
 
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bigredfish said:
Usually because of very low light, I use old fashioned MD. I single straight line of blocks
Click to expand...
Yeah, I'm trying MD, and for some reason I'm not capturing a lot of the vehicles, though that is with attempting to use the NVR for AI video data plate capture.
I'm thinking the older cams don't work at night with the plate capture. Not a huge deal. I can always go back and search manually.

It's only temporary as well. I'm planning on grabbing a 7 series cam, and then decide whether to grab a new 5-60mm version cam, or grab a dedicated ANPR.
 
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bigredfish said:
I have a mini ptz that because of location, gets 95%+ plate capture. It would be cool to be able to do ANPR with it… hmmm
Click to expand...

What model are you using and would you mind sharing your settings? Trying to do something similar with mini PTZ (PTZ425DB-AT) I got from Andy.


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Same 4MP mini ptz dome

I have an ideal almost cheating scene/location. Vehicles 20mph tops, have to make a corner. Camera only 25-30 ft from capture points.
I use two cams on either side of the house that double as spotters to direct the ptz.

Night settings. Weak streetlight at very corner so that helps the cam get a focus at night. Daytime is stupid easy

miniptz-2.jpegminiptz-1.jpegminiptz-5.jpegminiptz-4.jpegminiptz-3.jpeg
 
Last edited:
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The trick is not to zoom to tight because at night it will tend to lose focus if you do. But it works great mostly due to the scene distances and slow moving vehicles
 
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bigredfish said:
The trick is not to zoom to tight because at night it will tend to lose focus if you do. But it works great mostly due to the scene distances and slow moving vehicles
Click to expand...

Really appreciate all the insight. I’ve been dialing in auto tracking for a culdesac scene though, this looks to be the much better/reliable setup. Going to tinker with a bullet as a spotter to work with my mini ptz. Slow traffic in this culdesac to where I’m thinking I can get similar results to what you have shown.


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Yeah you’re not going to get consistent results using auto track for plates. You need to have it focused for a couple of seconds in a static preset.

The spotter function is actually done through the NVR. There’s a thread around here somewhere…

Basically set your LPR preset on the ptz separate from any others, set a rule on the spotter specifically to call the ptz, go to the NVR IVS rules for the spotter cam, find the rule you want to command the ptz, and there’s a button that says something like ptz activation. In the popup from that button you assign rule# X on spotter to activate preset #X on the ptz
 
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I changed the angle of my 5241 to cover the T-intersection. I didn't have a camera set for that direction before, considering one of my cameras from left or right would capture the plate. But, this is kind of nice to have since it is also picking up face captures in the vehicle, and face captures from people walking on the sidewalk, during the day. At night I'm just grabbing plates.

One thing about this 608XI NVR, or any NVR with external POE. How does one know how many watts a camera is using? I'm using a Trendnet POE, so I don't see a way to grab information from it, and I don't see anywhere in the NVR. Unless I'm completely missing it?
 
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Yeah that’s what I do, faces, people, and plates during the day, plates only at night.

Not sure how you would know on watts unless it’s a managed switch with that data ?
 
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