IPC-HFW5231E-Z12 LPR from 137 feet
- Thread starter crc2004
- Start date
Hope this isn't a derail.. I want to add this camera but my angle to the street would be pretty severe.. maybe 60-75 degrees, there's a big tree that would block my ability to get this down. My house is at the end of a dead-end circle but the set back is between 40-100 feet depending on the corner of the house. The angle of the house wrt to the road also limits the ability to get a clean head on shot. How likely is this to be an issue for LPR? I'm going to get a bullet to be able to see the cars coming into my cul-de-sac just want to know if LPR is out of the question, or what.
TLDR:
Distance to street 125ft, angle from license plate ~60-75 degrees, LPR challenging or just right out?
TLDR:
Distance to street 125ft, angle from license plate ~60-75 degrees, LPR challenging or just right out?
bigredfish
Known around here
Very challenging in my experience. You’ll fight it constantly.
Any option on laying wire closer to the street and mounting on a tree or installing a birdhouse?
Birdhouse LPR with the HFW5241E-Z12E
Any option on laying wire closer to the street and mounting on a tree or installing a birdhouse?
Birdhouse LPR with the HFW5241E-Z12E
Appreciate the honesty. Actually, if I pulled along side the local Telco in their pull pipe from the street I could mount near there, but I'd need to get into their box, and it'd be pretty out in the open.
Maybe car id alone is good enough and at that point drop down to the 5 vs 12
bigredfish
Known around here
I don’t want to suggest it’s impossible, but I manage 4 LPR cams and fought one that was 40+ degree angle of attack a lot. Sure I had times I’d get good plates, but between IR, speed of vehicle, sun glare etc, it was a constant struggle.
I’ve since moved that cam to a location with 25 degree offset and much better reliable captures.
I’ve since moved that cam to a location with 25 degree offset and much better reliable captures.
This will probably be an impossible feat. Did I mention my house also sits about 10 feet above street level, and this would be 15 feet high? Maybe I'll get up there on a ladder and see if I can see over the tree I'm concerned about for a more direct angle. This will probably be ~ 150+ ft
@blazin912 - you would be surprised how much angle where you can still read a plate - see this thread! 150 feet if it would be a straighter shot is doable with the Z12.
ipcamtalk.com
Rave to OpenALPR - A World Record?
We are always talking about angles, the best angles to get plate captures etc. I think I must have captured the world record, well it was actually OpeanALPR that did it. Take a look at this - it did get the number correct. Using your human eyes take a guess at the plate number.
bigredfish
Known around here
Park a car in the position you hope to get a shot. Take a picture of the plate area with a DSLR from under your prospective position. That image will give you the foreshortened visualization of the plate. Send that image to Plate Recognizer and see if it can decode it. It is free to try. If you can't get a telephoto shot, then move closer but in the same path until you get a good amount of pixels but the same foreshortened view.
platerecognizer.com
Automatic License Plate Recognition - High Accuracy ALPR
Accurate, fast Automatic License Plate Recognition (ALPR) software. Works in dark, blurry images. Includes Vehicle Make, Model, Color.
platerecognizer.com
Good call.. the cams ordered as I'll want better visibility to cars coming/going but at least I can run a testPark a car in the position you hope to get a shot. Take a picture of the plate area with a DSLR from under your prospective position. That image will give you the foreshortened visualization of the plate. Send that image to Plate Recognizer and see if it can decode it. It is free to try.
Automatic License Plate Recognition - High Accuracy ALPR
Accurate, fast Automatic License Plate Recognition (ALPR) software. Works in dark, blurry images. Includes Vehicle Make, Model, Color.
bigbadw
Getting the hang of it
- Sep 16, 2014
- 203
- 42
My recommendation is to do what I ended up doing. I went to an LPC (license plate capture) method, and bypassed the LPR because of the challenges you commented on. Now, my cameras do capture a very readable picture (by a person, not the automated software).
The recommendation from "samplenhold" is the same way I tested mine out until I got it right. Get a lens with the distance you need.
The recommendation from "samplenhold" is the same way I tested mine out until I got it right. Get a lens with the distance you need.
I installed my HFW5241E-Z12E and have been tweaking it for a few days - I love it. I get the occasional car with no front plate even though front and back are required in Texas, but this car came by twice the other night. I'm curious if you guys encounter this sometimes. This is the rear and ii looks black or blank. Could it be some sort of plastic over the plate or led lights around the plate defeating the IR? All the other plate captures were good.
Parley
Known around here
Can't say that I have ran across that scenario. However I can have difficulty with older dirty plates. Sometimes I have to go frame by frame in order to get the whole plate number.
bigredfish
Known around here
That sure looks like No plate, but at 1/2000 paper plates disappear also....
bigredfish
Known around here
FWIW to others, I've recently changed my setting on my primary HOA Entrance LPR cam. I was continually having problems with focus changing having tried quite a few tricks.
I've dropped back to 1/1000 vs 1/2000 and so far, two weeks, I'm getting much better reads and less focus issues.
YMMV
Last few days examples (Approx 95ft and 25 degree angle)
I've dropped back to 1/1000 vs 1/2000 and so far, two weeks, I'm getting much better reads and less focus issues.
YMMV
Last few days examples (Approx 95ft and 25 degree angle)
bigredfish
Known around here
Also note that it doesn’t get talked about much but the Iris setting can play a big part in brightness of the image. A little goes a long way, make small adjustments and confirm
I've noticed that option and wondered about it. I've left it alone but I need to read about the iris setting. Here's one of mine from last night. I believe this is around 80 - 85 feet. I need to save screenshots of my options once I finalize things so I will have some sort of record in case I ever have to start from scratch.
bigredfish
Known around here
Hard to beat that snap. You have a pretty straight on angle which helps tremendously
