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116 posts

Master Geek

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# 222504 14-Aug-2017 22:04
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This seemed like the best place to post this :)

 

Big brother has it, so why not you too.
Automatic (or automated) license/number-plate recognition (ALPR / ANPR).

 

1. A suitable IP camera
2. Spare computer
3. Internet connection
4. A bit of reading

 

Bam, search able, alert able database of passing cars.

 

The longer version.

 

I have cameras up around my house.
They were not great but enough to see people and stuff.
One day my neighbour got their car stolen at 1130pm.
The thieves parked up outside in view of one of the cameras.
The camera was geared to protecting my property so something on the periphery was not going to look great.
Basically a black blob.
Was disappoint that I could not help this neighbour.
I current work as a security tech so this situation was akin to a doctor that smokes or mechanic that drives a rust bucket.
This would not do.

 

While they were likely using a stolen car on the prowl it still would have been helpful to get a licence plate.
Something for the police to work with.

 

A new camera was setup to watch the road capturing number plates.
Had to work well day and night.
This required some tuning to get right.

 

Then I wondered how far ALPR had come and went looking.
Quite a long way it seemed.

 

Settled on this after looking at various options.
http://www.openalpr.com/
For the home enthusiast it is free.
Got it going pretty good now.
Missing about 1 in 30 reads for some reason.
Still troubleshooting.

 

Cost wise you are not looking at a lot,
A dedicated camera from china, $150
Computer, an old i3 desktop, $100

 

The catch is in the time to mount and tune the system.

 

 

 

Click to see full size

 

Click to see full size

 

Click to see full size

 

Click to see full size

 

Click to see full size

 

Click to see full size


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mdf

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  # 1846748 14-Aug-2017 22:29
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Cool project. Just be aware the Privacy Commission may have something to say, particularly if your cameras aren't obvious and you're collecting / keeping images "you don't need to".


BDFL - Memuneh
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  # 1846755 14-Aug-2017 22:51
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Hmmm. Interesting Privacy Policy:

 

 

Disclosure of Your License Plate Data
We may share your License Plate Data with third parties to provide technical support or to provide specific services, such as hosting of your applications.

 

We may enter into agreements with Partner Companies such as hosting companies or other services providers. A Partner Company may want access to License Plate Data that we collect from its customers. As a result, we may provide your License Plate Data to a Partner Company on a confidential basis in order assist the Partner Company in providing customer support. Because we do not control the privacy practices of our Partner Companies, you should read and understand their privacy policies.

 

OpenALPR may disclose License Plate Data if it believes in good faith that such disclosure is necessary to (a) comply with relevant laws or to respond to subpoenas or warrants served on OpenALPR; or (b) protect or defend the rights or property of OpenALPR or users of the Products or related services.

 

If another company acquires our company or our assets, that company will possess the License Plate Data collected by it and us and will assume the rights and obligations regarding your License Plate Data as described in this Privacy Policy.

 

Except as otherwise stated in this policy, we do not disclose the License Plate Data collected from our services to third parties without consent from you. You expressly consent to the sharing of your License Plate Data as described in this policy.

 





 
 
 
 




116 posts

Master Geek

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  # 1846768 14-Aug-2017 23:14
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Thanks for your concern mdf :)

 

I am not sure what nefarious purpose I could put the collected data to even if I wanted.

 

http://www.aucklandsecuritycameras.com/privacyandcctv.html

Given enough data one could setup something that would learn the normal vehicles.
Flag any new vehicles.
I am sure it exists already. Haven't looked.



freitasm, seems about standard for a cloud service?

 

Any worse than google mining your hosted data?

What they do have is a Plate at a specific time.
They could assume a general location from the IP address.


1074 posts

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  # 1846779 14-Aug-2017 23:57
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  1. Why did you choose a $150 dollar camera?
  2. Any special requirements?

     

       

    1. IR
    2. extra zoom
    3. low light sensitivity
    4. camouflage
    5. Wi-Fi
    6. PoE

     

  3. Your photos mainly seem to capture the plate only and not the occupants. Any reason?

 

Cheers





Please keep this GZ community vibrant by contributing in a constructive & respectful manner.




116 posts

Master Geek

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  # 1846787 15-Aug-2017 06:01
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IcI:

 

     

  1. Why did you choose a $150 dollar camera?
  2. Any special requirements?

     

       

    1. IR
    2. extra zoom
    3. low light sensitivity
    4. camouflage
    5. Wi-Fi
    6. PoE

     

  3. Your photos mainly seem to capture the plate only and not the occupants. Any reason?

 

Cheers

 

 

 

 

This page cover the basics :)

 

http://doc.openalpr.com/camera_placement.html

 

 

 

1. The images are from a cheaper camera I had.
A dedicated one in on hand but yet to be installed.
Click to see full size

2.
-1. Yes
-2. Yes, unless you can mount very close to the road.
-3. Helps. You will need extra illumination for night time. The amount depends on how sensitive the camera already is.
-4. More a mounting technique than a camera feature.
-5. Hardline is always better. A good wifi connection will also work.
-6. Not required.

3. The normal setup is one camera for plates, one for area view.
Capturing car occupants is quite tricky due to reflective of glass.
That is my next challenge.


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  # 1846804 15-Aug-2017 07:40
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Where's your house so I can come test how good it is at reading my plate at 2am through all my burn out smoke lol :)




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  # 1846841 15-Aug-2017 08:35
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Would be good to integrate with: http://www.police.govt.nz/stolenwanted/stolen-vehicles

 

As stolen vehicles = burglars.

 

As far a privacy goes; it's a public place so fair game.


 
 
 
 


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  # 1846843 15-Aug-2017 08:45
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I am assuming the driveway visible in the images is not your own driveway. Be wary of that neighbour's stance. Your camera is placed such that you can, essentially, log every vehicle who visits their property via that driveway. Having had a similar situation with some CCTV we had watching access to a (business) parking area in the past, it was deemed a privacy issue and we were required to re-position the camera so as not to be recording access to the other party's driveway. This was a number of years ago now, so stances may have changed.


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  # 1846891 15-Aug-2017 09:35
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I always thought this would be a cool way to open the front gate. Actually mount the camera and a light in the gate frame at the perfect level and trigger it with a simple infrared beam. Then get it to trigger a relay to open the gate.

 

But reading about that OpenALPR software a while back talks about it taking some time to process a photo. I would run it in a VM on a little home server and can allocate plenty of resource to it. How quick is it with an i3? (assuming an old i3 that was sitting around?)




116 posts

Master Geek

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  # 1846916 15-Aug-2017 10:09
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solutionz:

 

Would be good to integrate with: http://www.police.govt.nz/stolenwanted/stolen-vehicles

 

As stolen vehicles = burglars.

 

As far a privacy goes; it's a public place so fair game.

 

 

 

 

That is worth investigating :)

 

Will do some investigation tonight.




116 posts

Master Geek

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  # 1846917 15-Aug-2017 10:12
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chevrolux:

 

I always thought this would be a cool way to open the front gate. Actually mount the camera and a light in the gate frame at the perfect level and trigger it with a simple infrared beam. Then get it to trigger a relay to open the gate.

 

But reading about that OpenALPR software a while back talks about it taking some time to process a photo. I would run it in a VM on a little home server and can allocate plenty of resource to it. How quick is it with an i3? (assuming an old i3 that was sitting around?)

 

 

 

 

A proper self contained ALPR camera is about us$400 from china. DAHUA

 

It can trigger a relay on matches etc.

 

About to set one up in a new building parking entrance.

 

OpenALPR, for your application we could get the read time down to 0.1-0.2 seconds.




116 posts

Master Geek

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  # 1846918 15-Aug-2017 10:15
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Inphinity:

 

I am assuming the driveway visible in the images is not your own driveway. Be wary of that neighbour's stance. Your camera is placed such that you can, essentially, log every vehicle who visits their property via that driveway. Having had a similar situation with some CCTV we had watching access to a (business) parking area in the past, it was deemed a privacy issue and we were required to re-position the camera so as not to be recording access to the other party's driveway. This was a number of years ago now, so stances may have changed.

 

 

Thanks for for highlighting the potential issue.
Were your cameras being operated by a business?

 

It seems a private individual has a lot more latitude with a CCTV system than a business.

 

Was the advice from a lawyer or some other entity?


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  # 1846936 15-Aug-2017 11:05
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That's a really cool project. Wish I could justify spending money on it myself




116 posts

Master Geek

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  # 1846940 15-Aug-2017 11:10
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coffeebaron: Where's your house so I can come test how good it is at reading my plate at 2am through all my burn out smoke lol :)

 

For you I would break out the drone for some close in action shots ;)




116 posts

Master Geek

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  # 1846942 15-Aug-2017 11:12
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KrazyKid:

 

That's a really cool project. Wish I could justify spending money on it myself

 

 

 

 

If you don't need night time recognition you can get away with a $20 camera :)


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