ANPR with HikVision DS-2CD4A26FWD-IZS/P
Answered
Hi, This camera has appeared work without any issue until version 4, or it could be a coincident as its location and was changed around the same time I upgrade to version 4.
It was on a private driveway which got 6 odd reads a day... It is now on a public road outside my property and now gets 50+ reads a day...
The interesting thing I have noted is it fails to read my number plate early in the morning, 5am.
The traffic on the road starts when I leave for work at 5am and the last vehicle would be around 8pm at night. so the camera does nothing for 9 hours until I leave. I don't know how the camera and NX talk to each other but it appears either NX or the camera goes to sleep or the communication between them stops if no number plates are read for a number of hours.
This has happened other times during the night also, it would appear that its about a 3-4 hours window in which they lose communication. the first number plate read appears to wake the communication up and the second number plate is read fine.
Is this a known issue?
Thanks
Grant
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Hi Grant Watson,
There are two options I can imagine.
- The events are scheduled on and off for a certain period of time.
- The conditions are (too) critical during lower light hours (insufficient lighting, slow shutters, too wide angles, etc.) and it isn't capable of capturing during these low light hours. Please check the Installation Guide of Hikvision LPR cameras to check the prerequisites for successful license plate capturing.
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Hi Norman,
Thanks for your reply. The issue is neither of what you have suggested.
1. The event does not get turned off and on.
2. The camera displays the number plate in its live view, so the camera is reading the number plate.
Thanks Grant
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Hi Grant,
Regarding 2; seeing a license plate in the live view isn't a guarantee that the license plate is processed by the cameras. Please check the license plates list in the camera web client to see if it populates when the camera sees a license plate. If that is the case, the license should be available for the Nx Witness VMS.
What exact version of Nx are you using? Have you tried the latest patch (4.2.0.3317)?0 -
Yes already running that version.
Sorry I did not explain myself, the number plate is appearing in the web client of the camera so it is processing it.
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Hi Grant Watson,
Could you add me as an administrator to the system for further investigation?
If so, I'll convert this topic into a support ticket to share information privately.0 -
Yes, happy to add you to the system. if you change it to a support ticket I can include some images from the system showing the camera reading the number plate etc.
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Hi Grant Watson,
Created the ticket on your behalf, please continue the conversation there.
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Unfortunately we weren't able to reproduce the issue locally, although it was attempted at multiple locations with different devices on different systems. Since it wasn't possible, for a good reason, to provide continuous access to the specific device, there is nothing we could resolve at this moment.
If someone encounters a similar issue, and can provide direct access to the camera through port forwarding, we really would like to continue the investigation, so we can resolve the issue.
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I'll sort out remote access to the camera and let you know. this will be in the next day or so.
I find it a bit off that I waited for weeks for you guys to get to this point and I don't respond in a few days and you want to close the fault.
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Hi Grant,
As mention in my reply to the ticket we created; we do not close the vault and reopened the ticket and are awaiting the remote access credentials to continue the investigation.
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The issue was resolved and should be available in the next public 4.2_patch
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