People tracking with combined line crossing
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Hello,
We are looking for a solution to the following problem and hope that you can name an NX partner who can help us.
An alarm should be triggered if a person crosses 2 lines in succession (A & C), but only if the same person does not cross another, 3rd line (B) in between.
So A to C results in an alarm. A to B to C does not trigger an alarm.
Does anyone have any ideas?
Thank you very much!
Greetings
J.M.
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Interesting scenario, but doable in specific circumstances.
- This would only work with 1 person in the ABC zone at any time.
- Each ABC event needs to be diguishable by nx, either by 3 cameras or a single camera where each linecross event is individually distinguished. For example;
Although a Hikvision camera has multiple lincrossing feature, in Nx-Hik-Plugin all are treated as a line crossing event & no line #1,2,3 metadata is passed (from what I can tell).
VCA camera does pass metadata that the Nx rule engine can distinguish {caption,description}. DW can likely do the same.
Using the nx rules engine & Nx API, we create rules for each ABC event.
A = enable B, enable C
B = enable A, disable C
C = sound alarm, enable A, disable BWith this logic C will only alarm if B is not crossed after A ;-)
Choosing a partner depends where in the world you are, but the products listed above can will direct you.
This post somewhat explains how to enable / disable rules via API.
https://support.networkoptix.com/hc/en-us/community/posts/17844491788695-Enable-Disable-Mobile-notification-rule-via-API-issue -
Hello Andrew,
thanks for your reply and good idea! I think it could definitely work with the rules engine from NX here.
Unfortunately, however, your first condition is not met. There are numerous people in the area (approx. 10-20 people), so that each individual person must first be tagged by the system and then checked to see whether the specified rules are being adhered to by each person.
I'm not sure which system or solution can be used to tag around 20 people at the same time and track whether they comply with the movement rules. -
Tough ask Jean-Mark.
If the target becomes obscured, they would likley become a new target, and I'm thinking all you targets are wearing the same "safety" gear which makes id or re-identifing the target incredibly difficult.
The Hailo chip is one of a few working with Re-id, and my friends @ AOL work with the Hailo chip.
The logic would be something like each target acheives a "score" for each ABC.
Converting the ABC to binary 101 (5) = fail, 111 (7) = pass.For your scenario, have you considered a "badging" technology using wristband fobs? Then use video verification on the exception report.
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In that case, reach out to VCA or AOL.
You should anticipate custom developement with some logic as defined above.
For these situations I find it best to ballpark price the solution to the customer first before going very far.
I would suggest $5-10k USD for the developement of the logic & notification / reporting is not unreasonable.Best of luck,
Andrew
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