Rekor recording plate more than once

C

CamCrazy

Pulling my weight
Aug 23, 2017
522
202
UK
OK, good problem to have I know :lol: but on a section of road that my camera is looking down I am getting plates recorded 2-3 times rather than just once. The camera will grab maybe 30-40 frames, I played with the stickiness settings and looked a park car settings in Rekor. Just wondered if others had come across this and found a suitable solution in settings. If I mask areas I can reduce and almost eliminate this to a degree, this means missing maybe a taller vehicle which might have the plate mounted higher up.

Like I say it's not really a big deal, just puts the figures for the day out of whack, and makes it look like a vehicle has been around more.
 
Without seeing the scene is tough to troubleshoot. I don't have this issue but cars are only in my FOV for less than a second. I have a very tight corridor they have to pass through:
3MA9T4W4589NVG27S28IHI7ZF665RF0U1B3BVZF0-254963574-1636054548591.jpg

Sounds like Openalpr is losing the car and they regaining it again. May want to email Rekor and ask as I've not experienced it before.
 
I think they have been messing with things as I never had that problem and now it is doing that same thing. And my other LPR I had a mask on and it started missing 2/3rds of the plates.

As you can see, this is not a crazy mask, but as soon as I deleted it, the camera started picking up every car again.


1636114901616.png
 
OK, interesting, I can mask to work around it, I did ping them an email to see if they have a magic setting to change somewhere. My camera looks directly down the road at around 2.5 metres/8 feet off the ground, basically just out of reach from the ground so quite low. Perfect line of sight for the job but it does catch a lot of frames.
 
biggen said:
Without seeing the scene is tough to troubleshoot. I don't have this issue but cars are only in my FOV for less than a second. I have a very tight corridor they have to pass through:
View attachment 107409

Sounds like Openalpr is losing the car and they regaining it again. May want to email Rekor and ask as I've not experienced it before.
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Indeed, with a FOV like yours it won't be a problem, I have almost set mine up too well on this occasion :lmao: I decided this time I would place it as best I could - it looks at the cars almost head on at around 2.5 metres or 8 feet from the ground. Still, a good problem to have but maybe Rekor will have some ideas, I emailed them earlier.
 
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I would encourage you to set the mask up and then watch it for a bit and make sure it is recording plates.

My screenshot above, I had 5 vehicles go by and it didn't pick one up - the one you see thought it didn't have a plate, but the other cars went right through it. I turned on all the features and showed that it found motion, found the plate, but didn't log the plate.
 
wittaj said:
I would encourage you to set the mask up and then watch it for a bit and make sure it is recording plates.

My screenshot above, I had 5 vehicles go by and it didn't pick one up - the one you see thought it didn't have a plate, but the other cars went right through it. I turned on all the features and showed that it found motion, found the plate, but didn't log the plate.
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Thanks, the mask does help, I just need to be careful since the mask is not only for motion but literally dictates when it stops tracking the plate :wtf:

We could almost use a motion mask and a separate activation/read mask.

On a side note, Rekor's ability to grab plates day or night is quite impressive, amazing in some cases!
 
Mine is aimed just before a stop sign. Occasionally folks stop before the stop sign, I guess to check their phone, clean the car, I don't know, and wait for 10+ seconds. It will get a second plate when they start moving again. This is a one way street aimed in the direction of travel, so I am getting the back end of the cars.
 
CamCrazy said:
Thanks, the mask does help, I just need to be careful since the mask is not only for motion but literally dictates when it stops tracking the plate :wtf:

We could almost use a motion mask and a separate activation/read mask.

On a side note, Rekor's ability to grab plates day or night is quite impressive, amazing in some cases!
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It does have an option to include an inclusion mask.

Hopefully they get back to you and say something like they changed the algorithm and we just need to change a number in the agent to stop that. Because I am getting parked cars now way more than I ever did.
 
Have you both tried adjusting the parked car setting in Rekor? in theory that is designed I assume to eliminate issues at stop signs, lights etc. Although I think getting a plate twice is better than none at all of course, tough one really.
 
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It has worked fine before, so I think they changed something but haven't rolled out the new parameter settings, so like you said I would rather have twice than none at all, so I haven't played with it.
 
wittaj said:
It has worked fine before, so I think they changed something but haven't rolled out the new parameter settings, so like you said I would rather have twice than none at all, so I haven't played with it.
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Fair comment, I will let you know if they tell me anything useful via email, does sound a bit odd though no doubt.
 
Where is this "parked car" setting you guys are talking about? Running the Ubuntu agent.
 
biggen said:
I don't have any GUI for agent since it's the Linux version. Its all CLI/config file driven. I'm guessing that could be put in my alprd.conf file though... I'll have to read through the docs.
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That is correct I believe, is this finally a plus point for Windows based Rekor :lmao::lmao: we have to take what we can you know :thumb:
 
I think the parked car settings might only be good for literally parked cars, the stickiness setting could be more relevant...maybe?
 
I haven't noticed any missing plates, but thanks for making me sit and watch for every car that goes by for a good few hours, really look forward to it :thumb:
 
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I noticed in 5 minutes after I realized that my one camera was missing a lot of plates.

Between the two cameras, the split is fairly even of the total and they were off a lot, so I started investigating.
 
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