Line Crossing Detection Intermittently Failing at Night

C

carphone

n3wb
Apr 26, 2020
16
10
UK
Hi All

I am still a newbie at much of this but have been fine tuning my settings as best I can. I recently noticed that my line crossing detection was not being tripped for some vehicles at night. I would say it works 75% of the time at night and is perfect in the day time.

Check out the video to see what I mean (you will see the line does not go red):


First thoughts are the headlights are giving the algorithm a hard time. Are there any settings that would improve this? Or maybe if i upgrade to an I series NVR it will have more processing power (currently using a 4CH K series)?

Camera is a 4MP ColorVu - both Camera and NVR on the latest software.

Thanks as always!

Dan
 
thanks for the quick replies.

Settings in pic

thanks again

Dan
 

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just logged into the camera to check this (rather than the NVR).

I have not played with these settings - do they look OK?

Thanks again

Dan
 

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As I have not set a min and max before and its not clear what the defaults are - I have just drawn the biggest possible box for max and a tiny square for min.

Will see how this goes.

On a side question - do we think an I series NVR would do a better job than the K series on this? Thinking faster processor and version 4 software might help..?

Thanks again

Dan
 
Update - still happening even though I added my own min and max boxes.

I am going to try switching to H264 as an experiment, I worry 265 is too processor intensive and so causes this issue. Will let you know if that works.

Failing that - will try an I series NVR rather than K.

Thanks
 
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