I just noticed some interesting behavior with lpr... you don't even need to use the license-plate model for it to work!
I noticed my lpr cam having some relatively bad make times, and yesterday I learned about using
alpr:0
in my non-lpr cams. I also noticed how BI logs plates appeared distinct from how it logs makes from license-plate. AI analysis showed ipcam-combined, license-plate, and Plates models being used, and plate numbers were showing attached to all 3 models. That gave me insight to the inner workings of BI ai, and made me think to run the following experiment on my lpr cam.
My lpr normally uses the
ipcam-combined,license-plate
models, with "person,bicycle,car,truck,bus,van,dog,DayPlate,NightPlate" to confirm, and "car,truck,van,DayPlate,Nightplate" marked as vehicles. I changed this to just
ipcam-combined
, with "person,car,truck,bus,van,dog" to confirm, and "car,truck,van" to mark as vehicles. The next thing that drove by got properly marked on the BI alert, and in BI logs! That the plate was read is business as usual, but that it did so in less than half the time due to not having to run license-plate was a fortunate discovery.
Now the problem I can see with this as is, at night time I have noticed that ipcam-combined is not as consistent at marking vehicles vs license-plate marking plates. I already have a day/night schedule change with different trigger zones... night time is currently setup with just
license-plate
, with "DayPlate,NightPlate" for both confirm and mark as vehicle. I am curious which one will turn plates around faster... just license-plate, or just ipcam-combined (guessing license-plate will be faster, but hoping combined is a close second as it's more useful during daytime). I am interested in running an apples to apples experiment and compare data from both day and night for either model. At any rate, this discovery will certainly help my lpr during daytime... I'm also using it to log foot traffic so it needed the help.
[edit: Note the make times are still not that great for a p400 gpu... the reason is self inflicted... a 20' strip of the road shown can trigger 3 models at once time. So when a car drives by ~25mph as expected, and there happens to be reflections in the windows of the cars parked in my drivways (as in this case), I can get up to 3 models plus plates being run simultaneously (lpr+combined+plates, driveway+combined, and driveway clone+delivery). Dealing with this was my main reason for getting the gpu to begin with... but I probably should do some more contrast tuning on the driveway cam.]