That example shows exactly what I said about the snow and salt-colored road can be problematic for some vehicles.
That white vehicle blends in well with the surroundings. What are brightness and contrast set to? You probably need to increase the spread between them to make it stick out more.
And I experienced just the opposite of Mike and I needed to lower the FPS.
I noticed that my LPR camera wouldn't trigger in every instance (I knew this because the overview cam triggered and the LPR camera didn't)
So I noticed while watching it live for an extended period that for my license plate camera (which as you know is zoomed in tight to the road to read plates), I watched it not trigger for a big ole yellow school bus, but then trigger for a tiny 2-door car the next minute that was driving slower and then miss the same car coming back 5 minutes later!
For this plate camera, I was obviously running a fast shutter to capture plates, but also had the FPS at 30 FPS thinking that would be better. When I knocked it down to 10 FPS,
Blue Iris motion started capturing that bus and other vehicles it was missing and triggering faster.
I think the motion algorithm for a tight field of view was having difficulty with the faster FPS as there wasn't as much of a difference comparing frame to frame at 30FPS to 10FPS. A vehicle is in and out of my LPR field of view in under 0.5 seconds and I now get trigger alerts and capture every plate at 8FPS (yes I dropped it even further for longer retention of LPR images).
