I’ve tried several ROI settings, and have currently settled on 1 to try and capture as much left-right movement as possible.
I have a couple of trees I can’t do much about, and the angle of the camera is the best spot I can get it.
I also have a hedge, which blocks pedestrians on this side of the street, and parked cars that block the other side. Not ideal, but I’m central London and don’t have much choice.
I 'm wondering if it would be better for me to reset the ROI to factory settings, and let Telraam decide on its own? I suppose I could just reset the entire device, bit it seems like it would be helpful to have a “Reset to factory ROI” button on the “Camera Images” screen.
Any suggestions?
This would be my ideal ROI:

Tree on the pavement at the left, overhanging tree on the right, and hedge across the middle of the picture obscures the pedestrians. :-/

Interesting challenge 
Yes, the hedge will obscure some of the pedestrians on this side, but hopefully we can see enough of them that the AI will still recognise them as pedestrians. Cars and bikes on the road should be fine. The view of pedestrians on the far side will be limited, but hopefully they’ll be recognised as they appear from behind the tree and before they disappear behind the next.
We do not have full flexibility on the ROI at this stage, so we need to go with the options available to us.
There’s no need to re-set it. I would suggest you try setting 2 in this case and see how that works.