(1)just checked a sling-stone is roughly 4 pixels at ~38m with 4k from a smartphone and also 4 pixels @ 100m with FHD and 6x optical zoom so tracking flight just with smartphone lens and no optical zoom is impossible now.
(2) might be possible with machine learning although I dont understand a lot about it. I think it will confuse insects with stones.
Curious Aardvark wrote on Jan 11
th, 2021 at 6:44am:
it would make more sense to use a cheap 'action cam' for the target spotting.
good idea but I think it complicates things, the action cam(extra $) will need to send the video to a smartphone for the analysis and there will be image deformation if the action cam is too close to the target.
Curious Aardvark wrote on Jan 11
th, 2021 at 6:44am:
Were you to use day-glo missiles that would make trajectory tracking easier.
Or a set of night vision goggles, an infra red illuminator and some reflective ir paint on the missile.
the idea was to reduce time and costs and just do it with software. There are tiny-projectile radars out there but they are crazy expensive. Golf ball flight tracker 20k$
https://www.youtube.com/watch?v=ycWo0Ehj4Lo