@kotaro I started off, innocently enough, with $20 cams (which are immensely powerful now) to build a "garden cam" for my lovely wife using an open source surveillance (boo!) package "Frigate".
It started recognizing stuff so I kept giving it more and more mem and compute power and I concluded I was onto something.
Now I need to take a more structured approach including OpenCV.
I have the tag line already: "Helpful, not Creepy".