Well, you can do some basic things with this but honestly RPi4 is pretty much underpowered CPU for any serious AI. You can run some optimized networks probably

Well, you can do some basic things with this but honestly RPi4 is pretty much underpowered CPU for any serious AI. You can run some optimized networks probably even 200 fps like TinyYOLO linked below but it will always be a tradeoff between accuracy and hardware capabilities. If you want AI you'd better consider Jetson or figure out some other DNN accelerator.