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I can confirm that FishPlaysPokemon uses OpenCV. There's a wealth of knowledge and tutorials, so if you just want to isolate certain color ranges (what they're doing), I guarantee there are tons of resources. There's also Python bindings to make things even more friendly. After that, it's some simple math to figure out which quadrant it's in and then trigger the correct button press.

Hm, good call, thanks for that. Looks like there's a binding for Nodejs out there too: https://github.com/peterbraden/node-opencv

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