Toilets seats with built in bidets have already been perfected in Japan and South Korea since the nineties. Anyone who suggests the need for computer vision aided complexity has never used one of these. They just work, and you learn to use them properly really fast.

They just want to gather the footage for research

I only used one in Korea once, and to be honest, it worked so well without doing anything special that I assumed they were already using some kind of recognition.

And those toilets have been readily available in the US for over a decade. I did opt for a higher end model, but it wasn't hard to find either.

It's knowing when it's done

I can already see the news reports about racist toilets.

over-engineering much

Better safe than sorry