[peterhalburt33]

I was just about to say, I was slightly disappointed to find that this wasn’t an article about a novel technique to identify fast moving water (akin to the fact that we can identify the temperature water by the sound it makes when it is poured).

[solardev]

It's one of those interesting examples where Hackernews's dual identities conflict... it's half "interesting engineering stuff" and half "startup culture stuff".

In this case, the article's business stuff made my eyes glaze over, lol, but that random thumbnail and metaphor they used was really interesting. I wish I could find the source of that image... unclear if it's just a mockup that NFX made for the blog, or if there's an actual machine vision water flow classification project somewhere.

My Googling is really failing me this time. I can find articles (scholarly or not) on kayaking, water physics, machine vision... but not at the intersection of the above, and not any other instances of that image or lookalikes. Most of the AI projects out there are classifying aerial images from a bird's eye view, at ocean scale, not "how fast is this water that I'm looking at from shore" scale.