Note that the first image is an interactive demo. Click or touch it. (It's not obvious from the text at the time of writing)
Same goes for a few of the other images too, but not all of them.
The article would probably benefit from having figure captions below each image stating whether the image is interactive or not.
Or alternatively to figure captions about interactivity, showing some kind of symbol in one of the corners of each of the ones that are interactive. In that case, the intro should also mention that symbol and what it means before any images that have that symbol on it.
The demo at the top has some bad noise issues when the light is in small gaps, at least on my phone (which I don't think the article acknowledges).
The demo at the end has bad banding issues (which the article does acknowledge).
It seems like a cheat-ish improvement to both of these would be a blur applied at the end.