The author is saying "wide angle lens" but means what people would conventionally call a "fish eye lens." Normally when someone says wide angle, it's still assumed to be a rectilinear image projection, same as what you get with 3D game rendering. And if you're talking about a curvy fisheye projection, you specify that.
The iPhone's ultrawide lens is a good example of a rectilinear projection with lots of example photos available.
It can produce weird feeling images with stuff at the edges looking stretched out, and parallel lines being at significant angles to each other, but it does not make straight lines curved like the effect that the author is removing.
The iPhone's ultrawide lens is a good example of a rectilinear projection with lots of example photos available.
It can produce weird feeling images with stuff at the edges looking stretched out, and parallel lines being at significant angles to each other, but it does not make straight lines curved like the effect that the author is removing.
Example ultrawide photo with straight lines from reddit https://www.reddit.com/r/iPhoneography/comments/ena7s5/bosto...