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That's not the same thing as those are photos with perspective distortion.

Presumably they scale the photo to the actual measured dimension though, so at worst it will make the car look a bit weird.

Interesting point. They need to photograph them with slit-scan photography.

haha, I see you recognized me from my line scan photography work. But unfortunately that only gets rid of perspective in one axis but not the other.

Probably just taking photos with a really long telephoto lens would be good.

In theory, you'd use a telecentric lens [1], but then the lens would need to be bigger than the subject, which is not super feasible for a car-sized subject. I guess for line scan, the telecentric lens just needs to cover a small vertical strip of the car so it just needs to be really tall.

[1] https://en.wikipedia.org/wiki/Telecentric_lens

Haha, I didn't recognize your username, but now I look at your blog it was your work I was thinking of :)

Well, that screws my idea then. Best to just 3D scan the cars and model them in 3D with no perspective then!

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