[pja]

This paper suggests that human vision maintains stereopsis much further out than many researchers have thought: “Binocular depth discrimination and estimation beyond interaction space” https://jov.arvojournals.org/article.aspx?articleid=2122030

They measured out to 18m & point out that the typical measured limits of angular resolution of the human eye mean that we could extract stereo image information out to 200m or more.

This paper claims to demonstrate stereopsis out to 250m, which is roughly the limit you’d expect from typical human visual acuity: “Stereoscopic perception of real depths at large distances” https://jov.arvojournals.org/article.aspx?articleid=2191614

This paper suggests that steropsis occurs out to somewhere between 20m & 65m before other cues dominate 3D depth perception: “The Role of Binocular Cues in Human Pilot Landing Control” https://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.30...

It seems that the claim that stereo vision only occurs in the near field case is probably wrong? Human stereo vision is much more capable than that & if it reaches out to significantly > 20m is surely being used when driving?

[hedora]

I think binocular depth resolution is roughly proportional to the space between the cameras. A car hood is much wider than a human head. I’m not sure how far you can push that without hitting issues with close up stuff.

[pja]

Depends on the angular resolution of the sensor as well.

[hedora]

Yeah; proportional, assuming the sensor stays constant and hand waving about the FOV of the lens.