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Comment by dahart | Hacker News Reader

> Ans: 576 Megapixels

I’m skeptical. Since the human eye has less than 150M sensor cells, and our sensors aren’t as good as 8 or 10 bit resolution pixels, that answer is overestimating by at least 4x, and possibly a lot more. https://en.m.wikipedia.org/wiki/Photoreceptor_cell

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He misconveyed the source. The claim was about the detail the eye can percieve in a given field of view, over time and by moving the eyes over it, not the amount of information the eye captures at any one time, which is vastly lower.

It's mostly irrelevant for cars TBH, since crashes are quick events.

That’s a simplification. The events leading up to a crash are important. The spatial understanding of the situation on the road, the behavior of other drivers and other factors all play a role in the seconds before a crash.

Yes, but there's a time-accuracy trade off when you see things by scanning around. A good, wide camera trades off remembered perepheral details for lower-resolution but temporally up-to-date details, which matters more in a crash I'd expect.

I can tell the difference between two 24-bit colors that are 1 value off in 1 channel, and that's not counting that digital displays can't fully exploit the darkest or brightest ranges of our eyes' sensitivity. Have you ever seen an HDR display showing well-made HDR content? Spatial resolution is not so easy, since we have much higher resolution at the center of our FOV.

Sure, that is true, you can sometimes see the difference in two 8-bits-per-channel colors. But, it takes both time and more than one pair of photoreceptive cell in your eyes to see that difference. There’s a tradeoff between color resolution and spatial resolution. Your spatial resolution at the sensitivity of seeing the difference in 8-bit colors is way lower that 150 megapixels.

BTW, 24 bit colors that are carefully done, paying proper attention to color space and gamma, have been specifically designed to be at the JND (just-noticeable difference) with a 1-bit change in value. If you can always and reliably see the difference between any pair of 24 bit colors that are only 1 bit different, then you have abnormally good color vision. It’s statistically unlikely for that to be true, but some people do have it.

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