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xkcd: Depth Perception - 巨人の奥行き感覚を得る実験


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Depth Perception(奥行き感覚)

[I've always had trouble with the size of clouds.]

[I know they're huge. I can see their shapes.]

[But I don't really see them as objects on the same scale as tree and buildings.]

[They're a backdrop.]

[Stars are the same way.]

I know they're scattereded through an endless ocean, but my gut insists they're a painting on a domed ceiling.

[If I try hard enough, I get a glimmer of depth, a dizzying sense of space, but then everything snaps back.]

[So one summer afternoon]

[I set up two hd webcams hundreds of feet apart, pointed them at the sky, and fed one stream to each of my eyes.]

[The parallax expanded my depth perception by a thousand times, and I stood in my living room at the bottom on an abyss]

[Watching mountains drift by.]

Alt-text: I've looked at clouds from both sides now.







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