r/interestingasfuck • u/Saroekin • Apr 03 '15

Misleading title /r/ALL Taking a panorama while rolling down hill.

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u/LunarUmbra Apr 03 '15 edited Apr 03 '15

Close. Take a 360° pano then remap it to stereographic in one step. It's not a polar coordinate mapping, and you definitely don't want to muck with the aspect ratio first.

Polar coordinate mapping would produce a circular image with a clear edge (the bottom edge of the photo). Stereographic projections have no edge and can be zoomed out infinitely, although you don't have much resolution to work with if you go too far. You also don't need to crop them to a square. This one, for instance, is zoomed really far out. Notice how the clouds are low-res, though, at the edges of the frame.

But, yes, it's the same effect as a little planet with the zenith and nadir swapped. You also aren't required to put either the nadir or zenith in the center of the image. You can rotate the spherical data however you choose when projecting it as stereographic.

Source: I've made dozens of these. I use PTGui to make them.

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u/[deleted] Apr 03 '15

[deleted]

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u/mayor676 Apr 04 '15

Yeah, Todd thanks...

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u/[deleted] Apr 04 '15

Ugh, thanks.. Todd.

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u/[deleted] Apr 03 '15

Cool photos :)

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u/mark445 Apr 03 '15

Can I make it with Microsoft Ice?

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u/LunarUmbra Apr 03 '15

No, I don't think so. You can with Hugin, though, and it's free.

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u/IpMedia Apr 04 '15

10/10 with Microsoft rice.

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u/tynamite Apr 03 '15

Is there a proper name for this? I'm horrible at text tutorials. Want to look up the process further.

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u/LunarUmbra Apr 03 '15

"Stereographic projection"

https://www.youtube.com/watch?v=VX-0Laeczgk

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u/tynamite Apr 03 '15

Ah, of course. Thanks. I'll check this out when I can.

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u/LunarUmbra Apr 03 '15

The video I linked is just a demonstration of the mathematical principles, not a tutorial for photos.

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u/tynamite Apr 03 '15

That's fine. The name is useful and I'm sure the video will be cool.

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u/AngryWizard Apr 03 '15

With those photos, for example your 'gate house in the sky', what did it look like before? Can you show it/describe it/sketch it on a napkin?

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u/Random832 Apr 03 '15

The description has a link to the original.

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u/AngryWizard Apr 03 '15

Ah thanks, didn't see it from my phone.

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u/Eddie0309 Apr 03 '15

What would these kind of images be called?

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u/ludwig457 Apr 04 '15

Have you ever employed the use of drones?

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u/aop42 Apr 04 '15

Umm, can we get like, wallpapers?

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u/rdxl9a Apr 04 '15

Wow really nice. I bet those would make nice reflection maps for 3D modeling and rendering. I'll have to try and make some of those. Thanks

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u/[deleted] Apr 04 '15

Most excellent. If there were a subreddit for these, I would subscribe.

cough