The Spherical Droste Effect, with added twist and recursion
June 28, 2016 7:44 PM   Subscribe

Mind-bending video from Matt Parker (standupmaths) and Henry Segerman.

Make sure you switch your pov in the video once they go down one level ...
Previous introductory video on spherical video.
posted by carter (21 comments total) 28 users marked this as a favorite
 
Just please note that this comment references the fifth comment below.
posted by sammyo at 7:57 PM on June 28, 2016


Really quite an incredible display of technical finesse

Really quite an incredible 6th comment.
posted by an animate objects at 8:05 PM on June 28, 2016 [2 favorites]




Fourth comment sucks, though.
posted by teponaztli at 8:14 PM on June 28, 2016 [2 favorites]


This is the fifth comment.
posted by DoctorFedora at 8:17 PM on June 28, 2016


High five!
posted by Artw at 8:19 PM on June 28, 2016 [1 favorite]


For some of the math behind it, you should read his accompanying paper. The basic idea is fairly straightforward.

You take your spherical video, project it to the plane via stereographic projection, and then apply the Droste transformation. Then unproject it, and you have weird portally spherical video.
posted by BungaDunga at 8:39 PM on June 28, 2016


First!
posted by ashbury at 8:53 PM on June 28, 2016 [11 favorites]


Reminds me of this clever video by the Mountain Goats.
posted by ashbury at 8:54 PM on June 28, 2016 [2 favorites]


Ow, fifth comment quit poking me.
posted by not_the_water at 8:58 PM on June 28, 2016 [1 favorite]






There was an ironing board on the wall behind the couch at the beginning... where did it go? My shirts are going to end up SO wrinkled!!!
posted by oneswellfoop at 9:45 PM on June 28, 2016


That was really cool, but it was also the type of thing I have nightmares (the actual while you're asleep kind) about. I have a history of having bad dreams about bizzare and even hostile geometry: Stranded in the "middle" of an infinite plane, entering a Mandelbrodt fractal but losing track of whether I need to zoom in or out to get back to my original point of ingress, being a 3D being standing "outside" of a 1D universe, but it is tangled around me and will slice me to ribbons if I contact it, floating in The Universe after its heat death and what remains of physical space is slowly shrinking in on me and what is outside the remaining physical space isn't actual space at all.....so yeah, that was cool but also a little unnerving.

I also have a mild but real fear of cranes (the construction kind, not the bird), so go figure.
posted by sourwookie at 10:00 PM on June 28, 2016 [6 favorites]


The Last Visible Dog
posted by Faint of Butt at 3:53 AM on June 29, 2016 [2 favorites]


sourwookie, I thought I was the only one who had those nightmares! It's why I can't play Minecraft or look at any of those AI videos where they turn a squirrel into a bunch of connected eyeballs. Thanks for the heads-up, I will NOT be clicking on this link.
posted by Mogur at 4:31 AM on June 29, 2016


Really quite an incredible display of technical finesse.
posted by idb at 4:54 AM on June 29, 2016 [2 favorites]


Vi hart did one of these with him, IIRC.

found it!
https://www.youtube.com/watch?v=oVwmF_vrZh0
posted by _Synesthesia_ at 5:31 AM on June 29, 2016 [1 favorite]


When he poked his hand through to the other image, it broke my brain. I half expected Daffy Duck to show up with an oversize pencil eraser.
posted by pjern at 6:05 AM on June 29, 2016 [2 favorites]


And people think all the cool stuff's been invented already.... ha!
posted by MikeWarot at 10:19 AM on June 29, 2016


It is kind of neat watching the older video in a browser that doesn't support spherical projection to see the transformations that are being applied outside of the projection's particular parlor trick.
posted by Kyol at 11:00 AM on June 29, 2016 [1 favorite]


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