Originally published at: https://boingboing.net/2019/12/20/bewildering-optical-illusion-a.html
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For some reason, I can’t seem to make it rotate around the horizontal axis unless the cue for it is being shown.
Then there’s Akiyoshi Kitaoka’s illusion page, which features all sorts of static images that nonetheless seem to move. That one always weirds me out, though I occasionally run across an occasional one that doesn’t seem to work for me.
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I’d just put a piece of tape on one point. That would settle the problem pretty quickly.
What, that’s not the point?
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same. when the video began, i saw the shape rotating clockwise around a vertical axis, and could only visualize the alternate ideas as they were pointed out. by the end of the video, it kind of looked like it was oscillating back and forth.
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Yay, Lissajous figures. Used to make them on an oscilloscope.
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This video I made is based on that illusion (like watching clouds slowly change shape, if those clouds were Josef Albers paintings): https://vimeo.com/72490569
Me too. Struggled to see it after that (with no background) but could make it happen if I tried harder.
Yup.
The answer to “which axis” is “both.” The pattern results from running the horizontal deflection with one sine wave and the vertical with another of slightly different frequency. The first I remember was when a primary-school friend’s father showed them to us on his oscilloscope. This would have been early 1960s, but they’d been around since the 1930s at least.
Named for Jules Antoine Lissajous who published work on them in … 1857.
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Sheesh, what a crap video.
Aside from the annoying “music,” there’s very little chance to just watch the thing in motion, without a bunch of directions about how I’m supposed to be watching it. Ugh.
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Best illusion of 1919, amirite?
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I think its maker is actually trying to party like it’s 1999.
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Originally published at: https://boingboing.net/2019/12/20/see-the-winners-of-the-best-op.html
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Fun: I find Fukuda’s the most interesting, though. The others are just variations on classic themes, that seems to be a new kind of illusion.
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