[visionlist] Local global motion GIF

[Ben Backus]

There's a link to the putative source at this web site
https://soranews24.com/2020/02/25/brain-breaking-optical-illusion-from-japan-is-a-lie-within-a-lie-truly-amazing

Here's a Matlab live script with an explanation, attached. It can be
re-saved as an m-file, or just use it as pseudocode. It shows how the
stimulus changes over time. The actual cause of the motion is described in
the three references at the top of the script. I don't think one needs to
appeal to reverse phi here, just spatial-frequency-selective motion
detectors. Since the stimulus is not periodic at the same fine scale as the
lines within it, it can engage low-spatial-frequency mechanisms.

Best,
Ben

On Fri, Feb 28, 2020 at 7:48 PM Saul, Alan <ASAUL at augusta.edu> wrote:

> I'd appreciate pointers to who originally made this nice GIF:
>
> https://gfycat.com/earnestplaincamel
>
> Thanks.
>
>
> Alan Saul
> Dept. of Ophthalmology
> Augusta University
>
> asaul at augusta.edu
> 706-721-0695
> CB 2608
>
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> visionlist at visionscience.com
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>


-- 
Ben Backus
CSO, Vivid Vision Inc (ben at seevividly.com)
Assoc. Prof. Emeritus, SUNY College of Optometry (bbackus at sunyopt.edu)
<http://poseidon.sunyopt.edu/Backuslab/>
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