<div dir="ltr"><div>There's a link to the putative source at this web site</div><div><a href="https://soranews24.com/2020/02/25/brain-breaking-optical-illusion-from-japan-is-a-lie-within-a-lie-truly-amazing" target="_blank">https://soranews24.com/2020/02/25/brain-breaking-optical-illusion-from-japan-is-a-lie-within-a-lie-truly-amazing</a></div><div><br></div><div>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. <br></div><div><br></div><div>Best,</div><div>Ben<br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Feb 28, 2020 at 7:48 PM Saul, Alan <<a href="mailto:ASAUL@augusta.edu" target="_blank">ASAUL@augusta.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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I'd appreciate pointers to who originally made this nice GIF:</div>
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<a href="https://gfycat.com/earnestplaincamel" target="_blank">https://gfycat.com/earnestplaincamel</a><br>
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Thanks.</div>
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Alan Saul</div>
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Dept. of Ophthalmology</div>
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Augusta University</div>
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<a href="mailto:asaul@augusta.edu" target="_blank">asaul@augusta.edu</a></div>
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706-721-0695</div>
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CB 2608</div>
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</blockquote></div><br clear="all"><br>-- <br><div dir="ltr"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr">Ben Backus</div><div>CSO, Vivid Vision Inc (<a href="mailto:ben@seevividly.com" target="_blank">ben@seevividly.com</a>)<br></div><div>Assoc. Prof. Emeritus, SUNY College of Optometry (<a href="mailto:bbackus@sunyopt.edu" target="_blank">bbackus@sunyopt.edu</a>)<br></div><div dir="ltr"><a href="http://poseidon.sunyopt.edu/Backuslab/" target="_blank"></a></div></div></div></div></div></div></div></div>