Akiyoshi's Illusion Pages | Hacker News Reader

Akiyoshi's Illusion Pages

ritsumei.ac.jp

180 pointsmxfh17 comments

This is super interesting:

http://en.ritsumei.ac.jp/news/detail/?id=278

https://www.frontiersin.org/articles/10.3389/fpsyg.2018.0034...

Apparently he showed his "rotating snake" image to a neural network trained to predict upcoming video frames, it also "saw" the illusory motions.

I can’t believe he’s still updating this, thanks so much for the link. Been years since I saw this. The guy is straight-up hacking your visual processing system!

I find it funny and cute seeing animals react to these:

https://www.youtube.com/watch?v=CcXXQ6GCUb8&ab_channel=rasmu...

https://www.youtube.com/watch?v=S4IHB3qK1KU&ab_channel=Squir...

I would also recommend following Akiyoshi on Twitter (https://twitter.com/AkiyoshiKitaoka) so you can have a daily dose of visual hackery on your Twitter feed :)

It's got amazing stuff!

https://twitter.com/AkiyoshiKitaoka/status/13500017144436080...

http://www.psy.ritsumei.ac.jp/~akitaoka/saishin63e.html

"Illusory yellow is observed around hearts."

Had to zoom to be convinced that there really are indeed no #ffff00 pixels in there

This would be an interesting way to create the illusion of fifth color in 4-color CGA

Seen many of those countless times on the internet without credits. Great to see the original source, thanks for sharing!

Love the classic professorial web design.

I remember stumbling on this page in 2003-2004. When I saw the title here I thought 'I hope it's the same' - and it is! It looks exactly like it was back then[1]. Love it!

[1] https://web.archive.org/web/20030202031646/http://www.ritsum...

What's curious for me is that I've visited these illusions before in the past and over time I've noticed that I've gradually stopped experiencing a growing number of them.

When seeing lists of optical illusions, I never see anything regarding Edward Land's work regarding the perception of color in red/white images[0]. With readily available HDR displays this may no longer be relevant, but still interesting.

0 - https://web.archive.org/web/20080914012938/http://land.t-a-y...

Another site in a similar vein, which is worth a mention.

https://michaelbach.de/ot/

I like the hit counter with 129 million at the bottom

I am sure I am not the only one but some of the illusions do not work for me, and some only work after reading the description. Does your brain needs to be trained to 'get' the illusion?

I've noticed that as well - but others just about leap off the page for me. Also, some only seem to work at certain distances, or if I am moving, or if I'm scrolling the page.

Vision is deeply entangled with pattern recognition, so it makes sense: feeding data into your brain about what it's expected to detect will help with detecting it. It's counterintuitive, but in the end vision is not really the low-level signal we think it is, but rather a pretty high-level conceptualization.

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