• August 14, 2022, 09:44:13 PM

Author Topic:  Optical Illusion  (Read 307 times)

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Online dankje

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Optical Illusion
« on: June 24, 2022, 03:50:06 AM »
I hope I'm not too far off topic, but I thought I'd share this interesting image.  I actually have to avoid looking it due to a damaged vestibular system.  Does anyone know what makes this illusion work?

Linkback: https://fractalforums.org/index.php?topic=4800.0

Offline 3DickUlus

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Re: Optical Illusion
« Reply #1 on: June 25, 2022, 12:57:33 AM »
Wow, that is weird... I think it's because the brain dedicates more "attention" to the central part of our view and the peripheral areas are estimated with less "attention" until there is some noticed change that prompts us to look in that direction,. The patterns in the image are enough to set off the estimation process and because the colours are similar in brightness saturation and contrast, combined with lower visual fidelity in the peripheral areas, the estimation engine is free to throw in a bit of imagination. Evolved over millions of years I think this is an adaptation that has allowed better survival rates. Of course that's based on what I perceive, your mileage may vary.

When we are fatigued our eye muscles exhibit micro tremors which makes some static patterns seem very mobile, there has been research into this, it also happens with simple 3 or 4 colour images as well as black and white. This is a link to a study by some folks that have a lot more information than I do...

https://www.researchgate.net/publication/220184679_Self-animating_images_Illusory_motion_using_repeated_asymmetric_patterns

Online dankje

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Re: Optical Illusion
« Reply #2 on: June 25, 2022, 03:42:08 AM »
imho... Places that seem to curve are suggested by placement, size, color, etc of the small tiles between the grid lines into curved linear patterns.  Lighter colored, arched "scratches" that have just enough form to catch the attention of the estimation engine. Lime green is the dominant color and when the brain thinks it has found a new connection it raises its importance by assigning that color.  To me that's the amazing part.

The link is very interesting.

Offline ottomagus

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Re: Optical Illusion
« Reply #3 on: June 25, 2022, 01:07:25 PM »
suggested by placement, size, color, etc of the small tiles between the grid lines into curved linear patterns.

Those grey and white tiled areas appear to be the same formation in various rotations. As they are rotated, perhaps the mind tries to rotate the green lines too?

Offline 3DickUlus

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Re: Optical Illusion
« Reply #4 on: July 02, 2022, 01:50:04 AM »
12 dots, do you see them all at the same time ?

this makes me wonder if our brains are wired for irregular or fractal patterns to such a degree that we make them up when we see regular symmetric patterns ???

Online dankje

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Re: Optical Illusion
« Reply #5 on: July 02, 2022, 02:58:27 AM »
Cool!  If I look between dots and I can see two.  If I look at just one dot for a while all the others go away.  I don't think this has anything to do with blind spots.  It's as if my brain is throwing away information, assuming from the over-riding order of the lines that they are all that's there.

It's a good example of how hard it can be to find the truth.

Offline Caleidoscope

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Re: Optical Illusion
« Reply #6 on: July 06, 2022, 09:18:52 AM »
Wow, really bizar!

I got some issues with my eyes and one thing I have to do is to check 'regulair'  :skeptical: with the Amslertest. Checking if you see the line straight or not.

So the first thing when I looked at this illusion was, Sh.t my eyes really got worse   :fp: Well luckily it was just an optical illusion.
I really do love it, it doesn't bend just a bit, but huge!   :worship:

Online dankje

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Re: Optical Illusion
« Reply #7 on: July 07, 2022, 05:12:01 AM »
Yes, the first image feels like it could set off my nystagmus, so I have to look away.  see Meniere's disease

I should have started this thread in Off Topic forum.  Learning...

Offline Caleidoscope

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Re: Optical Illusion
« Reply #8 on: July 07, 2022, 08:17:25 AM »
Yes, the first image feels like it could set off my nystagmus, so I have to look away.  see Meniere's disease

I should have started this thread in Off Topic forum.  Learning...

No problem, after all it looks a bit like a gnarl  :))

Meniere's disease, ohhh that's sounds bad and difficult to cope with.
Under good social custom, You show me yours and I''ll show you mine  :lol:
So, I have Sjögren a rheumatic disorder in my eyes and a melanome (still benign)