• WANTED: Happy members who like to discuss audio and other topics related to our interest. Desire to learn and share knowledge of science required as is 20 years of participation in forums (not all true). There are daily reviews of audio hardware and expert members to help answer your questions. Click here to have your audio equipment measured for free!

Neat optical illusion

Blumlein 88

Grand Contributor
Forum Donor
Joined
Feb 23, 2016
Messages
17,151
Likes
29,873
frontiers-human-neuroscience-expanding-hole-illusion.jpg



Explanation of this relatively new optical illusion.
 

RayDunzl

Grand Contributor
Central Scrutinizer
Joined
Mar 9, 2016
Messages
12,308
Likes
14,605
Location
Riverview FL
 

Axo1989

Major Contributor
Joined
Jan 9, 2022
Messages
1,053
Likes
905
frontiers-human-neuroscience-expanding-hole-illusion.jpg



Explanation of this relatively new optical illusion.
I see just a hint, then it stops. Must be a 14%er ... or is it extra subtle?
 

Axo1989

Major Contributor
Joined
Jan 9, 2022
Messages
1,053
Likes
905
I like this one:
View attachment 210516

Put your mouse cursor on an edge just to see they don't move, get bigger or even shift.
This one isn’t subtle for me, but the mechanism (out of phase inner and outer borders) is straightforward. It’s a decent analogy for phase effects used to enhance stereo image (ironically, people like to use it to ague the opposite, not knowing how it works).
 
OP
Blumlein 88

Blumlein 88

Grand Contributor
Forum Donor
Joined
Feb 23, 2016
Messages
17,151
Likes
29,873
trippyredballs.gif


I've always liked this one. Focus on the plus sign in the middle. See that rotating green dot. Well there is no green dot. They just blank out the pink one leaving the gray background. For a moment you eye sees green.
 

Axo1989

Major Contributor
Joined
Jan 9, 2022
Messages
1,053
Likes
905
trippyredballs.gif


I've always liked this one. Focus on the plus sign in the middle. See that rotating green dot. Well there is no green dot. They just blank out the pink one leaving the gray background. For a moment you eye sees green.
Negative colour afterimage (explained by opponent process theory) is also straightforward. The first one is your best so far (even if it doesn't work for everyone).
 

Soniclife

Major Contributor
Forum Donor
Joined
Apr 13, 2017
Messages
4,213
Likes
4,951
Location
UK
frontiers-human-neuroscience-expanding-hole-illusion.jpg



Explanation of this relatively new optical illusion.
Does not work on me, I wonder why.
There is a whole site of these.
 

MarcosCh

Major Contributor
Joined
Apr 10, 2021
Messages
1,702
Likes
1,346
frontiers-human-neuroscience-expanding-hole-illusion.jpg



Explanation of this relatively new optical illusion.
This is what i see when i go to work
 

restorer-john

Grand Contributor
Forum Donor
Joined
Mar 1, 2018
Messages
10,398
Likes
30,012
Location
Gold Coast, Queensland, Australia
I've always liked this one. Focus on the plus sign in the middle. See that rotating green dot. Well there is no green dot. They just blank out the pink one leaving the gray background. For a moment you eye sees green.

Oh wow, that is really messed up. ;)

I can never trust my eyes again.
 

BDWoody

Chief Cat Herder
Moderator
Forum Donor
Joined
Jan 9, 2019
Messages
5,951
Likes
18,070
Location
Mid-Atlantic, USA. (Maryland)
Top Bottom