There are sixteen circles in this image! Can you perceive them?
I have to admit it stumped me. Everything looked totally rectilinear. I couldn't see circles until I saw a reveal of the illusion. (In the link below.) Then the circles were obvious and now I can't not see them!
(It helps to let your eyes go out of focus a little...)
Here's the big reveal:
https://images.ctfassets.net/f60q1anpxzi...q=50&w=900
It seems that the brain's visual cortex has what might be called feature-detectors that pick features out of the visual data and try to piece together some recognition of what's being seen. In this illusion, apparently the line and corner detectors totally swamp and drown out the curve and circle detectors.
This illustrates part of my own theory about what the visual "patterns" that one sees on psychedelic drugs like LSD are. Feature-detectors are being triggered off randomly and the whole visual field becomes a seething mass of corners, curves and edges, without these features coming together into coherent objects.
I used to like how when I looked at a blank surface, it sometimes appeared like the surface was completely covered with unintelligible writing in some unknown alphabet of glowing letters of flame. Everything I looked at was covered with incomprehensible words whose meaning seemed vitally important somehow!
Forget the Bible, this was the real deal! I was experiencing it! I felt that if I could somehow read that transcendental/divine script, it would reveal the secrets of the universe to me!
(Sadly, it never happened.)
I have to admit it stumped me. Everything looked totally rectilinear. I couldn't see circles until I saw a reveal of the illusion. (In the link below.) Then the circles were obvious and now I can't not see them!
(It helps to let your eyes go out of focus a little...)
Here's the big reveal:
https://images.ctfassets.net/f60q1anpxzi...q=50&w=900
It seems that the brain's visual cortex has what might be called feature-detectors that pick features out of the visual data and try to piece together some recognition of what's being seen. In this illusion, apparently the line and corner detectors totally swamp and drown out the curve and circle detectors.
This illustrates part of my own theory about what the visual "patterns" that one sees on psychedelic drugs like LSD are. Feature-detectors are being triggered off randomly and the whole visual field becomes a seething mass of corners, curves and edges, without these features coming together into coherent objects.
I used to like how when I looked at a blank surface, it sometimes appeared like the surface was completely covered with unintelligible writing in some unknown alphabet of glowing letters of flame. Everything I looked at was covered with incomprehensible words whose meaning seemed vitally important somehow!
Forget the Bible, this was the real deal! I was experiencing it! I felt that if I could somehow read that transcendental/divine script, it would reveal the secrets of the universe to me!
(Sadly, it never happened.)