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NCC1968
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I have a few saved on my server....let me look.....
Amazing optical illusion.. look in
- Thread starter Deimos Anomaly
- Start date
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NCC1968
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Goes to show that Human perception is deeply flawed.
Thanks for the headache, guys. 
Huh?
Anyway, I got her to change direction (she's predominantly clockwise for me) by blocking my view of the woman and just focusing on the shadow for a few seconds.
It's definitely a real effect. Deconstructing the image shows only a single, unidirectional group of frames. The change of direction is perceived, not produced.
Same here. Very strange.
Yeah, I saw that one years ago and tested it with, I dunno, ClarisWorks or something old and Macintoshy.Photoshop agrees that the two squares are the same colour. I've just colour picked square B. Imagine my amazement when it came out grey! Just forwarded this to my husband so he can amaze all the folks in work!
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NCC1968
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After a few seconds of concentration I could get her to change direction w/o looking away....cool.
So um... on the first post...
were they supposed to appear like they are different colors?
And on the rest. All you have to do is not focus on any one point and they won't move.
were they supposed to appear like they are different colors?
And on the rest. All you have to do is not focus on any one point and they won't move.
Seriously? It's a checkerboard pattern, and A and B are supposed to appear to be two different colors on the checkerboard.
We did a lot of these when I was in eyeball school. Here's my favorite...but you need to read these instructions before you click on the link....
There's two groups of people (one group wearing white shirts, the other wearing black). Each group has a basketball that they are passing back and forth to people on their own team. Your job is to ignore the guys in the black shirts and count how many times the white shirts pass the basketball to each other. That's it.
http://viscog.beckman.uiuc.edu/grafs/demos/15.html
The answer...
There's two groups of people (one group wearing white shirts, the other wearing black). Each group has a basketball that they are passing back and forth to people on their own team. Your job is to ignore the guys in the black shirts and count how many times the white shirts pass the basketball to each other. That's it.
http://viscog.beckman.uiuc.edu/grafs/demos/15.html
The answer...
There's actually a guy in a gorilla suit that's walks into view about halfway through the video. People are split about 50/50 whether they see him or not. The people that don't see the gorilla miss it because their brain has decided to ignore the stimuli that are black(the black shirts), and they've succeeded. The people that DO see him are less able to keep themselves attending to an assigned task. We did this in a group of about 150 people and it was amazing; half the class was stunned to hear that their was a gorilla, and the other half couldn't believe that people missed it!
When I looked at it I was confused. I didn't know they were supposed to appear to be different colors, they both looked the same to me.
Read the post a couple times just to make sure. Never looked different to me.
Flawed how?
Human perception is actually marvellously good at what it does - letting us absorb a vast amount of data very quickly and then interpret it just as quickly into a useful product for our conscious and unconscious minds to access.
That rapid processing is built on a number of rules, schema and short-cuts hard-wired into our brains and fine-tuned by experience. As a minor by-product, we get the fun of optical illusions, but without them we'd probably be unable to even walk due to sheer amount of data and the amount of processing required to analyse it with brute force.
For instance, the chess board illusion demonstrates the principle of colour constancy. Without this short-cut, we wouldn't be able to understand colour the way we do. Everything would be continually changing colour depending on the exact light intensity of the room/world.
Far out man!!!
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