Optical Illusion: Maximize for Creepy Effect

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Discussion Overview

The discussion revolves around various optical illusions, with participants sharing links to videos and expressing their reactions to different types of illusions, including color perception and the phenomenon of gravity hills. The scope includes both conceptual appreciation of optical illusions and personal experiences with them.

Discussion Character

  • Exploratory
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • Some participants express excitement about optical illusions, noting their enjoyment and the creepy effects of certain videos.
  • There is a discussion about the color perception in an illusion where participants claim that squares A and B are the same color, with some suggesting that the color of the letters may be misleading.
  • A participant mentions using Photoshop to confirm the color values of the squares, indicating a method to verify the illusion.
  • Another participant describes the gravity hills phenomenon, suggesting that it creates the illusion of rolling uphill, which challenges intuitive understanding of physics.
  • One participant notes their experience of seeing a bluish tint in a black and white image, discussing the role of cone cells in color perception and the adjustment of their eyes.

Areas of Agreement / Disagreement

Participants generally share a fascination with optical illusions, but there is no consensus on the specifics of color perception in the discussed illusions. Multiple views on the nature of the illusions and their effects remain present.

Contextual Notes

Some discussions involve personal interpretations and experiences with optical illusions, which may depend on individual visual perception and conditions. The conversation includes references to specific visual phenomena that may not be universally experienced.

Who May Find This Useful

Individuals interested in visual perception, psychology of illusions, and those who enjoy exploring optical phenomena may find this discussion engaging.

dontdisturbmycircles
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Try it, its creepy. Its probably best to click "Maximize" at the top right of the video before playing.

http://emuse.ebaumsworld.com/watch/5850
 
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very cool!
 
Thanks. I love optical illusions! :!)
 
Oh man! I always fall for those screamer tricks!
 
haha yeah i thought it would be one of those "scary" turn-your-volume up ones but its not. Its actually really cool.
 
Screamers have ruined the world of optical illusions for everyone...
 
Hee...yeah, that's what I was expecting too. I even turned the volume down on my computer before I viewed it so I wouldn't scare the cat. :smile:
 
250px-Optical.greysquares.arp.jpg


This ones cool.

A and B are the same color!
 
the colour of the letters themselves, not the squares they're on?
 
  • #10
No, the squares. Not the letters.
 
  • #11
tricky...
 
  • #12
Yeah, that was posted somewhere else before, and the only way to convince myself they were the same color was to put the image into photoshop and use the eyedropper tool to pick up the color from each square and look at the color values. Though, I just noticed that if you really squint hard and look at it through partially closed eyes, you can tell it's the same color too (mostly by eliminating more of the context with the squinting).
 
  • #13
this ones much better

 
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  • #14
This too

http://video.google.com/videoplay?docid=-5947377811299306927&q=optical+illusion
 
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  • #15
and this

 
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  • #16
This is also another really cool optical illusion found all over the globe known as gravity hills. http://abclocal.go.com/wpvi/story?section=local&id=4958578 (play the video at the right)

apparently if youstart from rest with a car in neutral it will appear to roll up hill without hitting gas. it would seem like the hill is defying the laws of physics but it is just an optical illusion of the landscape.
 
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  • #17
http://video.google.com/url?docid=-3007153806728356812&esrc=gvpl&ev=v&q=optical+illusion&vidurl=http://video.google.com/videoplay%3Fdocid%3D-3007153806728356812%26q%3Doptical%2Billusion&usg=AL29H21I67GUjNu_F1tHru0Dmzzg3kJbfg"
 
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  • #18
dontdisturbmycircles said:
Try it, its creepy. Its probably best to click "Maximize" at the top right of the video before playing.

http://emuse.ebaumsworld.com/watch/5850
Well, I followed the instructions, but the B&W image still looked B&W, but with a bluish tint. But interestingly, I could see the bluish tint dissipate as the cones in my retina adjusted.

interesting stuff! :approve:
http://hyperphysics.phy-astr.gsu.edu/hbase/vision/rodcone.html

The "blue" cones are identified by the peak of their light response curve at about 445 nm. They are unique among the cones in that they constitute only about 2% of the total number and are found outside the fovea centralis where the green and red cones are concentrated. Although they are much more light sensitive than the green and red cones, it is not enough to overcome their disadvantage in numbers. However, the blue sensitivity of our final visual perception is comparable to that of red and green, suggesting that there is a somewhat selective "blue amplifier" somewhere in the visual processing in the brain.

I see well in low light (near darkness).
 
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  • #19
cyrusabdollahi said:
250px-Optical.greysquares.arp.jpg


This ones cool.

A and B are the same color!

Wow. That's amazing!
 
  • #20
 
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