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BaldFriede 
Prog Reviewer 
Joined: June 02 2005 Location: Germany Status: Offline Points: 10266 |
 Topic: The most amazing optical illusion I ever saw!Posted: June 26 2009 at 10:28 |
 This one really is incredible! You see spirals in three different colours, red, blue and green, right? The green and blue spirals, however, are exactly of the same colour! |
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 BaldJean and I; I am the one in blue. |
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Mr ProgFreak
Forum Senior Member 
Joined: November 08 2008 Location: Sweden Status: Offline Points: 5195 |
Posted: June 26 2009 at 10:37 |
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Very nice!
 This one is quite nice, too:  (It's actually the album cover of an album released this year, click the image for the vinyl edition) |
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Jim Garten
Special Collaborator 
Retired Admin & Razor Guru Joined: February 02 2004 Location: South England Status: Offline Points: 14693 |
Posted: June 26 2009 at 10:44 |
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Ooohh - nice ones
This is a bit of a doozie too: 
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Jon Lord 1941 - 2012 |
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Mr ProgFreak
Forum Senior Member
Joined: November 08 2008 Location: Sweden Status: Offline Points: 5195 |
Posted: June 26 2009 at 10:48 |
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TheCaptain
Forum Senior Member
Joined: January 04 2009 Location: Ohio, USA Status: Offline Points: 1335 |
Posted: June 26 2009 at 11:10 |
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Explanation on the first one: http://blogs.discovermagazine.com/badastronomy/2009/06/24/the-blue-and-the-green/
Edited by TheCaptain - June 26 2009 at 11:11 |
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Curse your sudden but inevitable betrayal.
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harmonium.ro
Special Collaborator
Honorary Collaborator / Retired Admin Joined: August 18 2008 Location: Anna Calvi Status: Offline Points: 22989 |
Posted: June 26 2009 at 15:01 |
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I can cleary see the blue and green are blue and green. However, it may indeed be an optical manipulation: maybe, an effect of the complementarity contrast?
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BaldFriede
Prog Reviewer
Joined: June 02 2005 Location: Germany Status: Offline Points: 10266 |
Posted: June 26 2009 at 15:40 |
Trust me; the colours are identical. I loaded the image into UPaint; both the "blue" and the "green" were of the same combination of red, green and blue (actually no red at all, 255 green and 150 blue). |
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BaldJean and I; I am the one in blue. |
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Ricochet
Special Collaborator
Honorary Collaborator Joined: February 27 2005 Location: Nauru Status: Offline Points: 46301 |
Posted: June 26 2009 at 15:42 |
Seeing the blue and green as blue and green IS the illusion. They're actually the same color. Explanations were offered above. Edited by Ricochet - June 26 2009 at 15:43 |
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harmonium.ro
Special Collaborator
Honorary Collaborator / Retired Admin Joined: August 18 2008 Location: Anna Calvi Status: Offline Points: 22989 |
Posted: June 26 2009 at 17:20 |
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We're getting into semiotics now but I have to explain my position: what I see is green and blue and that is what they are to me. The fact that it's an optic manipulation of the same colour by combination with other colours and by using the recognition patterns of our brain, that is another thing. It is epistemologically correct to base your judgement over the information provided by your subjective experience, disregarding the "objective" truth (in this case the fact that the colour is actually different than what it looks like). Epistemology learns one a lot about relativity of things, perception and ration.
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Queen By-Tor
Special Collaborator
Honorary Collaborator Joined: September 13 2006 Location: Xanadu Status: Offline Points: 16111 |
Posted: June 26 2009 at 17:24 |
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yeah, but the green and blue are actually just a shade of turquoise IN FACT, so your semantics still don't apply
 very cool effect though! |
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Vompatti
Forum Senior Member
VIP Member Joined: October 22 2005 Location: elsewhere Status: Offline Points: 67407 |
Posted: June 26 2009 at 17:31 |
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I wonder what Wittgenstein would have thought about this . . .
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JJLehto
Prog Reviewer
Joined: April 05 2006 Location: Tallahassee, FL Status: Offline Points: 34550 |
Posted: June 26 2009 at 17:48 |
Oh god, I hate that one. It's so freaky maaaaaaaaaan And gives me a headache  |
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harmonium.ro
Special Collaborator
Honorary Collaborator / Retired Admin Joined: August 18 2008 Location: Anna Calvi Status: Offline Points: 22989 |
Posted: June 26 2009 at 18:02 |
Of course they don't apply to you because you have a different epistemological view than mine, that was the point |
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Queen By-Tor
Special Collaborator
Honorary Collaborator Joined: September 13 2006 Location: Xanadu Status: Offline Points: 16111 |
Posted: June 26 2009 at 18:03 |
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yes, but an illusion is subjective, the image itself remains objective. There's no denying that the color is constant throughout the image
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Henry Plainview
Forum Senior Member
Joined: May 26 2008 Location: Declined Status: Offline Points: 16715 |
Posted: June 26 2009 at 18:08 |
Oh lord, are you one of those people who doesn't believe in reality?
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if you own a sodastream i hate you
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JJLehto
Prog Reviewer
Joined: April 05 2006 Location: Tallahassee, FL Status: Offline Points: 34550 |
Posted: June 26 2009 at 18:10 |
 A and B are the same color. |
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Snow Dog
Special Collaborator
Honorary Collaborator Joined: March 23 2005 Location: Caerdydd Status: Offline Points: 32995 |
Posted: June 26 2009 at 18:19 |
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^^Now that I believe!
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harmonium.ro
Special Collaborator
Honorary Collaborator / Retired Admin Joined: August 18 2008 Location: Anna Calvi Status: Offline Points: 22989 |
Posted: June 26 2009 at 19:25 |
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@Mike: all knowledge is subjective (which doesn't make it more reliable than it is). Even the fact of you stating that the colour is the same is an aplication of your subjective preference for the notions of "objective realities". Of course that doesn't mean I don't agree with you about the colour. What's important to me though is that the colour looks in two different ways, and I'm basing my rational judgements on this perception, which I found more down to earth and "realistic" than keeping in mind that the colour is actually not what it looks like.
@Henry: having a good sense of relativity (in an epistemological way, not ethical) actually gives one a better grip to the actual world. |
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harmonium.ro
Special Collaborator
Honorary Collaborator / Retired Admin Joined: August 18 2008 Location: Anna Calvi Status: Offline Points: 22989 |
Posted: June 26 2009 at 19:30 |
Actually this is a paradox. It is correct to say that A and B are the same thing: opposite non-chromatic expressions of light. (Meaning: they're not colours, so yeah they're the same colour ) |
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JJLehto
Prog Reviewer
Joined: April 05 2006 Location: Tallahassee, FL Status: Offline Points: 34550 |
Posted: June 26 2009 at 19:36 |
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Well that's true there not colors...technically shades of grey I believe
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The most amazing optical illusion I ever saw!
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harmonium.ro wrote: