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3-D Optical Illusions

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Dave B
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Re: 3-D Optical Illusions

#81 Postby Dave B » February 12th, 2015, 2:50 pm

Latest post of the previous page:

Very clever!
"Look forward; yesterday was a lesson, if you did not learn from it you wasted it."
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Alan H
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Re: 3-D Optical Illusions

#82 Postby Alan H » February 27th, 2015, 10:33 am

No clues, just answer the question. No spoiling it for others, no looking it up on the Internet.

What colour (or colours) is this dress?

dress.jpg
dress.jpg (101.76 KiB) Viewed 1300 times
Alan Henness

There are three fundamental questions for anyone advocating Brexit:

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Dave B
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Re: 3-D Optical Illusions

#83 Postby Dave B » February 27th, 2015, 3:21 pm

Are we supposed to answer with what we (think) we see the colour as?
"Look forward; yesterday was a lesson, if you did not learn from it you wasted it."
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Alan H
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Re: 3-D Optical Illusions

#84 Postby Alan H » February 27th, 2015, 4:22 pm

Yep!
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There are three fundamental questions for anyone advocating Brexit:

1. What, precisely, are the significant and tangible benefits of leaving the EU?
2. What damage to the UK and its citizens is an acceptable price to pay for those benefits?
3. Which ruling of the ECJ is most persuasive of the need to leave its jurisdiction?

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Dave B
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Re: 3-D Optical Illusions

#85 Postby Dave B » February 27th, 2015, 5:16 pm

OK, I' buy it, black and blue
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Fia
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Re: 3-D Optical Illusions

#86 Postby Fia » February 27th, 2015, 10:20 pm

kingfisher and taupe?

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Altfish
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Re: 3-D Optical Illusions

#87 Postby Altfish » February 27th, 2015, 10:30 pm

Light blue and black?

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Alan H
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Re: 3-D Optical Illusions

#88 Postby Alan H » February 27th, 2015, 10:36 pm

Oh god. It's an interesting phenomenon but it's going to be on Newsnight shortly...
Alan Henness

There are three fundamental questions for anyone advocating Brexit:

1. What, precisely, are the significant and tangible benefits of leaving the EU?
2. What damage to the UK and its citizens is an acceptable price to pay for those benefits?
3. Which ruling of the ECJ is most persuasive of the need to leave its jurisdiction?

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Altfish
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Re: 3-D Optical Illusions

#89 Postby Altfish » February 27th, 2015, 10:44 pm

It was mentioned on the radio this afternoon.

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Fia
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Re: 3-D Optical Illusions

#90 Postby Fia » February 27th, 2015, 11:08 pm

facebook is full of it: much scrolling through :cross: I reckon the difficulty is the variety of media we look at this picture from, and the light when we look at it. A large PC screen will be different from a mobile. The original was only a snap, sharing is often low resolution.

And is it just me that thinks it's a rather horrible dress, whatever colours it may be? :exit:

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Dave B
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Re: 3-D Optical Illusions

#91 Postby Dave B » February 28th, 2015, 9:00 am

Now the secret is out it is interesting why people do see very different colours, not just different shades that any collection of screens might produce.

I missed one supposed explanation last night.
"Look forward; yesterday was a lesson, if you did not learn from it you wasted it."
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Tetenterre
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Re: 3-D Optical Illusions

#92 Postby Tetenterre » February 28th, 2015, 4:53 pm

Light blue-violet and golden-brown.
Steve

Quantum Theory: The branch of science with which people who know absolutely sod all about quantum theory can explain anything.

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Alan H
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Re: 3-D Optical Illusions

#93 Postby Alan H » March 1st, 2015, 1:47 pm

Alan Henness

There are three fundamental questions for anyone advocating Brexit:

1. What, precisely, are the significant and tangible benefits of leaving the EU?
2. What damage to the UK and its citizens is an acceptable price to pay for those benefits?
3. Which ruling of the ECJ is most persuasive of the need to leave its jurisdiction?

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Dave B
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Re: 3-D Optical Illusions

#94 Postby Dave B » March 1st, 2015, 5:10 pm

Remember this illusion? Wonder if it is a related effect.
download/file.php?id=1685
"Look forward; yesterday was a lesson, if you did not learn from it you wasted it."
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jaywhat
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Re: 3-D Optical Illusions

#95 Postby jaywhat » March 2nd, 2015, 10:21 am

We all see colours differently as do other animals. Some soldiers with red/green colour 'blindness' were useful in certain war zones where they could detect camouflaged enemy especially in jungle.

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Alan H
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Re: 3-D Optical Illusions

#96 Postby Alan H » May 4th, 2015, 11:39 am

An appropriate cartoon for today, Star Wars Day:

Screenshot from 2015-05-04.png
Screenshot from 2015-05-04.png (285.33 KiB) Viewed 1147 times
Alan Henness

There are three fundamental questions for anyone advocating Brexit:

1. What, precisely, are the significant and tangible benefits of leaving the EU?
2. What damage to the UK and its citizens is an acceptable price to pay for those benefits?
3. Which ruling of the ECJ is most persuasive of the need to leave its jurisdiction?

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jaywhat
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Re: 3-D Optical Illusions

#97 Postby jaywhat » May 6th, 2015, 7:11 am

Alan H wrote:No clues, just answer the question. No spoiling it for others, no looking it up on the Internet.

What colour (or colours) is this dress?

dress.jpg



Red and blue

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Tetenterre
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Re: 3-D Optical Illusions

#98 Postby Tetenterre » May 6th, 2015, 10:15 am

Steve

Quantum Theory: The branch of science with which people who know absolutely sod all about quantum theory can explain anything.

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Alan H
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Re: 3-D Optical Illusions

#99 Postby Alan H » May 16th, 2018, 12:22 pm

Actually, this is a sound illusion: Yanny or Laurel? Sound 'illusion' sets off ear-splitting arguments

Fascinating.

Assuming these are correct and unaltered apart from the pitch, this is just bewildering:

Ok, so if you pitch-shift it you can hear different things:

down 30%: https://xxv.so/0x6841c258
down 20%: https://xxv.so/0x75b636d0
up 20%: https://xxv.so/0x9d0eb907
up 30% https://xxv.so/0x6d752ac8
up 40% https://xxv.so/0x90b8eeee


Listening to some of these then going back to the original sometimes changes what I hear. Anyone else?
Alan Henness

There are three fundamental questions for anyone advocating Brexit:

1. What, precisely, are the significant and tangible benefits of leaving the EU?
2. What damage to the UK and its citizens is an acceptable price to pay for those benefits?
3. Which ruling of the ECJ is most persuasive of the need to leave its jurisdiction?

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Alan H
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Joined: July 3rd, 2007, 10:26 pm

Re: 3-D Optical Illusions

#100 Postby Alan H » May 17th, 2018, 1:01 am

Alan Henness

There are three fundamental questions for anyone advocating Brexit:

1. What, precisely, are the significant and tangible benefits of leaving the EU?
2. What damage to the UK and its citizens is an acceptable price to pay for those benefits?
3. Which ruling of the ECJ is most persuasive of the need to leave its jurisdiction?

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animist
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Re: 3-D Optical Illusions

#101 Postby animist » May 17th, 2018, 9:50 pm

Alan H wrote:
this was on Facebook, and is an auditory rather than optical illusion. Is it an illusion at all? It seems to be just a case of a computer trying rather badly to mimic some regional accent and coming up with sounds which are not represented in our speech. BTW, the sound sounds to me like "yearly"


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