Optical Illusion Puzzle

pdurrant · 08-16-2011, 06:04 AM

Here's a great video of a real-life version of an optical illusion.

How did she do it?

(From Richard Wiseman's blog)

TGS · 08-16-2011, 06:22 AM

Brilliant find! Of course, she doesn't do it, we do

pdurrant · 08-16-2011, 09:06 AM

Quote:

Originally Posted by TGS

Brilliant find! Of course, she doesn't do it, we do

There is a deliberate deception in the video. There's no digital processing, but the setup has been very carefully done to make the illusion work.

Just ask yourself this:

Spoiler:

BenG · 08-16-2011, 10:56 AM

It's the checkershadow illusion.

http://web.mit.edu/persci/people/ade..._illusion.html

pdurrant · 08-16-2011, 10:59 AM

Quote:

Originally Posted by BenG

It's the checkershadow illusion.

http://web.mit.edu/persci/people/ade..._illusion.html

Indeed it is. But I don't think you've yet noticed how clever the video really is.

Let me put it this way.

Spoiler:

BenG · 08-16-2011, 11:04 AM

Yes, the video is even better since it's real and not a drawing.

Spoiler:

pdurrant · 08-16-2011, 11:09 AM

Quote:

Originally Posted by BenG

Yes, the video is even better since it's real and not a drawing.

Spoiler:

Yes, that's the real trick.

Spoiler:

WT Sharpe · 08-16-2011, 03:45 PM

Quote:

Originally Posted by pdurrant

Here's a great video of a real-life version of an optical illusion.

How did she do it?...

Quote:

Originally Posted by BenG

It's the checkershadow illusion.

http://web.mit.edu/persci/people/ade..._illusion.html

Exactly. Once for my own amusement, I made an animation of that illusion that shows the squares are indeed the same color. You can see it here (it may take a moment to load): http://wtsharpe3.com/Videos/Optical%...%20001%20e.mov.

Dylrob · 08-16-2011, 05:43 PM

Tricky tricky.Of course the real shadows give it away.

08-16-2011, 06:04 AM	#1
pdurrant The Grand Mouse 高貴的老鼠 Posts: 74,447 Karma: 318076944 Join Date: Jul 2007 Location: Norfolk, England Device: Kindle Oasis	Optical Illusion Puzzle Here's a great video of a real-life version of an optical illusion. How did she do it? (From Richard Wiseman's blog)

08-16-2011, 11:04 AM	#6
BenG Home Guard Posts: 4,730 Karma: 86721650 Join Date: Jun 2007 Location: Alpha Ralpha Boulevard Device: Kindle Oasis 3G, iPhone 6	Yes, the video is even better since it's real and not a drawing. Spoiler: And I assume the shadow is not a real shadow Last edited by BenG; 08-16-2011 at 11:06 AM.

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08-16-2011, 06:22 AM	#2
TGS Country Member Posts: 9,058 Karma: 7676767 Join Date: Feb 2010 Location: Denmark Device: Liseuse: Irex DR800. PRS 505 in the house, and the missus has an iPad.	Brilliant find! Of course, she doesn't do it, we do

08-16-2011, 10:56 AM	#4
BenG Home Guard Posts: 4,730 Karma: 86721650 Join Date: Jun 2007 Location: Alpha Ralpha Boulevard Device: Kindle Oasis 3G, iPhone 6	It's the checkershadow illusion. http://web.mit.edu/persci/people/ade..._illusion.html

08-16-2011, 05:43 PM	#9
Dylrob Murderous Mustela Posts: 10,234 Karma: 48000000 Join Date: Oct 2006 Location: The other land of schnitzel and beer Device: iPad M1 Pro, Kindle Paperwhite	Tricky tricky.Of course the real shadows give it away.