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Exactly what color are these strawberries ?


Posted on Wednesday, 1 March, 2017 | Comment icon 25 comments

What color are these strawberries ? Image Credit: Twitter / Akiyoshi Kitaoka
An intriguing optical illusion involving a plate of strawberries has been doing the rounds online.
Originally posted on Twitter by experimental psychologist Professor Akiyoshi Kitaoka, the photograph shows a plate of the popular summer fruits with a bluish color filter applied.

The question that has been puzzling the Internet is - what color are the strawberries ? At a casual glance they do appear to have a reddish tinge - but is this really the case ?

The answer, according to Kitaoka, is that the entire picture is actually made up of blue-green pixels, meaning that the reddish appearance of the strawberries is nothing but an optical illusion.




Source: Inverse.com | Comments (25)

Tags: Strawberries, Optical Illusion


 
Recent comments on this story
Comment icon #16 Posted by Noawareness on 2 March, 2017, 8:02
I'm super glad I was told which colour I should be seeing. This makes for great journalism and a really impartial story. Great work.
Comment icon #17 Posted by Silent Trinity on 2 March, 2017, 9:20
Surely this is inspired by the great "so-called" debate over this dress on social media? Do you see Black and Blue or White and Gold etc.....
Comment icon #18 Posted by paperdyer on 2 March, 2017, 12:17
No optical illusion here.  Just science fact.  A blue filer will only let blue light through it. You can do an experiment using a prism and a projector.  You split the light from the projector using the prism then put the colored filters either between the light and prism or in front of the prism and see what happens.  The filters need to be fairly dark but still transparent, typical of what you get in the stained glass kits.  I do a talk on this at our Color Schools we run for our customers.  I'd post it but it's too large.  If anyone's interested I can pdf it and email it to you.
Comment icon #19 Posted by XClashGames on 2 March, 2017, 12:25
Grey, the strawberries look grey and everything else looks blue. There is definitely 'red' pixels but that is likely down to the quality loss due to the copying of the image.
Comment icon #20 Posted by Chaldon on 2 March, 2017, 12:26
It's the normal white balance adaptation of the human eye. The brain interpolates all the colours it sees to "calculate" the colour of the light (neutral grey), all the other colours are then "calculated" by difference from that average colour. That psychologist probably knows too little about neurophysiology. This is how Gimp "fixes" the white balance using the same basic principle as our brains. The sunlight constantly changes its tint, but all the primates must be sure about colours, for example, to differentiate a ripe fruit from green or, say, blushed cheeks from pale, that's why the brai... [More]
Comment icon #21 Posted by FlyingAngel on 3 March, 2017, 12:31
Color is the sum of everything + light that hit our eyes. It's not about pixel by pixel
Comment icon #22 Posted by third_eye on 3 March, 2017, 12:41
Reminds me of this little experiment ... ~ [00.01:24] ~ Spoiler An example of the red spade experiment conducted by Bruner and Postman.   psyclassics yorku ca link   ~  
Comment icon #23 Posted by Parsec on 4 March, 2017, 15:53
Well, that's the power of your mind!   Next: how to bend a teaspoon.   Last step: how to make goats explode!
Comment icon #24 Posted by Farmer77 on 4 March, 2017, 16:05
How about lamb? Ive been craving a gyro 
Comment icon #25 Posted by Parsec on 4 March, 2017, 19:58
Well, if you also manage to cook it in the process, I don't see why not! 


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