#1 By: Cory Doctorow, December 7th, 2013 15:11
#2 By: Jonathan Roberts, December 7th, 2013 15:19
Interesting take on this one:
I know how it works, but my brain doesn't. Gets me every time.
#3 By: Preston, December 7th, 2013 15:30
#4 By: Preston, December 7th, 2013 15:34
If you stare at a checker board long enough you start to see a fish..........
....... Keep looking.........
#5 By: Jonathan Roberts, December 7th, 2013 15:41
What the... GET OUT OF MY HEAD!
#6 By: Nadreck of Palain 7, December 7th, 2013 15:48
Don't get it. With my finger across the middle it looks exactly the same except now my finger's in the middle. What's supposed to change?
#7 By: Zachary Johnson, December 7th, 2013 16:14
I don't see it either. Top looks darker. Cover seam, and top still looks darker. I feel like this illusion is just being presented wrong because the real surprise is that the solid bits away from the gradients are actually the same shade of gray.
I like the checkerboard setup a lot more.
#8 By: millie fink, December 7th, 2013 17:11
Saw that on Kottke, didn't work for me there either. What causes some of us not to see the topical delusion?
#9 By: SamSam, December 7th, 2013 17:48
Maybe the instructions are unclear? In any case, it worked well for me.
The image looks like it's a 3D shape, say an open ring box with its hinge pointed towards you, with the top half dark and the bottom half light. When you cover the seam with your finger (including the shadows) you see that both halves (except for the shadows, now covered) are exactly the same shade of gray.
The point of the illusion is to show you that perception happens not in the eyes but in the brain. The brain processes the image, and it knows that the bottom half is in shadow, and so when it sees the grey in the bottom it automatically makes us see a lighter color, because it's interpreting what the color would be in full light.
#10 By: aurora50, December 7th, 2013 17:48
I had to tilt my laptop to get the effect that, with the seam covered, the top and bottom were the same shade of grey...so I am not sure quite what is going on.
#11 By: SamSam, December 7th, 2013 17:53
Since they are, in fact, the exact same shade of gray, you shouldn't need to tilt your laptop. Maybe not enough of the seam was covered? I held my finger in the air, not right on the screen.
Tilting your laptop screen will darken the light colors, so decrease the contrast, so will make shades all look like the same gray -- but in this case that isn't necessary.
#12 By: Brad Zimmerman, December 7th, 2013 18:42
Like typos that our brains ignore because we know what the correct spelling should be, this "illusion" only works because it is wrong (more or less impossible in real life) and our brains are "fixing" it for us.
#13 By: Gloster, December 7th, 2013 19:13
Well, didn't work for me either, perhaps because the two fields are not actually identical. The top panel has highlights near the round edges, whereas the bottom one is practically uniform. If I squint just right, I can convince myself that the core plateau color is the same, but the two objects nevertheless remain distinguishable which takes away a lot of the effect.
#14 By: aurora50, December 7th, 2013 19:54
There is sort of a 'meta' component to this, no?
we all see through various 'screens'...and some screens are clear and some are clouded...and some take manipulation to see clearly...hmmm.
#15 By: Jon Sowden, December 7th, 2013 21:43
Came for the checkerboard, leaving satisfied.
#16 By: Deirdre, December 7th, 2013 21:45
Josef Albers’ Interaction of Color app is a fun black hole of time in which you can create these sort of illusions. Or get the book and some Color-aid paper.
#17 By: Sam Paul, December 8th, 2013 02:55
The instructions are unclear.
I read it as cover the seam of the objects. While it should be "cover the entire horizon line" of the picture.
Which isn't possible with just a finger on a normal sized monitor at the resolution shown.
#18 By: Jacqueline, December 8th, 2013 06:28
For this one you don't have to cover your screen
#19 By: Daneyul, December 8th, 2013 07:19
Didn't work for me at all just covering the seam (shadowed places too). Waaay too many other things going on including the sky, ground, and other shadowed areas on the objects to still throw off the eye.
To work for me, I had to block the top and bottom and sides of each square. Making two "V"s with my fingers, perpendicular to each other, did it. The two flat sections that peek out do indeed look the same color then.
#20 By: Dudlebug, December 8th, 2013 08:28
There would also be a similar white highlight on the grey top if both parts were the same color in the light scenario described in this image. There are also imaginary white/ black environment reflections on the sides of this thing that have nothing to do with the environment/ lighting in the image.
This isn't really even an illusion. It's an observation of the type of light/ color relationships artists painters and illustrators deal with on a daily basis. All this image illustrates is that the color white turns grey when in shadow. Is that supposed to freak me out?
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