blue,shades,color,colour,bands,optical illusion,illusion Shades of Blue optical illusion

Shades of Blue optical illusion

posted by arvana

2 months ago • 3559 views

tags: blue, shades, color, colour, bands, optical illusion, illusion

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Comments

Neat.

I was pausing and playing the video to see the exact moment my brain failed when I noticed something even more odd. When he drags the pencil from one boundary to the other the colour darkens on the left side of the pencil first. Its almost as if he is dragging a shadow across the paper.

written by Jinx | 2 months ago | CH

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I got the whole flag to look one shade by staring at the center line keeping my eyes still. Try it.

written by redyellowblue | 2 months ago | CH

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Huh, this must be some sort of retinal blue-yellow channel adaptation. That's a cool effect. Nice demonstration.

written by bmacs27

| 2 months ago | CH

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When he removes the pencil, rather than "popping" back in, the separating line gradually "reappears." Stupid brain, outwitted by a bloody #2!

written by PHJF

| 2 months ago | CH

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dude its like the matrix!

written by deathcow

| 2 months ago | CH

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Actually, the delayed color change in the first move is caused by video compression, watch in HD and the effect is still there, but not as much. If you watch the lowrez , you will notice small black artifacts at the top of the paper in the first second after he moves the pencil.

written by BicycleRepairMan

| 2 months ago | CH

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When I stared at it I saw a 3D stegosaurus.

written by southblvd

| 2 months ago | CH

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I was kinda noticing how, to me anyway, the shades actually look like gradients (each panel, not the whole thing) without the pencil, darker on the left side than the other.

written by Payback

| 2 months ago | CH

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If you cover all 3 borders simultaneously, you'll see that all 4 rectangles are the same color! Looks like the borders are the only "illusion" here

written by Tymbrwulf

| 2 months ago | CH

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http://en.wikipedia.org/wiki/Cornsweet_illusion

written by berticus

| 2 months ago | CH

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*brain failure

written by xxovercastxx

| 2 months ago | CH

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Adding video to channels (Brain) - requested by xxovercastxx.

written by siftbot

| 2 months ago | CH

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Not to be picky, but this is actually a retina failure.

written by bmacs27

| 2 months ago | CH

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>> ^Payback:
I was kinda noticing how, to me anyway, the shades actually look like gradients (each panel, not the whole thing) without the pencil, darker on the left side than the other.

That's because of the mach band illusion (pointed out in that link posted by berticus). The mach band illusion can be seen with any slight step change. The cause is well worked out and has to do with the fact that the retina primarily encodes contrast instead of luminance. What happens is that the edges are amplified making the adjacent side appear brighter/darker accordingly. As you move away from the edge, you perceive the appropriate brightness. That creates the gradient effect you pointed out.

written by bmacs27

| 2 months ago | CH

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