Your mind maybe playing tricks on you!

[Greg Baehman]

Your mind at work.

[Stan Hillis]

BS. I don't believe it.

[Greg Baehman]

BS. I don't believe it.

Okay, fill us in on the BS part of it.

[Dean Romig]

Why are we seeing red in the stripes to the left and to the right of the Coke can? I can see the mind thing of the mental association of the visual Coke can bet we have no such association to tell us those stripes should be red… ?


Below is a picture of my daughter Melissa on a hike yesterday.
Her hat is blaze orange, her eyes are blue, the leaf litter on the ground is brown, bronze, tan, yellow… and the small pine in the background is dark green.
Now that I’ve told you the true colors, does it change what you see in the picture?




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[Stan Hillis]

Our subconscious mind does indeed provide suggestions, but it does not control us. We can control it to our benefit or to our detriment. If our brain was "filling in the color", once we realized that, we could turn that off and it would look like Dean's photo. It would be like one of those optical illusions where you can see something in the "jumble" once you know it's there that you didn't see at first look.


There's lots of BS to be found on the internet, no offense meant towards you at all, Greg. Nothing should be taken as true just because someone made a picture/video of it.

[Greg Baehman]

So you can look at that picture, turn your brain off and see it in back & white?

[Dean Romig]

Let’s try this…

What do we see now?


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[Greg Baehman]

I'd say you took a B&W picture of it, similar to what you did with the pic of your cute daughter.

If we blow up the orig. Coke can image and zoom in. Do we still see any red?

[Bob Brown]

Well, I don't know why we see the red. I do know that when I take a washer with about a 3/8th inch hole and slide it over the picture on the screen the red disappears. The outside of the washer is big enough to block the image so the there is no suggestion of a coke can. Same image, same backlighting, different look. Make a hole in a piece of thick paper and try it yourself.

[Stan Hillis]

So you can look at that picture, turn your brain off and see it in back & white?

Nope, look again at my reply. I said "if". But, truth is it is not.

Dean's photo proves that the Coke can isn't triggering our brain to "see" red color. The Coke can is clearly still there in black and white, so why aren't we seeing it in red now? Because no red is there.

The fact is we see colors only because of the way our eyes were designed by God. We have things in our retinas called rods and cones. The retina sits at the back of the human eye. Your retinas are home to two types of photoreceptor cells: rods and cones. These specialized cells convert light into signals that are sent to the brain. This allows you to see, and to see color.

You have 20 times more rods than cones. Rods allow you to see in low light. Cones are 100% responsible for colour vision. Have you ever noticed how hard it is to see color in the dark? That’s because only the rods work in low light.

There are three types of cones: red, green and blue. Each type respond to different wavelengths of light. Long wavelengths stimulate red cones. Short wavelengths stimulate blue cones. Medium wavelengths stimulate green cones. When different combinations of cones are activated, you see other colors.

We are seeing the red in the Coke can because red is there, or, because long light wavelengths are reflected off it and we see what we call red, not because our brain is being "tricked".

[Andrew Sacco]

There is no red in the image. This has been well documented and there are variations of this image out there. Hit CTRL + and REALLY zoom in, there's no red.

[Andrew Sacco]

And if you STARE directly at the red, it becomes B/W. When looking away then back you momentarily see the complimentary color of cyan which is basically red.

[Andrew Sacco]

Taking a BW photo of the image defeats the purpose of the illusion since the cyan is the key to the whole thing. I can dig up my "Psychophysics and physiology of color vision" notes or look in my Adlers Physiology of the Eye, but there is no red. Also, the world is flat, but everyone knew that.

[edgarspencer]

Though I doubt such a person exists; if one had never seen a can of Coke, would he still see 'red'?

[Andrew Sacco]

Though I doubt such a person exists; if one had never seen a can of Coke, would he still see 'red'?

I suspect a person would given the cyan that floods the rest of the image. It's called lateral inhibition I believe where retinal cells determine edges and have an inhibitory response to one cell and excitatory response to neighbors.

https://www.animations.physics.unsw.edu.au/jw/light/complementary-colours.htm

[Stan Hillis]

So, your mind isn't tricking you (because you think a Coke can should be red), your eyes are.

I can buy that.

[Andrew Sacco]

So, your mind isn't tricking you (because you think a Coke can should be red), your eyes are.

I can buy that.

There is no trick. The flood of cyan and the relatively sparse area of no color makes you see the complimentary color due to lateral inhibition. If that cyan was all Red you'd see cyan in the coke can. Sometimes physics explains more than we able to believe.

[Andrew Sacco]

Don't believe me do this exercise, then when you see red where NO RED EXISTS we'll talk. :bigbye::corn::whistle:

This is what's happening.

https://www.animations.physics.unsw.edu.au/jw/light/complementary-colours.htm#2

[Dean Romig]

Didn't work for me Andy.... Nothing changed.

The eyes don't have the ability to define color - only the brain can define a color. The eyes simply send the image of the light rays to the brain.





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[Phil Yearout]

What happens if you’re colorblind?

[Stan Hillis]

Don't believe me do this exercise, then when you see red where NO RED EXISTS we'll talk. :bigbye::corn::whistle:

This is what's happening.

https://www.animations.physics.unsw.edu.au/jw/light/complementary-colours.htm#2

I looked at it until my eyes were watering and I never did see the Coke can.

[Larry Stauch]

What happens if you’re colorblind?

So we people that are red deficient don't see the red at all :)

Or do we?