- cross-posted to:
- opticalillusions@feddit.nl
- cross-posted to:
- opticalillusions@feddit.nl
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Red is complimentary to cyan.
If the cyan were switched with yellow, the can would appear blue.
Also, it’s not our brains creating the red, it’s our eyes. They get exhausted of seeing the cyan and replace it with red.
Can you do that and post it?
Well color me impressed.
Grab your pitchforks gang. OP is selling us snake oil posts!!!
Now send this version (with the same unedited caption) to everyone.
Strange, I see the OP picture as red, but this one as black & white.
He’s right.
You guys never cease to amaze me.
so it would appear red even if it was another can?
yes, obviously
It’s curious that the thumbnail actually has red values for those pixels, making me think they’re cheating a bit with jpeg compression effects.
Huh, it shows up as black to me.
It depends on the size you are viewing it at. This works well on small screens but less well on large screens
Let’s hope it’s the size of the image and not the responding user’s revelation they are red green deficient lol
It’s not marketing, just colour theory. The same idea has been used by painters for ages.
It is when you use cova cola instead of, lolipop, santa, flag, flower or some other red object.
That’s so weird. You can stare at a pixel and go “yep that’s red”. Zoom in, still red. Zoom more, BOOM IT’S BLACK!
The “red” parts are white, but yeah it’s interesting
I am confident that is not correct, but every time I zoom in to test it, my brain explodes and I can’t tell.
I’m also lost. Because logically it should be the white, but I see a red and white striped midsection of the train and a red and white flecked can, so I think it must be coming from the black pixels.
Why is my brain making the train stripes red? I don’t know what color they normally are, which I assumed was the mechanism behind the coke can illusion.
Because our brains interpret colours and shading relative to their surroundings. That specific blue is on the opposite side of the colour wheel from red, so that relative lack of blue can be interpreted by our brains as red.
Remember that white is all colours present, so white next to white will have more red than white next to blue.
You’d get a similar effect if you stare at a bright blue version of the can for a while and then look at a blank white page or close your eyes. The after image isn’t the same colour as the thing you were staring at, it’s the inverse of that colour.
Nah, it’s still colour theory. Now it’s yellow, magic.
As a video editor, fuck Adobe lol
I’m right there with you, I just downloaded the first app I thought might let me shift hue.
No judgment for using the tool you used. I just always feel a need to say fuck Adobe lol. Recently got our production team fully in resolve, but unfortunately there is no suitable replacement for adobe audio enhance tool yet. Hoping resolve’s voice isolation tool can eventually supplant it.
I installed GIMP on my Android phone for changing aspect ratio of photos, but used it for hue, too
didn’t know it was on phone, thanks for the tip!
Jokes on you I zoomed in and out on the original and now the can appears white no matter what.
Its the second Coca Cola TM post ive seen since I joined lemmy.
The other one was yesterday.
This site has no protection against marketing aside from moderator action (and in this case OP is a mod). I’m not certain OP chose a coke can for that image or whether this was simply the first version of that illusion that OP has seen
I wonder if prolific posters are approached by advertisers. Is Lemmy big enough for them to bother?
Oh weird, I assume this is just because the white is relatively red compared to the cyan, right? As in if you took any image and coloured it in the same way then it would also look red.
Yeah, there seems to be a lot more going on here than just marketing. If you mask the logo, the red still works. I believe it has to do with the combinations of white/black, white/cyan, black/cyan and the relative size of the blocks to produce a red hue through complimentary color persistence or whatever it’s called.
Hand doesn’t look red tho
The hand has cyan in it
Brain uses expectations to decide what to fill perception with. you don’t expect hands to be the same red tone as cola cans.
I think it’s also the amount of blue overlay. If you zoom way in, the cola can has much larger chunks of uninterrupted white, whereas the hand has a lot more blue interspersed.
Nonsense. My phone screen uses red, green, and blue to make up each pixel. The white pixels have their red component all the way at full brightness. Therefore there is a lot of red in the picture.
You could also see this by opening up the image and looking at the red channel which would not be completely black.
Texts on computers is made this way, so use a magnifying glass on black white text in a word document (for example) and you’ll see lots of colors. zoom in using the computer and you will still just see black/white.
So that’s why I can’t print greyscale documents when my yellow ink is too low!
Ha ha nah thats because all (color) printers also print a unique pattern with yellow, so that anything from your printer can be traced back to it
Can plz anyone find a link (am at home with wrecked right arm)?
Yeah, that was the point of the joke
But you’re right, better leave a link, the more people know, the better
I just tried printing this image but it says my magenta is too low 🤔
Jokes on you, I’m moderately red green colorblind so I wouldn’t realize it if there was red present
Do you see the Coke can as a different color from the background?
I’m red green colorblind as well. I just see the background as white or a very light shade of grey. Someone else has made a post with a yellow can and in that one I see the background as yellow (which is basically the same as green to me, I have very little r in my rgb), especially the right side of the can.
Same here. Those colour fanatics are fantasising again I suppose.
I think there’s something more going on here than just “marketing”. Because if you look at the tiny thumbnail in the OP it’s very clearly red, and you can even load that thumbnail into an image editor and zoom in to see slightly reddish pixels.
So something happens when scaling this image that actually results in a red hue, and I don’t think my computers image scaling algorithms are also falling for “marketing”. I would guess it’s actually some kind of sub-pixel trick that makes it seem like there’s colors there which aren’t, and that’s why the image scaling algorithms also reveal the same colors you see.
Your mind compensates for the teal which makes the white look red.
then why are the other parts still white
The image has teal-black parts and white-black parts, the white-black parts look like they’re red-black
deleted by creator
It makes gray look red because it’s similar luminosity. White still looks white.
Still red with no logo.
White light has red in it. Cyan does not. We fatigue blue and green cones everywhere but the white can, and we only stimulate the red cones on the white can. The result is it looks red.
Thank you. I thought this was going to be like the dress.
The white and gold dress, you mean?
Exactly
Is this because our brains have been programmed to see Coca Cola can as red? Or does it have something to do with the way the black and white boxes are organized? (I.e. if it were a sprite can, it would still be red)
I think it’s a bit of both. The light blue color used is so called “complement color”, meaning it’s exactly the opposite on the color wheel to the Coca Cola red. Black and white pattern suggests to our brain to play with contrast. And of course we all know Coca Cola from all the marketing.
Btw, After staring at it for a while I can kinda switch between red and white at will. Anyone else?
Interesting :) And yes, for me it also became easy to switch once I was aware of the truth of what I was looking at.
If you look directly at the can you can see it as white, but if you look elsewhere and the can is only in your peripheral vision it seems to always be interpreted as red.
At the size it is on my phone screen it looks very red. Zooming in makes it look like the red switches to white.
Btw, After staring at it for a while I can kinda switch between red and white at will. Anyone else?
No, that doesn’t seem to work for me, but after messing with zooming in, I can absolutely see it’s white if I’m all the way zoomed in on the black and white pixels in the can, and then as I slowly zoom out, there’s a specific moment when there’s enough of the surrounding blue that the can suddenly turns red.
The can remains black and white in my perception as long as I’m sufficiently zoomed in on it without the background. It’s a pretty neat effect.
It’s effectively your brain doing automatic white balance, it sees everything being tinted cyan so it just sorta subtracts cyan from the area, which results in white being reddish
you can do this physically (by tiring out the colour-sensing cells in your eyes) if you stare at a colour for about 30 seconds then quickly look at a white surface, you should see the inverse of the first colour.
Someone did a color swap and the can looks blue when the cyan pixels are instead yellow
How come this comment isn’t clickable in the app, and you have to open a browser to see it?
Depends on the Lemmy app you use and your phone preferences for app opening certain links in different apps ( e.g. PayPal specific links may open in the PayPal app)
Thanks, I’m in voyager on Android. In the app settings, I can choose to open the link either “with default browser” or “in app”.
Even if it is set to “in app”, the app renders a browser window instead of just taking me to that comment in the thread.
Weird.
Try restarting your app. That can happen if an API request fails (or if you Lemmy instance isn’t federated with the target instance)
Ah this is a good point too, unfederated links could do it since the app wouldn’t know how to open it, I use sync and links usually work but occasionally will open in the browser.
The cyan is the one playing the trick. I can see the black and white nature without zooming when focusing on the logo or something. Sometimes it randomly changes from b/w to red
I have myopia so if I place the phone far from my face I can’t see that it is even a can… I still see a little bit of a red area there.
She’s right.
Damn i thought it was a shitpost at first
I need to grab a color dropper but I am sensing a little warmth from the White even when I zoom in
This is a screenshot of it zoomed in…
You tell me if the white looks warm
https://www.color-hex.com/color/fffcf9
Looks warmer than #ffffffff that’s for sure
There’s no disputing our minds are filling in red because we see a Coca-Cola can. But it does appear to me that there is a very very light thumb on the scale to make it easier
our minds are filling in red because we see a Coca-Cola can
Our minds are filling in red because of the cyan
Top comment explains it. It’s because of the cyan that it looks red. It’s the complementary primary color
I don’t know why you felt the need to send this when like 20 comments have repeated it and this happened days ago but ok lol
That doesn’t change anything but yes it does look a hair warm.
I think what we actually need is someone to take a picture of their screen with a microscope while the image is zoomed out.
Based on some comments I’ve seen, it seems likely this is just an artifact of how the red/green/blue pixel layouts work when drawing the edges of white things.
Edit: I don’t have something to check the actual display pixels, but I realized I could just rotate the image and see if the colors change, which they don’t. So this definitely seems like more of a white balance effect, similar to that old Gold/Blue Dress meme.
You can use a color picker*, and unlike the gold/blue dress meme we are all looking at the same image and don’t have to determine one singular source vs. shared ones that have changed due to screenshotting/compressing/people just messing with folks
You can’t use a color picker see color fringing due to subpixel rendering. (There’s tons of info about this for font rendering). Your display doesn’t map pixels 1-to-1 in most cases. But like I said in my edit, I’m fairly sure that part is irrelevant here.
The blue/gold dress was not related to screenshotting and compression. People were arguing about the color even when looking at the exact same image. It all depends on which color temperature the dress was lit with. Noone can know for sure, and your brain just picks one (maybe depending on the room you’re in).
It’s the same sort of deal as those rotating optical illusions. It’s possible to see it both ways, but your brain usually picks one and it’s hard to switch.
Screenshotting, compression, people screwing with people, different monitors, different phones, etc. all contributed to the confusion ultimately. It’s not accurate to say we were all looking at the same image with the dress. But yet those visual/mental phenomenons are also real.
I wasn’t saying everyone was looking at the same image. I’m saying the optical illusion still works when using a single image.
Sure but I never disputed that. I’m saying this effects are real and there was some confusion due to the above.
Maybe you also try replacing cyan to magenta and see what happens. Imo the warmth of white does not do anything much
Color dropper shows there is full red and blue/green are pulled back. It’s slight, but it’s there. Didn’t say it did much but clearly it was enough for me to notice lol
FFFCFCF9
I’m getting no hits for that do you mean fffcf9?
Yes. The first two symbols got interpreted as markdown
When its small thumbnail I can see it but when I look at the full size image I appear to be able to turn the effect off at will.
If I zoom in just a bit it’s white, turns instantly red at some point of zooming out.
The tipping point is wild
If you zoom in to see that it’s black and white, and then zoom back out again, it stays black and white. But if you look away for a bit to forget, maybe change the angle you’re looking at it, it turns red again.
For me zooming out changes it back to red.
I think it probably depends a bit on the color persistence effect. Like when you stare at something then look away, you see the opposite color. This effect probably requires the parts of your eyes that were looking at cyan to move over the white area and create red. So if you look at it without moving your eyes, it doesn’t work
It’s actually all just white light at different wavelengths, which tricks your brain into seeing different “colours”.
White light is the combination of all those wavelengths. It is only the combination that makes it “white” in exactly the same way that a smaller range of wavelengths are “red” or “blue”.
Making your brain do exactly what it’s supposed to do is a weird way is “tricking” it.
no actually it’s white light with different phase shifts and because the earth is flat, the surface temperature of the sun tricks your brain into thinking it is red
