This image doesn’t contain a single red pixel. You perceive red because of your brain perception (color theory)

55 points · 22 comments · view on lemmy.world

22 Comments

onlyhalfminotaur@lemmy.world · 26 pts · 30d (2 replies)

Ok now define "red"

owenfromcanada@lemmy.ca · 4 pts · 30d (1 reply)

Any color where the red level is higher than either the green or blue values.

ccunning@lemmy.world · 11 pts · 29d

Iconoclast@feddit.uk · 22 pts · 30d (1 reply)

And this doesn't contain a single yellow pixel. Take a magnifying glass and zoom into your monitor if you doubt it.

Fluffy_Ruffs@lemmy.world · 5 pts · 30d

🤯

hdsrob@lemmy.world · 9 pts · 30d (1 reply)

Saw the thumbnail and went "I don't see any red"... then the full size image loaded and the strawberries triggered it.

logi@lemmy.world · 1 pts · 30d

Same. When I recognized the shapes to be strawberries, they slowly faded to red.

paraphrand@lemmy.world · 7 pts · 29d

I wonder if compression algorithms ruined this an injected some red.

Grimy@lemmy.world · 7 pts · 30d (2 replies)

If you zoom in, there's clearly red pixels.

Cherry@piefed.social · 9 pts · 30d

Yeh there are a lot of greys in the red but also some red tones for me for me that purple tone was from the picker.

image

usualsuspect191@lemmy.ca · 3 pts · 30d

Definitely

ccunning@lemmy.world · 6 pts · 30d (3 replies)

Does this mean all the pixels are x00nnnn? Or is there a threshold (absolute or ratio) where a pixel is considered “red”?

owenfromcanada@lemmy.ca · 4 pts · 30d (2 replies)

No, it means that if the colors are 0xRRGGBB, the RR value is never higher than GG or BB (checked in an editor quick).

ccunning@lemmy.world · 6 pts · 30d (1 reply)

owenfromcanada@lemmy.ca · 3 pts · 29d

Good catch, though that's pretty dang close to gray. But technically some sort of red.

farmgineer@nord.pub · 6 pts · 30d (4 replies)

Nothin in there looks red to me, but I am mildly colorblind

p_consti@lemmy.world · 6 pts · 30d (3 replies)

The strawberries look very red to me, and some of the boxes around have some redish tint (more toward purple)

farmgineer@nord.pub · 4 pts · 30d (1 reply)

The right too swatch is blue-green, the bottom right green with some blue, and the others grey or brownish. I would probably believe someone if they told me middle right was a very browny red, but I don't really see any red there. Strawberries are not al all red to me.

celeste@kbin.earth · 1 pts · 30d

That's interesting! Your colorblindness in this case means your brain isn't lying to you like mine is about red being there.

hdsrob@lemmy.world · 1 pts · 30d

If I see the entire picture, the center right and bottom left panels look red(ish) to me, along with the strawberries.

But if I scroll the portion of the picture that has the strawberries in it up so that I only see the crust, then those two go back to being a shade of grey.

IWW4@lemmy.zip · 2 pts · 30d

Thats really cool!

I see a lot of red in that picture.

TomMasz@piefed.social · 1 pts · 29d

I'm red/green colorblind, it looks gray with a slight red cast to me.