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Why we're blind to the color blue

calebkruse.com

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Re: Why we're blind to the color blue

#91

Post by jbmny »

smusamashah wrote: post #65
skunkworker wrote: post #44

Earlier quoted context omitted.

This happens every wintertime for me as blue string lights are put up, and they always appear “fuzzy” compared to other colors.

I got dry eyes some time ago. Dryness gone but now I see starburst at night in headlights, neon signs and stars. Being unable to see stars as flickering dots anymore hurts me the most. Neon signs in particular if blue are totally whacky and unreadable until I go too close. I went to optometrist recently and they didn't understand why blue in particular and recommended a color blindness test which I obviously passed.…

May I ask how exactly your dry eyes led to degradation in vision? I've recently been struggling with mild corneal abrasions that leave me with something resembling a "starburst" in my night vision, and I'm suspecting it may be caused by dry eyes.

Re: Why we're blind to the color blue

#92

Post by anonAndOn »

emerged wrote: post #37
fotta wrote: post #20

Blue is my favorite color. Has my whole life been a lie?

Blue is my favorite color and it seems like whenever I call something blue somebody tells me it’s green. I don’t like green. I have no idea what to make of that.

Maybe it's the lighting?[0]

[0]https://en.wikipedia.org/wiki/The_dress#/media/File:Wikipe-t...

Re: Why we're blind to the color blue

#93

Post by sneusse »

ameetgaitonde wrote: post #90
jessejmc wrote: post #64

Earlier quoted context omitted.

Don't know about Yves Klein specifically but remember seeing this video from Vox: "Why these all-white paintings are in museums and mine aren't" [1] [1] https://www.youtube.com/watch?v=9aGRHOpMRUg

I like to wander around art museums, and on one visit, I shared a gallery with what seemed like a private tour group. One woman was conducting the tour for three people, when they stopped at one of these all-white paintings. She was describing the potential meaning behind the work, and noted that sometimes the artist expresses textures, or covers some background work. It's hard to describe, but I felt this sort of ab…

That's the missing piece! Now I know how to spend my next rainy day!

Re: Why we're blind to the color blue

#95

Post by Camillo »

Camillo wrote: post #10

Snell's work on optics would later be overshadowed by the GNU alternative, Fresnel.

I can't believe this awesome joke is getting downvotes. It's like pearls before swine, but I'm leaving it up so you can find out which amongst you are objectively bad people.

Re: Why we're blind to the color blue

#96

Post by Qub3d »

drcongo wrote: post #50

One of my favourite series in art is Yves Klein's blue work. For anyone unfamiliar, he found a blue that he considered the bluest possible blue [1], and went on a journey painting everything in that blue. I loved that he did this, and then eventually managed to get to an exhibition of his work at the Tate Modern and was absolutely blown away by it - it really needs to be seen in the flesh to appreciate it. There's so…

That's awesome. Looks like his hue is very, very close to YInMn blue, one of my favorite contemporary scientific discoveries:

https://en.wikipedia.org/wiki/YInMn_Blue

Re: Why we're blind to the color blue

#97

Post by tobr »

The author is wrong, that experiment doesn’t show anything about focusing. The blue channel in RGB is simply much less bright than the green, which means it has much less contrast, which means that manipulating it in various ways has less of a noticeable effect on the image as a whole. This happens to be true for blurring it, but also adjusting the contrast, inverting it, pixelating it, offsetting it, averaging it completely, whatever manipulation you can think of.

Re: Why we're blind to the color blue

#98

Post by bioplastic »

mrob wrote: post #33
crazygringo wrote: post #19

I don't believe the blurred images at the end have anything to do with eye focus, as the author suggests. After all, chromatic aberration is blurring of only a very, very small amount. The demonstrated seemingly negligible perceptual effect of blurring blue to a huge degree in a multicolor image doesn't seem to have anything to do with that, but rather the fact that we perceive primary blue as a much darker color tha…

See the very low coefficients for the blue channel when converting (gamma-compressed) RGB to luma. E.g. the common Rec. 709 standard assigns only 0.0722 weight to blue. Y' = 0.2126R' + 0.7152G' + 0.0722B'

Indeed, green contributes more. Example of the Y channel after blurring r/g/b: https://imgur.com/a/3p15Qe1

And colured versions: https://imgur.com/a/Knq2Ue3

(image source: https://en.wikipedia.org/wiki/Flower#/media/File:Flower_post...)

Re: Why we're blind to the color blue

#100

Post by jbluepolarbear »

pengaru wrote: post #88
jbluepolarbear wrote: post #63

Earlier quoted context omitted.

I’ve never met anyone without some astigmatism; especially, people with other vision impairment. Astigmatism is the number one cause of night blindness which is what you described.

> In Europe and Asia, astigmatism affects between 30 and 60% of adults. https://en.wikipedia.org/wiki/Astigmatism

I can’t actually verify that number presented in that paper. I’ve looked and that stat is attributed to that paper, but there’s no evidence that the paper said that. Plus the paper is pay walled so unverified.
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