Color blindness • Hacker News Board

Re: Color blindness

#131

Post by mavidser » Sun, Oct 04, 2020, 6:19 AM UTC

wglass wrote: post #9

Great article. Ummm... dumb question, but... stars are colored? (Color blind poster here).

A color-blind poster here - this month has been the first time that I've noticed colors in stars (or planet, specifically).

Mars is very close and red these days, which I hadn't noticed before. I got quite giddy when I first saw a "colored dot" in the sky a few days ago and now most of my evening runs are motivated by getting a glimpse of the bright red planet. :)

A few weeks more until it starts rising early and isn't distinguishable anymore.

Re: Color blindness

#132

Post by setr » Sun, Oct 04, 2020, 6:20 AM UTC

withdavidli wrote: post #119

Fnoord wrote: post #96

Earlier quoted context omitted.

Do you reckon AR glasses fix this issue?

Not sure why you're getting downvoted. This was my first thought. The posts above mention using an app to read RGB. An overlay using AR would bring immediate value, I would think. My colorblindness is mild. Can tell most colors but fail the petri dish color test around round 3-4, nothing pops out at me.

It seems to me the simplest thing would be to have an app that renders the camera's reds as blue or something

It would at least suffice for these obvious kinds of things

Re: Color blindness

#133

Post by djaychela » Sun, Oct 04, 2020, 6:37 AM UTC

kabdib wrote: post #8

I'm r/g colorblind, and suddenly the indistinguishability of small colored objects makes sense now. Wow. Okay then. I hate multicolor LEDs with a passion. Those little amber or green dots look identical to me, even when you put them side by side. I use a phone app that uses the camera and shows me RGB values at a reticule. I've gone through rack and racks of equipment with that app, looking for things like dead drive…

I, too, am r/g colourblind, and don't know anyone else who is. Multicolour LEDs have always been a problem for me, and my gf can't believe that I can't read them... I also have issues with the UI of one of the apps I use regularly (wavelab) as the master section on/off is the wrong shades of red and green, so that's a problem.

Thanks to everyone for posting in here about it - I no longer (at 49!) feel like I'm the only one in the world who has this issue with LEDs in particular.

Re: Color blindness

#134

Post by djaychela » Sun, Oct 04, 2020, 6:50 AM UTC

sergeykish wrote: post #69

garaetjjte wrote: post #58

Interesting thing about people with deuteranomaly, is that in some situations we can utilize luminance and S-cone data better than most people with normal vision. That's how Ishihara hidden plates work (numbers that are visible only with color vision deficiency). But some normal trichromats can also read these hidden plates: https://jov.arvojournals.org/article.aspx?articleid=2135713

That's not how I read it. Normal trichromats see noise on L/(L+M) axis, for red-green color vision defective that axis is L/(L+L). We use S/(L+M) axis and luminance differences. Some normal trichromats can see through that noise. To understand how it feels lets compare with a superior vision of birds [1]. "That bird is mostly black", I see what it does not see. With normal vision colors pop out. I've checked once emu…

There have been plenty of times where I (r/g colourblind) have been able to see paint mis-matches on red coloured cars where people with normal vision haven't seen an issue, and I've been able to tell at a distance which panel has been refinished. I think the input/output curve of my red perception is non-linear compared to normal colour vision, and while on a lot of that scale it is a deficiency, in some situations, I have improved sensitivity.

Having said that, I'd trade in a heartbeat, so I could see bloody charging LEDs properly.

Re: Color blindness

#135

Post by slim » Sun, Oct 04, 2020, 6:52 AM UTC

  I see very little color in the stars

I can't see any color in the stars either. All of them are white. Are you people seeing colored stars ?

Re: Color blindness

#136

Post by yongjik » Sun, Oct 04, 2020, 7:01 AM UTC

slim wrote: post #135

I see very little color in the stars I can't see any color in the stars either. All of them are white. Are you people seeing colored stars ?

I'm not colorblind, but the only colored star I remember seeing is Betelgeuse - it's bright and easy to find. Mars is also usually reddish but it keeps moving, so it's harder to find (for me) - also it's not a star.

I think seeing the color of stars is more a question of how dark your night sky is, and how many stars you recognize.

Re: Color blindness

#137

Post by scbrg » Sun, Oct 04, 2020, 7:14 AM UTC

zapdrive wrote: post #106

kabdib wrote: post #8

I'm r/g colorblind, and suddenly the indistinguishability of small colored objects makes sense now. Wow. Okay then. I hate multicolor LEDs with a passion. Those little amber or green dots look identical to me, even when you put them side by side. I use a phone app that uses the camera and shows me RGB values at a reticule. I've gone through rack and racks of equipment with that app, looking for things like dead drive…

You wrote co-worker cow-orker TWICE!

http://catb.org/esr/jargon/html/C/cow-orker.html

Re: Color blindness

#138

Post by saagarjha » Sun, Oct 04, 2020, 7:50 AM UTC

jgauth wrote: post #60

kabdib wrote: post #8

I'm r/g colorblind, and suddenly the indistinguishability of small colored objects makes sense now. Wow. Okay then. I hate multicolor LEDs with a passion. Those little amber or green dots look identical to me, even when you put them side by side. I use a phone app that uses the camera and shows me RGB values at a reticule. I've gone through rack and racks of equipment with that app, looking for things like dead drive…

As a kid, before I even knew I was colorblind, I remember experiencing this with my Nintendo DS’ battery LED indicator. I believe it would show green-yellow-red, but I could never tell the difference just looking at normally. I would instead bring it right up to my eye, thereby filling up my entire field of view and I could suddenly tell what color it was. This article finally gave me insight as to why.

Are you sure it ever turned yellow? I can’t recall it ever doing so. Then again, maybe I am more colorblind than I thought I was…

Re: Color blindness

#139

Post by saagarjha » Sun, Oct 04, 2020, 8:01 AM UTC

jedimastert wrote: post #123

kabdib wrote: post #8

I'm r/g colorblind, and suddenly the indistinguishability of small colored objects makes sense now. Wow. Okay then. I hate multicolor LEDs with a passion. Those little amber or green dots look identical to me, even when you put them side by side. I use a phone app that uses the camera and shows me RGB values at a reticule. I've gone through rack and racks of equipment with that app, looking for things like dead drive…

Just to clarify (for my own edification) If you look at the colors #FF0000 (red) and #00FF00 (green) does one look greyish or do they both look like the same color? Also, apparently this is news to many r/g color-challenged people: peanut butter doesn't look green to every one else. It looks brown (which I don't know if a separate color to you)

I am red/green colorblind. I actually knew about this because they tested for it the first time I got glasses, and it came up there. But for years afterward I never really thought about it; I’d be able to tell basically every color and only falter on some that seemed ambiguous to me but others had an easier time distinguishing–but I never ascribed this to colorblindness; I just thought it was I who didn’t know the colors well enough. For both of your examples: pure red and pure green are very clearly, obviously distinct colors. I don’t think peanut butter looks green at all, it’s clearly a shade of light brown. Really, the only way I can describe the difference I see is this page: https://en.wikipedia.org/wiki/Color_blindness#Signs_and_symp.... There’s a picture of a landscape with various colorblindness filters applied to it. The first two images look identical to me.

Re: Color blindness

#140

Post by saagarjha » Sun, Oct 04, 2020, 8:05 AM UTC

thaumasiotes wrote: post #129

loeg wrote: post #27

I've got mild red-green colorblindness (less severe than the author's); this article is great, and goes into much more detail than I knew beforehand. If I could add some suggestions to the author's at the end: * First, if you have the option of using one or the other, do so. Like, you can use red, blue, yellow, purple, and black for lines on a graph before you even need to find an additional color like green. * Secon…

> First, if you have the option of using one or the other, do so. Like, you can use red, blue, yellow, purple, and black for lines on a graph before you even need to find an additional color like green. I don't see this advice getting much uptake. First, green isn't a second thought for people with normal vision. It's a first thought. I can understand how this wouldn't be true if, to you, it didn't exist. Second, the…

> Third, a friend of mine with red/green colorblindness always complained that he couldn't tell the difference between blue ("rare") and purple ("epic") items in World of Warcraft.

I call things that are apparently clearly blue “purple” a lot–I assume some sort of overcompensation of some sort. It’s strange how we adapt, isn’t it?