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Where to Find the Colors Your Screen Can't Show You

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Re: Where to Find the Colors Your Screen Can't Show You

#61

Post by krick »

Really enjoyed the article, even though it's not a new topic to me, but still it was very interesting, very nicely written and I still managed to pick up a couple of new details.

To be fair to Jurassic Park, though, at least in the book the quirks of T-Rex's vision were explained by the details of genetic engineering (the base DNA used was some kind of amphibian, that allegedly had this problem — still not very scientifically plausible, but not quite as silly as in the movie). It goes a long way to emphasize that in the end these are not real dinosaurs, these are human-made abominations.

Re: Where to Find the Colors Your Screen Can't Show You

#62

Post by fortran77 »

I'm having an amazing time seeing colors now because I just had cataract surgery on my right eye (left eye next month) and have a clear lens again. If I compare my new right eye to my old left eye, I'm seeing colors I haven't seen in decades. Skies look blue with my right eye, gray with my left.

It's odd he noted Apple monitiers were "better". Maybe but marginally. Many options for other platforms, like Asus Pro Arte, beat it handily. And profressional color graders use Sony BVM series (Trimaster HX / OLED) for HDR or Flanders Scientific (FSI) DM/XM series or Eizo ColorEdge CG series. You won't see a single Mac at a movie studio for movie editing or color grading.

Re: Where to Find the Colors Your Screen Can't Show You

#64

Post by Aurornis »

szmarczak wrote: post #46
adrian_b wrote: post #21

While it is true that some saturated blue-green colors will never be reproducible with only 3 primary colors, the CIE 1931 chromaticity diagram used in TFA overemphasizes their importance, because human vision cannot distinguish many colors in that area of the diagram. In reality, the greatest defect of the sRGB color space, which is still too frequently the default color space, is that it is not able to reproduce ma…

There's color space and there's color depth. You may be using D-P3 with 8 bit, which is worse (less accurate?) than sRGB with 8 bit. And there's bandwidth. Your monitor may not be able to handle 4k 240fps 16 bit.

> Your monitor may not be able to handle 4k 240fps 16 bit.

10 bits per channel is the common target for higher color depth. The formats with 16 bits per channel are generally for image storage and allowing more bits for downstream transforms to avoid quantization. I don’t even know if there are video cards that would output 16 bits per channel, let alone panels for it.

Re: Where to Find the Colors Your Screen Can't Show You

#65

Post by Giefo6ah »

Stitch4223 wrote: post #36

The phosphor screen of a B&O MX8000 TV (a Philips tube) was unlike any I’ve ever seen in terms of cyan intensity. That was in 2020 while the tv is from the 1980’s. Playing Donkey Kong on it was totally different than any other screen. It was like a Morpho butterfly, but in the article it is pointed out that phosphor screens have limited color range. Triangles between screens may differ with tuning, but I suppose they…

The original 1953 NTSC standard specified phosphors with a way bigger gamut than sRGB, that were chosen to approximate the gamut of film projectors.

Original NTSC cyans are more saturated than even DCI-P3 cyans.

Typical CRTs use the cheaper, brighter phosphors specified by SMPTE C (the basis for the sRGB gamut) and a circuit that pumps the saturation to compensate.

It's likely your screen uses the better phosphors instead of a colour correction circuit.

Re: Where to Find the Colors Your Screen Can't Show You

#66

Post by ProllyInfamous »

limbicsystem wrote: post #30
rollulus wrote: post #22

What I missed in the article: the curves of the three “cone kinds” overlap. What if you could stimulate kinds of cones individually to see entirely new colors? Some people shoot layers at them into eyes. But you can also try this website: https://dynomight.net/colors/ (previously on HN but search fails me).

Through the magic of liner algebra it turns out that you can stimulate cones independently even with normal displays. Search for 'silent substitution'!

Also search for "impossible chimerical colors"

https://en.wikipedia.org/wiki/Impossible_color#Chimerical_co...>

Re: Where to Find the Colors Your Screen Can't Show You

#69

Post by subscribed »

Sophira wrote: post #19
somat wrote: post #16

Earlier quoted context omitted.

Would not the definitive answer to this be a computer screen. On one side you have an apple, illuminated by natural sunlight. it fills your eye with a rich texture of subtly mixed frequency's covering the whole gamut of visible and invisible light. On the other a picture of an apple composed of brutal pure frequencies only emitting at 430, 540, 570 Nm. Can you tell the difference?

That makes sense. I feel a little silly that that's not something I considered despite the article saying exactly that. I think I got caught up in the details.

No, no, the question was great. I read all the answers carefully and I feel a bit smarter now. Thanks for asking it!

Re: Where to Find the Colors Your Screen Can't Show You

#70

Post by qingcharles »

fmajid wrote: post #43

> Today, on your way home, look at the “green” light on a traffic signal. It’s not green. Independently from this, the names for colors are culturally determined. The Japanese call green traffic lights as 青 "ao", blue. Russians have different terms for different shades of blue.

This is a good point. Here's the article on the weirdness of blue/green in different cultures:

https://en.wikipedia.org/wiki/Blue%E2%80%93green_distinction...

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