Prev: Sharp RGBY Televisions
Next: Anybody know a decent scanner that works in Linux?
From: Greegor on 29 Mar 2010 05:29
Re: Sharp RGBY Televisions
On Mar 29, 2:50 pm, Robert Baer <robertb...(a)localnet.com> wrote:
RB > Salesmanship..at its "finest"...
RB > If you are really good, you can sell a
RB > refrigerator to an isolated Eskimo...

Thanks miso, Martin and Robert.
That's why I asked.

I was wondering if there was some
new caveat to the color theory. LOL

http://en.wikipedia.org/wiki/Additive_color

RGB

http://en.wikipedia.org/wiki/Subtractive_color

RYB

with mention of CMYK as in color printing.
From: osr on 29 Mar 2010 08:28
Having spent many years doing laser shows, I can chime in on this
one. On a older gas laser based system, I'd have 2 reds, 2 blues, 2
violets and 2 greens coming out of the modulator. I could sub in a
yellow for one of the greens or reds. Wavelengths were programmable,
the laser would output 15 or so lines, the modulator could pick any 8
of those. While a direct yellow is spectacular, if you have a choice,
you add in a violet. When you run the numbers, yellow adds roughly 10
% more area to the color gamut on the IEC chart. Adding the violet(s)
adds 30% or more. So if I had my choice of adding 457 nm violet or
568 nm yellow, I'd add the violet. If I want flesh tones, I'm adding
the violet. If I want colors you do not normally see in nature, I'm
adding the yellow.


With the monochromatic laser light, if we had a effect where we
wanted a yellow diffuse background and other colors on top, then we
would use the direct yellow, no combination of red or green matches
the beautiful golden color of 568 or 575 nm laser light. Part of
this can be ascribed to the effect that coherence has on the retina,
but still, I've yet to see a "synthetic" yellow that ever comes close
to a direct yellow.

With 8 bit RGB alone, I have a theoretical 16.8 million color
system. In reality, we would use 32 or 64 color palettes. More then
that is overload.

Laser has a gamut that blows away the best monitors. But when you
adapt it to consumer use, it tends to look like plain old CRT after
the engineering compromises to make it cost effective. A example,
well known in the laser biz, Tom Cruise's helmet is brown in TOP GUN,
in NTSC. In laser generated video or in the theatre on film, it
matches the squadron color, which is violet.

For those that are curious, Google polychromatic acousto optic
modulator, or acousto optic tunable filter.

Steve


From: Archimedes' Lever on 29 Mar 2010 15:52
On Sun, 28 Mar 2010 22:34:07 -0700 (PDT), Greegor <greegor47(a)gmail.com>
wrote:

>Is there any truth to their claim that adding Yellow to RGBY
>enables them to represent colors that RGB cannot?
>
>Are Yellows hard to produce with RGB Displays?

More accurate yellows could be argued for.

Their "color space" is probably a little bigger, but the content also
would have to have more info in it, and it doesn't. So, they have
created the first half of a new spin on an old science, but the rest will
have to follow.

Remember HDDVD?

Less likelihood for this to follow that same fiasco, however.
From: Archimedes' Lever on 29 Mar 2010 15:53
On Sun, 28 Mar 2010 22:45:46 -0700 (PDT), "miso(a)sushi.com"
<miso(a)sushi.com> wrote:

>Part of the problem with LCD is the backlight spectrum. The LED
>backlights are lower power, but the color is poor.

This is why OLED is in our true future, but Sharp wants you to think
about that future with pixels comprised of four sources, not three.

I like it. Sight unseen. Just knowing what is involved.

Look what the printer boys have done.
From: mike on 29 Mar 2010 16:05
Greegor wrote:
> Is there any truth to their claim that adding Yellow to RGBY
> enables them to represent colors that RGB cannot?
>
> Are Yellows hard to produce with RGB Displays?
>
Ability of the display is only part of the equation.
What about the source material?
If I'm watching a 5 year old DVD manufactured for a 3-color
display, will I perceive any difference.

Can't watch pictures of yellow synthetic fish all day...
 |  Next  |  Last
Pages: 1 2 3 4 5 6 7
Prev: Sharp RGBY Televisions
Next: Anybody know a decent scanner that works in Linux?