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From: Greegor on 29 Mar 2010 01:34
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?

From: Robert Baer on 29 Mar 2010 15:50
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?
>
Salesmanship..at its "finest"...
If you are really good, you can sell a refrigerator to an isolated
Eskimo...
From: Martin Brown on 29 Mar 2010 03:57
miso(a)sushi.com wrote:
> On Mar 28, 10:34 pm, Greegor <greego...(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?

No. Take a bicolour red-green LED and feed it some AC. Once the light is
diffused you cannot easily tell the difference without a spectroscope.

The tricky bit is usually along the line of purples where the errors
from making flesh tones realistic are allowed to accumulate. There are
very few examples of subtle purple colours that people can recognise so
it normally doesn't matter. Getting realistic skin tones is important
though as the human eye is finely tuned to detecting unhealthy palour.

I used to love the way US newscasters drifted between ghoulish green and
purple in the days before they were clamped to pale orange leather. I
always believed it was a limitation of NTSC broadcast signals until I
lived in Japan where they manage to do it correctly.

Regards,
Martin Brown
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