Re: [TAN] Is saturated blue inherently dark?
Re: [TAN] Is saturated blue inherently dark?
- Subject: Re: [TAN] Is saturated blue inherently dark?
- From: Graeme Gill <email@hidden>
- Date: Sun, 07 May 2006 12:14:49 +1000
Giordano Galli wrote:
On May 6, 2006, at 2:13 AM, Graeme Gill wrote:
This need not be true for additive display devices though,
since it's possible for the blue stimulant to use more energy
Sorry, I should have been clearer. :)
Let's take a spiky monochrome spectral distribution, move its
main wavelength along the spectrum and suppose it describes a
light source's emission.
My question could be rephrased as "will the perceived blue
colours be *necessarily* darker than the green and red ones"?
This is equivalent to the constant energy spectrum light source
with reflective color sample case. It is worth pointing out the
additive display case, so that readers don't get too narrow a view
on the situation. Emissive displays usually have much lighter blues
than reflective output.
If I correctly understand the explanation given by Real World
Color Management (second edition, pages 22-24) you're talking
about cones in the first layer while I'm referring to opponent
pairs in the second layer.
It's not clear what you mean by "opponent pairs". Above the cones is:
the outer nuclear layer; the outer plexiform layer (cone and rod fibers +
horizontal connections); inner nuclear layer (bipolar cells); inner
plexiform layer (amacrine cells); layer of ganglion cells; layer of
optic-nerve fibers.
(There's lots of info. if you go looking. See <http://neuro.med.harvard.edu/site/dh/b9.htm>
for a picture. Notice that light enters from the bottom on that picture!)
Graeme Gill.
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