Re: My Early Experiments in HDR
- From: davem@xxxxxxxxx (Dave Martindale)
- Date: Thu, 18 May 2006 07:55:04 +0000 (UTC)
Peter Chant <pete@xxxxxxxxxxxxxxx> writes:
Surely that is the effect of the origial image capture and post processing
rather than 24 bpp. However, is neon within the RGB colour gammit?
The intense red glow from excited neon gas in a clear tube might well be
outside the RGB gamut for any reasonable choice of RGB primaries. In
general, all pure spectral colours (the "spectral locus") from
single-wavelength light are outside any possible RGB triangular gamut.
Neon isn't a single wavelength (there are several lines) but the effect
is still a pretty saturated colour.
On the other hand, in most "neon" lighting you don't look at the light
from the excited gas directly. A gas mixture is chosen to produce
plenty of UV light, and then the inside surface of the tube is coated
with a phosphor that is excited by the UV. What you see is the phosphor
emission, which may include quite a broad range of wavelengths. These
colours might well be inside a RGB gamut.
Dave
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