RE: Humans (and cameras and scanners) do not have a color gamut (?)
RE: Humans (and cameras and scanners) do not have a color gamut (?)
- Subject: RE: Humans (and cameras and scanners) do not have a color gamut (?)
- From: Roger Breton via colorsync-users <email@hidden>
- Date: Tue, 7 Jan 2020 16:55:53 -0500
Henry,
I'm not a digital camera designer but what don't you understand about the fact
that a camera is a sophisticated "light detection system"? It's pretty much a
color measuring instrument (others could correct me) but an i1pro does not have
a "gamut" per se or a filter-based colorimeter, they take light in and spit
out numbers in response -- same with digital cameras, they take light in and
spit out sets of RGB numbers. Surely there's a lot of math going on inside the
CPU of a Nikon or a Canon or a SONY camera, like estimation of scene illuminant
by which tonal responses are likely adjusted. There may very well be some kind
of "model" of various 'natural scenes' because, just like during the creation
of output profiles, it helps to have some kind of "assumptions" as to what
ranges of colors or luminances are to be expected. But is that a"gamut" per se?
A gamut is a physical construct, it comes from something measurable that have
"limits".
I hope that helps...
/ Roger
-----Original Message-----
From: colorsync-users
<colorsync-users-bounces+graxx=email@hidden> On Behalf Of Henry
Davis via colorsync-users
Sent: Tuesday, January 7, 2020 4:45 PM
To: email@hidden
Subject: Re: Humans (and cameras and scanners) do not have a color gamut (?)
When the “cameras absolutely do not have gamuts” quote moves from “some
response” of a camera to “color accuracy” I get lost. It sounds as though
there is a ruler(the display) measuring a non-dimensional entity for accuracy.
The quote seems to assume that the camera has infinite perfection but it’s up
to some mysterious other entity to prove that it doesn’t have infinite
perfection.
I’m now losing my fight to understand - I was pretty much following the
previous threads about the distinction between color and numbers but this curve
ball has me swinging and missing. I believe the quote was supposed to bring
some clarity but it didn’t work for me. Maybe there’s another way to explain
not having a gamut that will help.
Henry Davis
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