[argyllcms] Re: Checking profile with GrangerRainbow
- From: Ben Goren <ben@xxxxxxxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Mon, 3 Oct 2016 16:57:54 -0700
On Oct 3, 2016, at 4:38 PM, Graeme Gill <graeme@xxxxxxxxxxxxx> wrote:
an input device typically is a different observer, and
so doesn't "see" color the same way as a standard observer.
For those who might (as I once did) have trouble warping your brain 'round
that...consider a printed yellow and a visual match on a computer display, and
maybe even another matching yellow from an LED bulb. All look the same but have
radically different spectra. Your camera might actually be able to see them as
Or, consider humans with various color deficiencies. You might see the numbers
in the chart of dots, but your nephew might not. There will be other charts
that you can't see the numbers but your camera will, and vice-versa.
The math all works out, but the underlying idea is that all these devices
(including your eyes) are basically spectroscopes, but with really low spectral
resolutions such that, rather than, say, a few dozen bands of a few nanometers
each (like in an i1), you've got three bands of dozens of nanometers each --
and the spectral characteristics of the three bands aren't the same.
...of course, our eyes (and cameras) have far more spatial resolution than any
spectroscope, even while their spectral resolution is extremely limited....
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