[argyllcms] Re: DIY color target for photographers
- From: Graeme Gill <graeme@xxxxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Sun, 16 Oct 2011 15:20:04 +1100
Lars-Daniel Weber wrote:
I want them for photos, not for scanners:
Anything created using a printer is likely to be less than optimal for general
photography. There are two related issues, gamut and spectral similarity. A
printer
typically uses a small number of inks (typically CMYK), and this both limits the
gamut and the spectral shapes used to create the colors. A printed color may
appear
to be the same as one you might find in a photographic scene, but in fact might
be
composed of quite different spectra. This is important when the object of a
camera
profile if the camera sensor spectral sensitivities are different to the human
eye
(which is typically the case).
So making a high quality chart intended for camera profiling is no easy task.
For each
test color you really need to select a pigment combination that matches the
real world
color that it represents. The distribution of colors selected should also
represent the
distribution of colors as you will find them in the real world.
Graeme Gill.
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