Re: Setting default RGB in OS X 10.4? (and Nikon Capture)
Re: Setting default RGB in OS X 10.4? (and Nikon Capture)
- Subject: Re: Setting default RGB in OS X 10.4? (and Nikon Capture)
- From: Richard Wagner <email@hidden>
- Date: Thu, 5 May 2005 11:25:13 -0700
Erik, Rob,
I believe Erik is correct. I used a whacked, blue profile as the input
to Capture. The image appears whacked even while editing it, before the
image is saved in any way, indicating that the image has been encoded
into the input profile colorspace. In fact, this whacked image can
then be saved ( and converted) to CMYK, and the system default CMYK
profile is used and embedded at the time of saving, indicating that the
image went into the wacked default RGB profile first, then was
converted to the default CMYK profile.
The "Color Modes" appear to act in essence as 5 different Camera RGB
profiles (e.g., different tone response curves) that are used to
convert the image to the preferred RGB profile space. The RGB color
space used will be either the one selected in Prefs, or is none is
selected there, sRGB is used for 4 of the five Color Mode settings, and
AdobeRGB is used for the fifth, to be determined by the Color Mode
setting, as labeled. When the CM pref is not selected (the usual
case), the Color Mode setting determines both the rendering "look" and
the editing/output profile.
Either way, the editing does not appear to be done in a Camera RGB
space, with a conversion to the output space occurring on Save.
--Rich
Rob Galbraith wrote:
"But, I'm not sure about your description of the encoding, or colour
space
handling, part of Capture's workflow. As I understand it, Nikon digital
SLR
cameras and Capture work the same way - all processing is done within
"Camera RGB," or rather the RAW data is run through colour matrices and
3D
look up tables and tone curves that aren't operating within an
output-referred ICC colour space like Adobe RGB or ProPhoto RGB. Then,
as a
final step, a conversion to a colour space - as set in either the
camera's
menus if it's a JPEG, or as set in Capture's CM prefs if it's a NEF -
converts the image data from Camera RGB to that chosen RGB or (in
Capture
only) CMYK colour space."
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