Re: Nikon and SRGB
Re: Nikon and SRGB
- Subject: Re: Nikon and SRGB
- From: Rob Galbraith <email@hidden>
- Date: Fri, 03 May 2002 13:17:06 -0600
Hi Ed,
In regards to your message:
>
> << If you open a straight-off-the-camera D1X JPEG or TIFF into PS 5 through
>
> 6,
>
> it will not have a colour space associated with it. That's because the
>
> camera doesn't tag the files, at least not with ICC profile info, to
>
> indicate anything about the colour space used for processing.>>
>
>
While this is true for jpg & tiff, NEF files, which are indicated are RAW
>
files, do seem to be tagged with one of the two available modes. At least
>
when sRGB mode is set in camera, and the file is opened is PS 5.5 with WS set
>
to Adobe RGB, you get a conversion prompt from Nikons profile. Therefore,
>
are they truly RAW or do we have two "RAW" flavors (Mode I or II)?
If you attempt to open a D1X RAW .NEF file directly into Photoshop, Nikon's
Photoshop plug-in is invoked. It looks at a separate, non-EXIF marker that
indicates what mode the camera was set to, processes the image data
accordingly, then when it's done it tells Photoshop what colour space it's
in (ie Nikon AdobeRGB). So, as you note, what I described as being true of
in-camera processed JPEGs and TIFFs is not true of NEFs opened into
Photoshop through the Nikon file format plug-in.
The RAW image data in the D1X NEF is still just that, however: RAW. That is,
if one examines the data in a NEF of the same photo shot on sRGB or
AdobeRGB, the numeric values representing individual pixels will be the
same. The same is true if the various white balance and tone compensation
settings are changed. This isn't true of all cameras, but as far as I've
been able to determine, D1X RAW is RAW, and only one flavour of it.
>
If that is the case, could you not capture a profile target in NEF mode, with
>
one of two flavors of RAW and create a custom profile; shoot in tiff with
>
the same (I or II) mode setting and convert upon opening from the created
>
custom profile to a working space correspondinng to the mode (I or II) set in
>
the camera?
I think your basic question is moot if you accept the RAW is RAW argument,
yes? Regardless, though, it is possible certainly, even if shooting JPEG or
TIFF, for one to simply know that the camera was set to Mode II AdobeRGB and
act accordingly when opening these photos into Photoshop, regardless of how
the particular version of Photoshop responds. Or, to assign a custom profile
instead for that camera, then use that as the source of the conversion to
the preferred editing space, like AdobeRGB. Or, to embed a profile into all
source photos that is correct, even before opening them into Photoshop.
Or....well, the possibilities are endless.
-Rob
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