Hello,
thanks a lot for your detailed answer.
My understanding of the way a scanner works is that there's no criticalintermediate store of sensor data, so nothing like camera raw to preserve.
I have also read there is no idea of a scanner-native space beyond theinternal choices used to convert the devices spectral response traits into
In practice, most of the world fits into sRGB ...
--- Begin Message ---Hermann-Josef,
- From: "Wire ~" <wire@xxxxxxxxxxxxxxxxx>
- To: <argyllcms@xxxxxxxxxxxxx>
- Date: Sat, 5 Dec 2020 22:35:31 +0100
You are on the right general track, your understanding is correct.
Here is more food for thought:
• Your creative intent when you scan is best handled by delivering the image
into a working space that's covered by your calibrated display. And in your
case it is. and will be if you convert to sRGB. Most of us assume that the
display is our primary window for determining the proper rendering. It doesn't
have to be, but you would have to reason through another choice, which by
common sense is only productive if you have the reasons :)
My understanding of the way a scanner works is that there's no critical
intermediate store of sensor data, so nothing like camera raw to preserve. I
have also read there is no idea of a scanner-native space beyond the internal
choices used to convert the devices spectral response traits into RGB data.
There very much is the idea of scanner profiling, which can help get film
response into a working space with good fidelity. This is a worthwhile pursuit.
It also maybe can be deferred if you run the scanner in a very repeatable way.
So the idea of a "scanner space" can emerge in the sense of a list of
repeatable capture settings that can guide future profile creation and
application to film captured the same way. You have to apply the necessary
discipline to make it work, and defer artistic rendering to a distinct step
after capture.
There is a possible trade-off — which is probably so incremental as to be
ignored — of sacrificing some scanner sensitivity that could make the very most
of a problematic image for the consistency and range requires to capture all
images.
• Re general presentation vs archiving: today you still cannot count on color
mgmt to cover for you. As an example, I am working w blogging SW that renders
images into thumbnails for various purposes of UI and presentation and the auto
generation doesn't always respect the image profile. OTOH most devices will
respect profiles, so it's always something. The safest way to go is sRGB image
state.
Adobe RGB only offers a green advantage over sRGB, which in practice
becomes cyan limit, because worldly greens are well covered by sRGB. My actual
world is more likely to include reds outside of sRGB.
Display P3 is a better compromise for any advantage of extended gamut and
balanced degradation if image space gets ignored by primitive presentation. So
if you accept the hazard of improper rendering, Adobe RGB is a less desirable
wider gamut. And if you want to avoid hazard then use sRGB so whole thing is
moot. Adobe RGB is a very awkward space.
In practice, most of the world fits into sRGB and the parts that don't are
not memory colors, so hazard of improper image state rendering far outweigh
hazards of gamut limits
HTH
/wire
On Sat, Dec 5, 2020 at 07:56 Hermann-Josef Röser
<posts@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
The linear scans are, of course. But the final product should be in AdobeRGB or
sRGB.
Hermann-Josef
---------- Forwarded message ----------
From: Mark Wilhelmsson <markanini@xxxxxxxxx>
To: <argyllcms@xxxxxxxxxxxxx>
Cc:
Bcc:
Date: Sat, 5 Dec 2020 16:36:37 +0100
Subject: [argyllcms] Re: sRGB or AdobeRGB ?
Ideally they should be stored in the scanners native color space.
On Sat, Dec 5, 2020 at 10:29 AM Hermann-Josef Röser
<posts@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
Hello,
currently I am digitizing my slide collection. I am using a calibrated EIZO
monitor with AdobeRGB gamut thus render my scan into AdobeRGB colour space.
The question now is, what to do if I use these images on another monitor
with only sRGB or a beamer? Do I have to batch-convert all the images from
AdobeRGB to sRGB?
Displaying AdobeRGB images on a colour-managed sRGB device I would not
expect a problem and expect no difference on image quality to using a
version converted to sRGB before displaying them. Is this correct or do I
misunderstand something here?
Displaying on a non-colour-managed device is a different issue, of course.
Many thanks in advance and best wishes
Hermann-Josef
--- End Message ---
