Good morning Graeme,
thanks a lot for your confirmation and clarification.
Hermann-Josef
--- Begin Message ---Hermann-Josef Röser wrote:
- From: "Graeme Gill" <graeme@xxxxxxxxxxxxx>
- To: <argyllcms@xxxxxxxxxxxxx>
- Date: Fri, 5 Nov 2021 01:06:15 +0100
Hi,
Do I understand it correctly that cctiff converts the pixel values in thethe
input image to the pixel values in the desired output colour space using
two ICC profiles for input and output?
yes.
I would like to convert a "raw" scanner TIF file to the AdobeRGB colourI
space using the ICC-Profile for scanner+emulsion to compare this with what
get from the scanner software.
Is this then the correct usage:
cctiff -ir scanner.icc -ir AdobeRGB1998.icc input.tif output.tif ?
Yes, that should work.
I ask, since I get larger discrepancies between the output of cctiff andthe
scanner software than I expect from just the different numerics between
Argyll and the scanner software, which I would expect be on the order of
promille and not percent.
Depends on exactly how the scanner software is working, and exactly
which tables/intents of the profiles are used.
Note that if the scanner software is using auto white point or
auto exposure etc., then the values will certainly be different.
Cheers,
Graeme Gill.
--- End Message ---