[argyllcms] AW: Re: Output too bright after profiling

  • From: Hermann-Josef Röser <posts@xxxxxxxxxxxxxxxxxxxxxxxxx>
  • To: <argyllcms@xxxxxxxxxxxxx>
  • Date: Tue, 14 Nov 2017 16:43:46 +0100

Hi Graeme,

perhaps it helps, if you have access to the files. I have placed them on
https://filebin.net/oorxckygw9ox2ily   for retrieval.

The content of the ZIP is as follows:

E100124_Kodachrome_SF.txt                                   reference data
Kodachrome_AV150_k.tif                                          raw scan
from which ICC-profile was created
Kodachrome_AV150_k_aRGB.tif                            scan converted to
Adobe 1998 (RGB)
Kodachrome_AV150_k_scanin.log                         log file from scanin
Kodachrome_AV150_k_p_h_x_colprof.log        log file from colprof
Kodachrome_AV150_k_p_h_x_profcheck.log  log file from profcheck
Kodachrome_AV150_k_p_h_x.icm                        profile created
  
I apologize if I do not use the correct terminology, but I am not a colour
scientist :-( .

With kind regards

        Hermann-Josef

--- Begin Message ---
  • From: "Graeme Gill" <graeme@xxxxxxxxxxxxx>
  • To: <argyllcms@xxxxxxxxxxxxx>
  • Date: Tue, 14 Nov 2017 12:15:49 +0100
Hermann-Josef Röser wrote:

Hi,

having created an ICC-profile from my Kodachrome target with Argyll
(mainly
standard settings, using -ax and -qh) and having applied this to the scan
of
the target, the resulting image becomes way too bright. Saving the image
in
AdobeRGB1998 and converting it to Lab with color transformer 2 in imageJ I
see, that the L values are far above the values in the reference file.

Since I have no idea what went wrong I would like to ask here for advice.

you haven't given any details (i.e. images, files), so it's a bit hard to
help. What was the self fit error from colprof ?
If it was high, did you check the chart recognition of scanin ? (i.e.
-dipn).

Cheers,

Graeme Gill.

--- End Message ---

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