[digiKam-users] color profile saving

[Daniel Bauer]

(sorry for unintended PM Maik, I clicked the wrong button)

Am 18.07.22 um 13:09 schrieb Maik Qualmann:
> Please look under Help-> Components dialog for the Exiv2 version. If it 
> is smaller than 0.27.1, color profiles in PNG files will be destroyed 
> when writing metadata.
> 
> Maik

Digikam uses 0.26...
But exiv2 27.5 is (also) installed on my system. How can I make that 
digikam uses it?

(I can save PNG's with embedded color-profile in Gimp, also using 
ImageMagick. So somehow my system can, but digikam not...)

(I don't know what would be the side effects and if it would be 
intelligent if I simply remove exiv2 0.26 from my system?)
> 
> Am Mo., 18. Juli 2022 um 12:59 Uhr schrieb Daniel Bauer 
> <linux at daniel-bauer.com <mailto:linux at daniel-bauer.com>>:
> 
> 
> 
>     Am 18.07.22 um 12:40 schrieb Maik Qualmann:
>      > A test here with the current developer version digiKam-8.0.0 and
>     the current
>      > AppImage digiKam-7.7.0 show no problems with saving the color
>     profile to a new
>      > PNG file.
>      >
>      > Which digiKam version are you using exactly?
>      >
>      > Maik
> 
>     7.1.0
>     which is the one from the opensuse repos for Leap 15.3
> 
>     (I prefer the opensuse rpm's because of their better integration, while
>     the appimages often have (had in my trials) some problems,
>     especially in
>     opening/interacting with other programs from within digikam or with
>     integration to desktop settings :-) )
> 
>      >
>      > Am Montag, 18. Juli 2022, 10:38:09 CEST schrieb Daniel Bauer:
>      >> Am 17.07.22 um 22:52 schrieb Maik Qualmann:
>      >>> Of course, even if color management is turned off, an existing
>     color
>      >>> profile will be saved to the new image. Please describe in more
>     detail in
>      >>> which image format you save and what format the original image had.
>      >>>
>      >>> Tested here with a PSD image using AdobeRGB 1998 and exported
>     as PNG or
>      >>> TIFF.
>      >>>
>      >>> Maik
>      >>
>      >> I did a small test right now:
>      >> - open a PNG that contains AdobeRGB profile
>      >> - save as JPG: profile is saved correct
>      >> - save as PNG: profile is gone, removed
>      >>
>      >> (I didn't notice that the profile remains intact in JPG, because I
>      >> usually work with PNG. Also usually I do not "save as" but
>     overwrite)
>      >>
>      >> Here are the samples:
>      >>
>      >> - https://www.daniel-bauer.com/div/IMG_0157.png
>     <https://www.daniel-bauer.com/div/IMG_0157.png>
>      >> (34MB, Original with embedded AbobeRGB profile)
>      >>
>      >> - https://www.daniel-bauer.com/div/IMG_0157_2.png
>     <https://www.daniel-bauer.com/div/IMG_0157_2.png>
>      >> (36MB, original opened in digikam editor, "save as png", has no
>     profile)
>      >>
>      >> - https://www.daniel-bauer.com/div/IMG_0157.jpg
>     <https://www.daniel-bauer.com/div/IMG_0157.jpg>
>      >> (6MB, original opened in digikam editor, "save as jpg", profile
>     stays
>      >> intact)
>      >>
>      >>> Am Sonntag, 17. Juli 2022, 17:50:39 CEST schrieb Daniel Bauer:
>      >>>> Hello,
>      >>>>
>      >>>> I have a calibrated AdobeRGB1998 screen, my images have embedded
>      >>>> AdobeRGB1998-profile. Now there are some things I don't
>     understand:
>      >>>>
>      >>>> - when I disable color management (which I prefer) the profile is
>      >>>> removed from files when saving. As the profile of my files and
>     of the
>      >>>> screen are the same, color management isn't really necessary
>     for me
>      >>>> (there is no difference whether it's activated or not as there is
>      >>>> nothing to change).
>      >>>>
>      >>>> So I would like to work without color management, but still
>     have the
>      >>>> unchanged profiles embedded in the saved files.
>      >>>>
>      >>>> Can I set this behavior somewhere?
>      >>>>
>      >>>> (I must add the color profile again using a script with
>     ImageMagick, but
>      >>>> as soon as I edit something in digikam the profile is lost
>     again - in
>      >>>> the end I have mix of images with or without embedded profile...)
>      >>>>
>      >>>> -------------
>      >>>> As said I prefer to work without color management in digikam
>     because in
>      >>>> my case it doesn't add anything for me. On the other hand
>     there are some
>      >>>> disadvantages when activating color management, that I don't
>     like - but
>      >>>> maybe there are some setting I haven't found that could better it?
>      >>>>
>      >>>> I set working color space: AdobeRGB1998, Profiles: Monitor
>     profile:
>      >>>> AdobeRGB1998, "use managed view in Previews" is clicked.
>      >>>>
>      >>>> - with activated color management the thumbnails of
>     adobeRGB-images in
>      >>>> album view show bad, as if I would look at them in an srgb
>     screen. The
>      >>>> editor shows the image correct.
>      >>>>
>      >>>> When I deselect "use managed view in Previews" the thumbs are
>     displayed
>      >>>> correct.
>      >>>>
>      >>>> Shouldn't that be at the reverse? Or do I understand something
>     wrong?
>      >>>>
>      >>>> - when I have images with another (wrongly) embedded profile,
>     I want
>      >>>> them to open ignoring the embedded profile and use the
>     Adobe-profile. I
>      >>>> can do that when I set "ask what to do when profile doesn't
>     match".
>      >>>>
>      >>>> In settings I see only the other setting "convert to working
>     space".  I
>      >>>> would like to open it in editor as described above, but
>     without being
>      >>>> asked. Can I somehow?
>      >
>      >
>      >
>      >
> 
>     -- 
>     Daniel Bauer photographer Basel Málaga
>     https://www.patreon.com/danielbauer
>     <https://www.patreon.com/danielbauer>
>     https://www.daniel-bauer.com <https://www.daniel-bauer.com>
> 

-- 
Daniel Bauer photographer Basel Málaga
https://www.patreon.com/danielbauer
https://www.daniel-bauer.com