Bug 330920 - Previews and thumbnails of DNG converted from Canon EOS350D CR2 have incorrect red colors - Update to DNG SDK 1.5
Summary: Previews and thumbnails of DNG converted from Canon EOS350D CR2 have incorrec...
Status: RESOLVED FIXED
Alias: None
Product: digikam
Classification: Applications
Component: Plugin-Bqm-DngConverter (show other bugs)
Version: 4.10.0
Platform: Ubuntu Linux
: NOR normal
Target Milestone: ---
Assignee: Digikam Developers
URL: https://drive.google.com/folderview?i...
Keywords:
Depends on:
Blocks:
 
Reported: 2014-02-08 16:35 UTC by Sander van der Heijden
Modified: 2021-09-12 01:01 UTC (History)
2 users (show)

See Also:
Latest Commit:
Version Fixed In: 7.3.0


Attachments
jpeg preview of the original cr2 image (red ferrari) (1.10 MB, image/png)
2015-06-05 14:08 UTC, Sander van der Heijden
Details
jpeg preview of the converted dng image (orange ferrari) (975.65 KB, image/png)
2015-06-05 14:09 UTC, Sander van der Heijden
Details

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Description Sander van der Heijden 2014-02-08 16:35:14 UTC
After converting CR2 images containing lots of red to DNG in digiKam using DNG convertor both previews and thumbnails are shown with wrong red colors. (see examples and screenshots via URL)

Reproducible: Always

Steps to Reproduce:
1. Convert CR2 with lots of red to DNG using DNG convertor in digiKam
2. 
3.
Actual Results:  
Red color in preview and thumbnail is different from original CR2

Expected Results:  
Red color in preview and thumbnail should be the same as the original CR2
Comment 1 caulier.gilles 2014-02-08 17:11:24 UTC
Same problem than bug #304242 ?

Gilles Caulier
Comment 2 Sander van der Heijden 2014-02-08 17:31:08 UTC
(In reply to comment #1)
> Same problem than bug #304242 ?
> 
> Gilles Caulier

No not exactly, I think camera should be supported (Canon EOS 350d). When opening the DNG in darktable, the thumbnails is still incorrect, but the image is shown with the correct colors.
Comment 3 caulier.gilles 2015-05-18 09:41:34 UTC
Sander,

This file still valid using last kipi-plugins 4.10.0 ?

Gilles Caulier
Comment 4 Sander van der Heijden 2015-06-05 14:08:03 UTC
Created attachment 93021 [details]
jpeg preview of the original cr2 image (red ferrari)
Comment 5 Sander van der Heijden 2015-06-05 14:09:00 UTC
Created attachment 93022 [details]
jpeg preview of the converted dng image (orange ferrari)
Comment 6 Sander van der Heijden 2015-06-05 14:12:15 UTC
Gilles,

I just converted an CR2 image to DNG using kipi-plugins 4.10.0 and the colors in the jpeg preview are still wrong (the red ferrari turns into some kind of orange). I've added 2 screenshots as attachments.
So this bug seems to be not yet resolved.

Sander
Comment 7 caulier.gilles 2016-07-04 12:18:03 UTC
This problem still reproducible using digiKam 5.0.0 ?

Gilles Caulier
Comment 8 caulier.gilles 2016-11-25 16:08:39 UTC
Any feedback with current AppImage bundle for Linux ?

https://drive.google.com/drive/folders/0BzeiVr-byqt5Y0tIRWVWelRJenM

Gilles Caulier
Comment 9 caulier.gilles 2019-12-24 14:15:50 UTC
digiKam 7.0.0-beta1 is out :

https://download.kde.org/unstable/digikam/

This problem still reproducible with this version which include Libraw engine version 0.20.0 ?

Thanks in advance and merry Christmas

Gilles Caulier
Comment 10 caulier.gilles 2020-08-02 14:49:14 UTC
digiKam 7.0.0 stable release is now published:

https://www.digikam.org/news/2020-07-19-7.0.0_release_announcement/

We need a fresh feedback on this file using this version.

Best Regards

Gilles Caulier
Comment 11 caulier.gilles 2021-05-11 03:59:15 UTC
Git commit 2e4f528a1b5c0fbba8916f3a471b081f912cbf4e by Gilles Caulier.
Committed on 11/05/2021 at 03:54.
Pushed by cgilles into branch 'master'.

Internal DNG SDK 1.15 have been updated to digiKam 7.3.0. Link internal libraw with this DNG SDK to improve DNG decoding images.
Related: bug 435085, bug 418645, bug 431689

M  +2    -2    core/libs/rawengine/CMakeLists.txt
M  +3    -1    core/tests/rawengine/CMakeLists.txt

https://invent.kde.org/graphics/digikam/commit/2e4f528a1b5c0fbba8916f3a471b081f912cbf4e
Comment 12 caulier.gilles 2021-05-11 05:30:32 UTC
After upgrading DNG SDK to 1.5 and libraw to snapshot 20210504, EOS350D CR2 can be converted to DNG in digiKam 7.3.0.

Sample CR2 : http://www.rawsamples.ch/raws/canon/350d/RAW_CANON_350D.CR2

Screenshot : https://i.imgur.com/FS7tDQ5.png

I close this file now.

Gilles Caulier