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Bug #11898

"create HDR" leads to magenta-cast image

Added by Jarrad Whitaker 10 months ago. Updated about 2 months ago.

Status:
New
Priority:
Low
Assignee:
-
Category:
-
Target version:
-
Start date:
01/01/2018
Due date:
% Done:

0%

Affected Version:
2.4.0
System:
Ubuntu
bitness:
64-bit
hardware architecture:
amd64/x86

Description

Creating an HDR from three DNGs leads to an incredibly purple/magenta image. Originals and resulting are uploaded here:

https://drive.google.com/drive/folders/17S0fjh1rcbbetPkJiklyYyqDWcxCRnos?usp=sharing

A JPG export of the resulting HDR is attached.

Possibly a dupe of https://redmine.darktable.org/issues/11620, opening a new issue because I'm merging three DNGs instead of trying to make an HDR from a single image.

20180101_0067-hdr_01.jpg - output export (639 KB) Jarrad Whitaker, 01/01/2018 06:01 AM

History

#1 Updated by Steven Zimmerman 9 months ago

This bug appears to relate to bug #11620

#2 Updated by Sebastian Bachmann about 2 months ago

I can reproduce this problem with all images made with a Canon 5D mk II but not with NEF images from a Nikon D200 or CR2 from a Canon 350D.
The 5DmkII has 14bit RAW, while both other cameras have 12bit RAW. Is it possible that the HDR does not work with 14bit images?

I tried to convert the 5D CR2 images into TIFF or EXR but with both the HDR function does not work.

#3 Updated by Sebastian Bachmann about 2 months ago

A short update: I used some images of a Canon 60D, which should also have 14bit RAW and those images does not look purple but have some red-ish tone... But I do not have actual bracketed HDR shots available from this camera and I do not own this camera anymore, so I can not test it with real shots.

But I also have a Canon M3, which should have 14bit RAW as well - in this case the HDR works fine, I just tested that.
So it looks like the only RAW files which does not work are those of my 5D MKii.

Here is a series of +-2EX images: https://files.reox.at/darktable_hdr plus the resulting DNG.

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