https://photographylife.com/iso-invariance-explained
You might want to look at this article regarding Invariance. Many/most
recent cameras have invariant sensors that allow the subject ISO to be
modified in post production. base-curve/fusion in dt makes use of
invariance in a similar, but simplified, manner to HDR but using just a
single image. You may find this interesting as a means of DR extension.
David
On 8/23/19 5:13 PM, Niranjan Rao wrote:
Greetings,
On darktable version 2.6.2, Ubuntu 18.04.
I know how to generate HDR images in darktable, basically select
images from lighttable and under selected images menu, click on create
HDR. This works.
However it's getting tedious for doing many images and getting error
prone. So, I'm exploring batch options. Anyone has any ideas? I'm
comfortable writing shell scripts or Java code if needed. I have not
explored darkable/Lua combination yet.
For batch mode I see I have to do following
Figure out images which can be grouped together for HDR. I don't know
if cameras write any special tag in raw file that might help. If not,
only option seems to be check tags like time stamp, focal length and
such that will remain same. For my purposes, these fields most likely
will do the job and get me the names of the file unless I find a
better way to identify the images.
Once I have managed to find the group, next task is convince
darktable/lua to create HDR from the selected images. This is where I
am stuck. Quick search revealed
https://github.com/darktable-org/lua-scripts which has few promising
leads e.g. enfuse. I'm not clear how to use it.
Looking for any pointers/help.
Thanks in advance,
Niranjan
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