Day to night time-lapse batch processing in Linux?

Komin_ctyricettri · October 31, 2016, 11:06pm

Does anybody know what is the best way to batch process ~400 pictures with different exposures? I had to change the exposure accordingly to light conditions. But then I’m struggling to process all those pictures together because first pictures are slightly overexposed compare to last ones. Do you have any idea how to set, either RT or Darktable,

Karl · October 31, 2016, 11:38pm

Darktable 2.0’s auto-exposure mode is supposed to do that. It’s based on Magic Lantern’s deflicker module.

https://www.magiclantern.fm/forum/index.php?topic=17131.0

paperdigits · November 1, 2016, 12:12am

If you want to do some automatic things, open the folder I’m the RT file browser, then select the auto exposure and any other desired parameters from any tools, then Ctrl+b to send them to the batch queue, and then start the batch queue from the batch tab.

Morgan_Hardwood · November 1, 2016, 12:14pm

I don’t think Auto-Levels will give you the kind of results which would be usable in a time-lapse, but there was a project called DeSERt, renamed to Lapse-Studio, which uses RawTherapee for exactly this kind of thing. It’s not actively maintained, but might still work.
https://code.google.com/archive/p/desert-deflicker/
https://code.google.com/archive/p/lapsestudio/
Contact the project’s developer JBildstein (Johannes Bildstein) · GitHub

Tobias · November 1, 2016, 8:13pm

Link to the darktable 2.0’s auto-exposure mode docu:
https://www.darktable.org/usermanual/ch03s04.html.php#exposure

Or try this per script:

github.com

cyberang3l/timelapse-deflicker/blob/master/timelapse-deflicker.pl

#!/usr/bin/perl

# Script for simple and fast photo deflickering using imagemagick library
# Copyright Vangelis Tasoulas (cyberang3l@gmail.com)
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# any later version.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

# Needed packages
use Getopt::Std;

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Komin_ctyricettri · November 2, 2016, 7:26am

Thanks a million. I know about cyberangl3l deflicker and I use it but it wouldn’t work in this case. This deflickering script is great when there’s only a few pictures with different exposure and the rest is pretty constant but the exposure of my pictures changes, let’s say every 50 pics… and therefore auto-levels is actually better tool even though I cannot play with the exposure itself that much but for final results it’s just fine and is much smoother! Thx again.