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Feature #11404

Give user possibility to change white balance relatively

Added by Mariusz Jaskółka over 1 year ago. Updated 3 months ago.

Status:
Duplicate
Priority:
Low
Assignee:
-
Category:
-
Target version:
Start date:
12/29/2016
Due date:
% Done:

0%

Affected Version:
2.2.0
System:
Ubuntu
bitness:
64-bit
hardware architecture:
amd64/x86

Description

When I change e.g. temperature in white balance section, then save it as a new style and apply it to whole collection then every photo has exactly the same temperature set. It is not very practical solution.

My expectation is:
I change temperature from 4500K to 5000K (+500K). When I save this change as a style and set this style to the image that oryginally had 4700K (from RAW information) I suppose it to have 5200K as a result (+500K as well). This behavior could be optional (relative/absolute change option).


Related issues

Duplicates darktable - Feature #10880: Please add a local white balance feature New 01/17/2016

History

#1 Updated by Roman Lebedev over 1 year ago

  • Status changed from New to Incomplete
  • % Done changed from 0 to 20

Do note that we store white balance as multipliers.
The displayed Kelvin temperature is not representable (as in, across different software), and is only useful for information.

That being said, i i'm not entirely convinced that this could/should be done.

#2 Updated by Mariusz Jaskółka over 1 year ago

From user point of view:
Maybe this is my opinion but i think it is pointless to set the same white balance to all photos in collection. On the other hand it would be helpfull to make all photos warmer/colder approximetly by the same relative value (na matter which units is being used).
My use-case from today: all collection from the party in room with old-school bulb & all the photos was "too yellow" as my camera was working in auto-white-balance mode. I had to move "temperature" slider left about 500K manually for every single photo.

From programmer point of view:
I understand that temperature value could be calculated by darktable with it's own algorythm and is not compatible with other software. But is it really a problem? Moving slider left/right by the same value from what was read/calculated from RAW manually is possible so doing it automatically with preset/style is technically possible as well. How? One of the solutions could be to switch "white balance" filter between absolute/relative mode (similar to exposure filter's modes). But you are programmers/architects here :) ( I am too but I didn't read the source code ;) )

#3 Updated by Roman Lebedev about 1 year ago

  • Duplicates Feature #10880: Please add a local white balance feature added

#4 Updated by Roman Lebedev about 1 year ago

  • Status changed from Incomplete to Duplicate
  • % Done changed from 20 to 0

#5 Updated by Roman Lebedev about 1 year ago

  • Target version set to 2.4.0

#6 Updated by Mariusz Jaskółka 3 months ago

Roman Lebedev Please note that this is not a duplicate with #10880 – {local/masked white balance} vs. {relative white balance across multiple photos, stored in style}

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