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Feature #9272

lens correction enhancement - amount of correction

Added by Jozef Sivek over 6 years ago. Updated over 6 years ago.

Status:
Triaged
Priority:
Low
Assignee:
-
Category:
-
Target version:
-
Start date:
02/18/2013
Due date:
% Done:

20%

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

Description

The common camera models have the option of low, medium and high correction of vignetting. The lens correction module does not have any "amount value" for vignetting and distortion correction. It may be interesting to allow user choose the magnitude of the applied corrections. As an example - the full vignetting correction can be unpleasant, albeit correct, while partial correction can have the right perceptual appearance.


Related issues

Related to darktable - Feature #9273: lens correction enhancement - more understandable interface New 02/18/2013

History

#1 Updated by Pascal de Bruijn over 6 years ago

For artistical purposes we have a seperate module which allows you to apply any kind of vignetting you want (and to whatever degree you'd want).

Considering the above, we're probably not too keen on complicating the UI of the lens correction module any further.

#2 Updated by Jozef Sivek over 6 years ago

You are right, but it is hard to mimic the natural vignetting of an lens. The point was to allow to controll the amount of all the corrections. Maybe this feature is not the one which can be implemented in a short time because it requires rethinking of the UI and probably new widgets.

#3 Updated by Pascal de Bruijn over 6 years ago

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

Right. For the time being I'll leave this feature request open, so we can take another look at a later point in time.

#4 Updated by Torsten Bronger over 6 years ago

I have done a lot of vignetting calibration recently. My observation was that there is no really typical light falloff curve that one could mimic. They differ heavily, and they can do very crazy things. So I think the following approach is okay:

  1. Correct lens vignetting automatically and fully.
  2. Add manual vignetting effect.

#5 Updated by Torsten Bronger over 6 years ago

#6 Updated by Roman Lebedev over 4 years ago

  • Related to Feature #9273: lens correction enhancement - more understandable interface added

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