Project

General

Profile

Bug #10334

Color picker vs highlights recovery

Added by Istvan Kovacs over 5 years ago. Updated over 3 years ago.

Status:
Fixed
Priority:
Low
Assignee:
Category:
Darkroom
Target version:
Start date:
02/19/2015
Due date:
% Done:

100%

Estimated time:
Affected Version:
git master branch
System:
all
bitness:
64-bit
hardware architecture:
amd64/x86

Description

http://tech.kovacs-telekes.org/files/DSC_4684/DSC_4684.NEF is the raw image, it shows blown highlights on the wig.

Opening the image with all modules cleared except for those shown (those that can't be disabled + exposure and orientation), applied a
-1EV correction. The result is:
http://tech.kovacs-telekes.org/files/DSC_4684/samplers1.jpg
It shows two 'live' colour samplers (area, Lab mean). The blown-out part has a lower L value than the other, darker part. Also note that the bright highlight is sampled as purple, not yellow.

Switching from 'reconstruct color' (samplers1) to 'clip highlights' changes the image dramatically:
http://tech.kovacs-telekes.org/files/DSC_4684/samplers2.jpg
However, the displayed samplers remain the same.
It seems to me that the highlight sampler shows the 'clip highlights' value, no matter what recovery method is selected.
You can see something similar if you open the tone curve tool:
sampling inside the clipped highlight will give you an L value around 76, and inside the darker path around 80.


Related issues

Related to darktable - Bug #10064: highlight reconstruction in LCh: preview and histogram show result from clip highlightsFixed08/17/2014

History

#1 Updated by Roman Lebedev over 5 years ago

  • Related to Bug #10064: highlight reconstruction in LCh: preview and histogram show result from clip highlights added

#2 Updated by Roman Lebedev over 3 years ago

  • System changed from Ubuntu to all
  • Affected Version changed from 1.6.2 to git master branch
  • % Done changed from 0 to 100
  • Assignee set to Roman Lebedev
  • Status changed from New to Fixed

#3 Updated by Roman Lebedev over 3 years ago

  • Target version set to 2.2.0

Also available in: Atom PDF

Go to top