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Ansel 0.0
A darktable fork - bloat + design vision
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Ansel 0.0
A darktable fork - bloat + design vision
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Collaboration diagram for dt_iop_filmic_params_t:Data Fields | |
| float | grey_point_source |
| float | black_point_source |
| float | white_point_source |
| float | security_factor |
| float | grey_point_target |
| float | black_point_target |
| float | white_point_target |
| float | output_power |
| float | latitude_stops |
| float | contrast |
| float | saturation |
| float | global_saturation |
| float | balance |
| int | interpolator |
| int | preserve_color |
DOCUMENTATION
This code ports :
The ACES log implementation is taken from the profile_gamma.c IOP where it works in camera RGB space. Here, it works on an arbitrary RGB space. ProPhotoRGB has been chosen for its wide gamut coverage and for conveniency because it's already in darktable's libs. Any other RGB working space could work. This chouice could (should) also be exposed to the user.
The filmic curves are tonecurves intended to simulate the luminance transfer function of film with "S" curves. These could be reproduced in the tonecurve.c IOP, however what we offer here is a parametric interface useful to remap accurately and promptly the middle grey to any arbitrary value chosen accordingly to the destination space.
The combined use of both define a modern way to deal with large dynamic range photographs by remapping the values with a comprehensive interface avoiding many of the back and forth adjustments darktable is prone to enforce.
1.9.8