liz/rawTherapee
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The "dual-spot" exponents calculation feature now honors the master (green) exponent set by the user, and adjusts red and blue based on the ratios between the new, "guessed" exponents.

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This way, if the user has chosen a different master exponent than the default, using the feature just alters the color characteristic of the conversion, while keeping the same contrast level.
This commit is contained in:
rom9
2019-06-23 22:21:24 +02:00
parent 8c6458daff
commit 2fde6e562a
2 changed files with 8 additions and 7 deletions
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4
rtengine/filmnegativeproc.cc
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@@ -151,9 +151,9 @@ bool rtengine::RawImageSource::getFilmNegativeExponents(Coord2D spotA, Coord2D s
// compared to the ratio in the reference channel (green)
for (int ch = 0; ch < 3; ++ch) {
if (ch == 1) {
newExps[ch] = 2.f; // Green is the reference channel
newExps[ch] = 1.f; // Green is the reference channel
} else {
newExps[ch] = CLAMP(2.f * logBase(clearVals[ch] / denseVals[ch], denseGreenRatio), 0.3f, 6.f);
newExps[ch] = CLAMP(logBase(clearVals[ch] / denseVals[ch], denseGreenRatio), 0.3f, 6.f);
}
}