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shadows/highlights: add a bit more contrast in the shadows

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This commit is contained in:
Alberto Griggio
2018-04-24 14:59:46 +02:00
parent c456741431
commit 6bea422836
1 changed files with 15 additions and 1 deletions
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16
rtengine/ipshadowshighlights.cc
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@@ -68,11 +68,25 @@ void ImProcFunctions::shadowsHighlights(LabImage *lab)
const float gamma = hl ? base : 1.f / base; const float gamma = hl ? base : 1.f / base;
LUTf f(32768); LUTf f(32768);
const float contrast = std::pow(2.f, float(amount)/100.f);
DiagonalCurve sh_contrast({
DCT_NURBS,
0, 0,
0.125, std::pow(0.125 / 0.25, contrast) * 0.25,
0.25, 0.25,
0.375, std::pow(0.375 / 0.25, contrast) * 0.25,
1, 1
});
#ifdef _OPENMP #ifdef _OPENMP
#pragma omp parallel for if (multiThread) #pragma omp parallel for if (multiThread)
#endif #endif
for (int l = 0; l < 32768; ++l) { for (int l = 0; l < 32768; ++l) {
f[l] = std::pow(l / 32768.f, gamma) * 32768.f; auto base = std::pow(l / 32768.f, gamma);
if (!hl) {
// get a bit more contrast in the shadows
base = sh_contrast.getVal(base);
}
f[l] = base * 32768.f;
} }
#ifdef _OPENMP #ifdef _OPENMP