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Improvmant to Exposure - Shadows Highlights

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This commit is contained in:
Desmis
2019-03-09 12:53:25 +01:00
parent 43bf1f6cd9
commit 4397842fea
6 changed files with 41 additions and 23 deletions
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16
rtengine/curves.cc
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@@ -1059,13 +1059,11 @@ void CurveFactory::complexCurvelocal(double ecomp, double black, double hlcompr,
int skip)
{
// the curve shapes are defined in sRGB gamma, but the output curves will operate on linear floating point data,
// hence we do both forward and inverse gamma conversions here.
const float gamma_ = Color::sRGBGammaCurve;
const float start = expf(gamma_ * logf(-0.055f / ((1.0f / gamma_ - 1.0f) * 1.055f)));
const float slope = 1.055f * powf(start, 1.0f / gamma_ - 1.f) - 0.055f / start;
const float mul = 1.055f;
const float add = 0.055f;
const float gamma_ = 2.22; //BT 709
const float start = expf(gamma_ * logf(-0.0954f / ((1.0f / gamma_ - 1.0f) * 1.0954f)));
const float slope = 1.0954f * powf(start, 1.0f / gamma_ - 1.f) - 0.0954f / start;
const float mul = 1.0954f;
const float add = 0.0954f;
float maxran = 65536.f; //65536
// ecomp /= 100.;
@@ -1255,7 +1253,7 @@ void CurveFactory::complexCurvelocal(double ecomp, double black, double hlcompr,
shCurve[0] = CLIPD(val2) / val;
// gamma correction
val = Color::gammatab_srgb[0] / maxran;
val = Color::gammatab_bt709[0] / maxran;
// store result in a temporary array
dcurve[0] = CLIPD(val);
@@ -1266,7 +1264,7 @@ void CurveFactory::complexCurvelocal(double ecomp, double black, double hlcompr,
shCurve[i] = val2 / val;
// gamma correction
val = Color::gammatab_srgb[i] / maxran;
val = Color::gammatab_bt709[i] / maxran;
// store result in a temporary array
dcurve[i] = val;
}