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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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10
rtengine/color.h
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@@ -164,11 +164,13 @@ public:
static LUTf gammatab_srgb;
static LUTf gammatab_srgb327;
static LUTf gammatab_srgb1;
static LUTf gammatab_bt709;
static LUTf denoiseGammaTab;
static LUTf denoiseIGammaTab;
static LUTf igammatab_24_17;
static LUTf igammatab_bt709;
static LUTf gammatab_24_17a;
static LUTf gammatab_13_2;
static LUTf igammatab_13_2;
@@ -1159,23 +1161,25 @@ public:
}
/*
/**
* @brief Get the gamma value for Gamma=2.2 Slope=4.5
* @param x red, green or blue channel's value [0 ; 1]
* @return the gamma modified's value [0 ; 1]
*
**/
static inline double gamma709 (double x) {
return x <= 0.0176 ? x*4.5 : 1.0954*exp(log(x)/2.2)-0.0954;
}
/**
* @brief Get the inverse gamma value for Gamma=2.2 Slope=4.5
* @param x red, green or blue channel's value [0 ; 1]
* @return the inverse gamma modified's value [0 ; 1]
*
**/
static inline double igamma709 (double x) {
return x <= 0.0795 ? x/4.5 : exp(log((x+0.0954)/1.0954)*2.2);
}
*/