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used BT601 instead of BT709 in RGB2Lum

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HuYingzhuo(hugo/hyzboy) 2023-11-01 19:13:54 +08:00
parent b5c66fe2cd
commit 1141f37cc4
1 changed files with 13 additions and 8 deletions
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15
inc/hgl/color/Lum.h
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@ -5,19 +5,24 @@
namespace hgl namespace hgl
{ {
template<typename T> constexpr T RGB2Lum(const T &r, const T &g, const T &b) template<typename T> constexpr T RGB2Lum(const T &r,const T &g,const T &b)
{ {
return 0.2126f*r+0.7152f*g+0.0722f*b; return T(0.299f*r+0.587f*g+0.114f*b);
} }
template<> constexpr uint8 RGB2Lum(const uint8 &r, const uint8 &g, const uint8 &b) template<> constexpr uint8 RGB2Lum(const uint8 &r,const uint8 &g,const uint8 &b)
{ {
return (r*54+g*183+b*19)>>8; return uint8((r*77+g*151+b*28)>>8);
}
template<typename T> constexpr T RGB2LumBT709(const T &r, const T &g, const T &b)
{
return T(0.2126f*r+0.7152f*g+0.0722f*b);
} }
template<typename T> constexpr T RGB2LumBT2020(const T &r,const T &g,const T &b) template<typename T> constexpr T RGB2LumBT2020(const T &r,const T &g,const T &b)
{ {
return 0.2627f*r+0.6780f*g+0.0593f*b; return T(0.2627f*r+0.6780f*g+0.0593f*b);
} }
}//namespace hgl }//namespace hgl
#endif//HGL_COLOR_LUM_INCLUDE #endif//HGL_COLOR_LUM_INCLUDE