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fix test failure of cudev

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* follow the implementation of Luv2RGBfloat in imgproc/src/color_lab.cpp
  * loosen threshold in cudaimgproc
This commit is contained in:
Tomoaki Teshima
2018-09-29 23:13:12 +09:00
parent 9faacfbc0d
commit e6ef9221cb
2 changed files with 25 additions and 23 deletions
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modules/cudev/include/opencv2/cudev/functional/detail/color_cvt.hpp
+14 -12
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@@ -1207,27 +1207,29 @@ namespace color_cvt_detail
__device__ typename MakeVec<float, dcn>::type operator ()(const typename MakeVec<float, scn>::type& src) const
{
const float _d = 1.f / (0.950456f + 15 + 1.088754f * 3);
const float _un = 4 * 0.950456f * _d;
const float _vn = 9 * _d;
const float _un = 13 * 4 * 0.950456f * _d;
const float _vn = 13 * 9 * _d;
float L = src.x;
float u = src.y;
float v = src.z;
float Y = (L + 16.f) * (1.f / 116.f);
Y = Y * Y * Y;
float Y1 = (L + 16.f) * (1.f / 116.f);
Y1 = Y1 * Y1 * Y1;
float Y0 = L * (1.f / 903.3f);
float Y = L <= 8.f ? Y0 : Y1;
float d = (1.f / 13.f) / L;
u = u * d + _un;
v = v * d + _vn;
u = (u + _un * L) * 3.f;
v = (v + _vn * L) * 4.f;
float iv = 1.f / v;
float X = 2.25f * u * Y * iv;
float Z = (12 - 3 * u - 20 * v) * Y * 0.25f * iv;
iv = ::fmaxf(-0.25f, ::fminf(0.25f, iv));
float X = 3.f * u * iv;
float Z = (12.f * 13.f * L - u) * iv - 5.f;
float B = 0.055648f * X - 0.204043f * Y + 1.057311f * Z;
float G = -0.969256f * X + 1.875991f * Y + 0.041556f * Z;
float R = 3.240479f * X - 1.537150f * Y - 0.498535f * Z;
float B = (0.055648f * X - 0.204043f + 1.057311f * Z) * Y;
float G = (-0.969256f * X + 1.875991f + 0.041556f * Z) * Y;
float R = (3.240479f * X - 1.537150f - 0.498535f * Z) * Y;
R = ::fminf(::fmaxf(R, 0.f), 1.f);
G = ::fminf(::fmaxf(G, 0.f), 1.f);