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dual demosaic: improved auto threshold detection and fall back to more detailed demosaicer if no flat region was found, #4866

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heckflosse
2018-10-22 14:22:49 +02:00
parent 459f64bac2
commit e2965cc6b4
2 changed files with 9 additions and 2 deletions
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5
rtengine/rt_algo.cc
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@@ -269,8 +269,10 @@ void buildBlendMask(float** luminance, float **blend, int W, int H, float &contr
const int minY = tilesize * minI;
const int minX = tilesize * minJ;
// std::cout << pass << ": minvar : " << minvar << std::endl;
if (minvar <= 1.f || pass == 1) {
// a variance <= 1 means we already found a flat region and can skip second pass
// in second pass we allow a variance of 2
JaggedArray<float> Lum(tilesize, tilesize);
JaggedArray<float> Blend(tilesize, tilesize);
for (int i = 0; i < tilesize; ++i) {
@@ -278,8 +280,7 @@ void buildBlendMask(float** luminance, float **blend, int W, int H, float &contr
Lum[i][j] = luminance[i + minY][j + minX];
}
}
contrastThreshold = std::min(contrastThreshold, calcContrastThreshold(Lum, Blend, tilesize, tilesize) / 100.f);
contrastThreshold = (pass == 0 || minvar <= 2.f) ? calcContrastThreshold(Lum, Blend, tilesize, tilesize) / 100.f : 0.f;
break;
}
}