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Fattal: fixed off-by-one error in rescaling the luminance

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Fixes #4200
This commit is contained in:
Alberto Griggio
2017-11-28 08:57:45 +01:00
parent edbe4f3f14
commit 8e43df5abb
1 changed files with 7 additions and 4 deletions
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11
rtengine/tmo_fattal02.cc
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@@ -1253,15 +1253,18 @@ void ImProcFunctions::ToneMapFattal02 (Imagefloat *rgb)
rescale_nearest (Yr, L, multiThread); rescale_nearest (Yr, L, multiThread);
tmo_fattal02 (w2, h2, L, L, alpha, beta, noise, detail_level, multiThread); tmo_fattal02 (w2, h2, L, L, alpha, beta, noise, detail_level, multiThread);
const float hr = float(h2) / float(h);
const float wr = float(w2) / float(w);
#ifdef _OPENMP #ifdef _OPENMP
#pragma omp parallel for if(multiThread) #pragma omp parallel for if(multiThread)
#endif #endif
for (int y = 0; y < h; y++) { for (int y = 0; y < h; y++) {
int yy = y * h2 / h; int yy = y * hr + 1;
for (int x = 0; x < w; x++) { for (int x = 0; x < w; x++) {
int xx = x * w2 / w; int xx = x * wr + 1;
float Y = Yr (x, y); float Y = Yr (x, y);
float l = std::max (L (xx, yy), epsilon) * (65535.f / Y); float l = std::max (L (xx, yy), epsilon) * (65535.f / Y);
rgb->r (y, x) = std::max (rgb->r (y, x), 0.f) * l; rgb->r (y, x) = std::max (rgb->r (y, x), 0.f) * l;