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Applying Auto white balance to large files in file browser leads to wrong results, fixes #4108

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heckflosse
2017-09-26 20:58:50 +02:00
parent e16b9da1c5
commit 3f31a2eed6
1 changed files with 4 additions and 5 deletions
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9
rtengine/rtthumbnail.cc
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@@ -714,9 +714,8 @@ Thumbnail* Thumbnail::loadFromRaw (const Glib::ustring& fname, RawMetaDataLocati
double avg_r = 0;
double avg_g = 0;
double avg_b = 0;
const float eps = 1e-5; //tolerance to avoid dividing by zero
float rn = eps, gn = eps, bn = eps;
unsigned int rn = 0, gn = 0, bn = 0;
for (int i = 32; i < height - 32; i++) {
int start, end;
@@ -831,9 +830,9 @@ Thumbnail* Thumbnail::loadFromRaw (const Glib::ustring& fname, RawMetaDataLocati
}
}
double reds = avg_r / rn * tpp->camwbRed;
double greens = avg_g / gn * tpp->camwbGreen;
double blues = avg_b / bn * tpp->camwbBlue;
double reds = avg_r / std::max(rn, 1u) * tpp->camwbRed;
double greens = avg_g / std::max(gn, 1u) * tpp->camwbGreen;
double blues = avg_b / std::max(bn, 1u) * tpp->camwbBlue;
tpp->redAWBMul = ri->get_rgb_cam (0, 0) * reds + ri->get_rgb_cam (0, 1) * greens + ri->get_rgb_cam (0, 2) * blues;
tpp->greenAWBMul = ri->get_rgb_cam (1, 0) * reds + ri->get_rgb_cam (1, 1) * greens + ri->get_rgb_cam (1, 2) * blues;