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Avoid division by zero in RGB_denoise

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Fix for #4214
This commit is contained in:
Alberto Griggio
2017-12-09 00:35:09 +01:00
parent d258216d41
commit d7fb8c9136
1 changed files with 2 additions and 1 deletions
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rtengine/FTblockDN.cc
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@@ -658,7 +658,8 @@ SSEFUNCTION void ImProcFunctions::RGB_denoise(int kall, Imagefloat * src, Imagef
}
const float gain = pow(2.0f, float(expcomp));
float noisevar_Ldetail = SQR(static_cast<float>(SQR(100. - dnparams.Ldetail) + 50.*(100. - dnparams.Ldetail)) * TS * 0.5f);
float params_Ldetail = min(float(dnparams.Ldetail), 99.9f); // max out to avoid div by zero when using noisevar_Ldetail as divisor
float noisevar_Ldetail = SQR(static_cast<float>(SQR(100. - params_Ldetail) + 50.*(100. - params_Ldetail)) * TS * 0.5f);
array2D<float> tilemask_in(TS, TS);
array2D<float> tilemask_out(TS, TS);