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fixed a dicide by zero potential problem

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This commit is contained in:
Alexandre Benoit 2012-04-25 13:56:09 +00:00
parent 18fdc6bf1c
commit 9dfb1f77a0
1 changed files with 2 additions and 1 deletions
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modules/contrib/src/basicretinafilter.cpp
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@ -334,7 +334,8 @@ void BasicRetinaFilter::_localLuminanceAdaptation(const float *inputFrame, const
for (register unsigned int IDpixel=0 ; IDpixel<_filterOutput.getNBpixels() ; ++IDpixel, ++inputFramePTR) for (register unsigned int IDpixel=0 ; IDpixel<_filterOutput.getNBpixels() ; ++IDpixel, ++inputFramePTR)
{ {
float X0=*(localLuminancePTR++)*_localLuminanceFactor+_localLuminanceAddon; float X0=*(localLuminancePTR++)*_localLuminanceFactor+_localLuminanceAddon;
*(outputFramePTR++) = (_maxInputValue+X0)**inputFramePTR/(*inputFramePTR +X0); // TODO : the following line can lead to a divide by zero ! A small offset is added, take care if the offset is too large in case of High Dynamic Range images which can use very small values...
*(outputFramePTR++) = (_maxInputValue+X0)**inputFramePTR/(*inputFramePTR +X0+0.00000000001);
//std::cout<<"BasicRetinaFilter::inputFrame[IDpixel]=%f, X0=%f, outputFrame[IDpixel]=%f\n", inputFrame[IDpixel], X0, outputFrame[IDpixel]); //std::cout<<"BasicRetinaFilter::inputFrame[IDpixel]=%f, X0=%f, outputFrame[IDpixel]=%f\n", inputFrame[IDpixel], X0, outputFrame[IDpixel]);
} }
} }