The denoiser submitted at Raytracing Camp 8.
git clone --recursive https://github.com/ykozw/rtcamp8_denoiser.git
cd rtcamp8_denoiser
mkdir build
cd build
cmake ..
cmake --build . --config Release
cmake --install .
cd ../bin
denoiser.exe ../images/color.hdr ../images/albedo.hdr ../images/normal.hdr denoised.hdr