Original Document on the subject (by Timothy Brooks): https://timothybrooks.com/tech/hdr-plus

Currently maintained by Simon Gardling

Build the package directly:

nix build
./result/bin/hdrplus

Or enter a development shell:

nix develop
mkdir build && cd build
cmake ..
make -j$(nproc)

You can download the examples from this torrent. Make sure to seed!

Usage: ./hdrplus [-c comp -g gain (optional)] dir_path out_img raw_img1 raw_img2 [...]

The -c and -g flags change the amount of dynamic range compression and gain respectively. Although they are optional because they both have default values.