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

Original git-repositories:

• https://github.com/timothybrooks/hdr-plus/
• https://github.com/OPNA2608/hdr-plus

1. Use the ./install.sh script
2. Download the example images with ./download_sample_images.sh
3. Run the script ./run.sh

There are three zip files with examples of the HDR+ algorithm at: http://www.gardling.com/hdr_plus

Usage: ./hdrplus [-c comp -g gain (optional)] dir_path out_img raw_img1 raw_img2 [...]
example: ./hdrplus $HOME/images/hdr_samples/RAWs temp.jpg burst3_5.CR2 burst3_5.CR2

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.