Note: The user "Titaniumtown" is now the primary maintainer of this repository; if you need to contact the owner contact "Titaniumtown".

HDR+ Implementation

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

To compile, follow these steps:

1. Install libraw¹, libpng, and libjpeg.²
2. Download and compile llvm 3.9
3. Download the "2017-05-03" source of Halide from https://github.com/halide/Halide_old_history/releases
4. Compile Halide according to the README.md file included with the source file zip of halide.
5. Go the folder you have the hdr-plus code in.
6. Set HALIDE_ROOT_DIR in CMakeLists.txt to the Halide directory path.
7. From the project root directory, run the following commands:

mkdir build
cd build
cmake ..
make

Height and Width related errors:

If you get an error relating to the width and height of the input photos³ change the width and height in src/HDRPlus.cpp to the dimensions of your input files.

Example of an error created:

Input image '/Users/simon/Desktop/Photography/HDR-PLUS-TEST/1//3.dng' has width 3474, but must must have width of 5796

Compiled Binary Usage:

./hdrplus [-c comp -g gain] 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.

Footnotes:

¹ If you are on macOS the included dcraw binary will not work so I included the macos version in the same directory. If you are on macOS change the following "../tools/dcraw" to "../tools/dcraw_macos" in the files below before compiling:

• batch_dcraw.py
• finish.cpp (2 instances)
• HDRPlus.cpp
• halide_load_raw.h

² Also to install libraw, libpng, and libjpeg on macOS run brew install libraw* libpng* libjpeg*

³ I am looking into the program automaticly finding the width and height of the input photos. If you have any pointers please contact me.