Warning!

This repository is currently not maintained and after knowing much better the OpenEXR format, there is a lot of missing features that shall have been supported:

• No support for displayWindow
• No support for chromaticities

If you want to use the proper tool, I recommend using OpenImageIO tools: https://openimageio.readthedocs.io/en/v2.2.15.1/oiiotool.html

So, take this repo with a grain of salt, an example on how to read OpenEXR images using the OpenEXR library, not as the state of the art.

OpenEXR converter

These tools are simple utilities to convert images files from OpenEXR to PNG 8bit sRGB files and TIFF to OpenEXR.

Checking out the repository

git clone git@github.com:yama-chan/openexr-converter.git
git submodule update --init --recursive

Compilation

Dependencies

You need to install OpenEXR to compile the tool:

• libopenexr
• libtiff

Ubuntu 16.04 LTS

sudo apt install libopenexr-dev libtiff5-dev

Arch Linux

sudo pacman -S openexr libtiff

Compilation

In order to compile in a folder build the tool, do:

mkdir build
cd build
cmake ..
make

After compilation,

• exr-png will be created in src/exr-png folder.
• tiff-exr will be created in src/tiff-exr folder.

To install, do:

sudo make install

Usage

OpenEXR to PNG

exr-png  [-g <real>] [-a] -o <string> -i <string> [--] [--version]
		 [-h]

Where:

   -g <real>,  --gamma <real>
     Set the gamma correction (default sRGB)

   -a,  --ignore-alpha
     Ignore alpha channel

   -o <string>,  --output <string>
     (required)  Set file to save to

   -i <string>,  --input <string>
     (required)  Set file to convert

   --,  --ignore_rest
     Ignores the rest of the labeled arguments following this flag.

   --version
     Displays version information and exits.

   -h,  --help
     Displays usage information and exits.

TIFF to OpenEXR

tiff-exr <input_tiff_file> <output_exr_file>