Free Ubuntu hicolor icon generator, written in Python with OpenCV libraries.
The script seems to work fine with Python 2.7.6. You can run this command to install it, although it should come with a standard Ubuntu 14.04 installation: sudo apt-get install python2.7
Since the script is written with OpenCV, you will need to install that. This apt command should install all necessary libraries and bindings for Python:
sudo apt-get install python-opencv
This is the command format used by the script:
python generate.py <path-to-source-icon-image-file>
You may have to execute this with root privileges, which will result in
sudo python generate.py <path-to-source-icon-image-file>
If your source icon image file path contains spaces, be sure to put the path in quotes.