Luminosity (aka Brightly aka Funset)

Install dependencies

Install Pillow, the friendly PIL (Python Imaging Library) fork.

pip install -r requirements.txt

Note that Pillow depends other external libraries as well. For more information on installing Pillow, check out their docs here.

See which of your pictures is the brightest

To run on the example fixture png files: python luminosity.py ./fixtures/*.png

"Brightness" is based on relative luminance, as described here.