What are some methods to analyze image brightness using Python?

Question

I\'d like some advice on performing a simple image analysis in python. I need to calculate a value for the \"brightness\" of an image. I know PIL is the goto library for doi

Answer 1

Given that you're just looking for an average across the whole image, and not per-pixel brightness values, averaging PIL's histogram and applying the brightness function to the output seems like the best approach for that library.

If using ImageMagick (with the PythonMagick bindings), I would suggest using the identify command with the "verbose" option set. This will provide you with a mean value for each channel, saving you the need to sum and average a histogram — you can just multiply each channel directly.