Image processing to auto adjust colors in python ?

  
Hi,

I'm processing thumbnails with python but one thing I need to do is to
auto-adjust an image for the "best" colors. I am using ffmpeg to get
thumbs three seconds into a video, sometimes  the image is too dark.
Normally I'd go into something like the windows program Irfan View and
do "Auto Adjust Colors", but I need a command-line solution to
processes hundreds of images in a loop. I'm using Ubuntu and Python.
Is there a way in PIL I could do this?

thanks,

Lee G. 

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