Gist feature 

Hi, 
i propose to add GIST descriptor [0] described in this paper :

Modeling the shape of the scene: a holistic representation of the spatial envelope
Aude Oliva, Antonio Torralba
International Journal of Computer Vision, Vol. 42(3): 145-175, 2001. PDF

C implementation comes from INRIA Lear Team [1] in GPL LIcence

and python code in mainly provided by the pyleargist package [2]

0. http://people.csail.mit.edu/torralba/code/spatialenvelope/
1. http://lear.inrialpes.fr/software
2. http://pypi.python.org/pypi/pyleargist/1.0.1

Let me know what you think about that 

Sébastien Campion