On the Face it seems to work

A new script for gimp is at the gimp registry and it uses:

sudo apt-get install libcv-dev

It is interesting to study and the process description is very informative. It works on samples that I got from google faces easily, even in mono and at a small scale. I will study the algorithm as it obviously has many uses and can be modified to see other types of patterns in data sets.

Here is a reference to libcv ( computer vision )