Originally Posted by OakCliff
This might be where the images originally came from. It includes average male and female faces, with links on the left hand side, but there is no discussion of the methodology used to do it.
from the comments section:
I used this site: http://www.faceresearch.org/demos/average
I used no one I thought was under 20 and no one I thought was over 50. I used any internet source I could to get about 15-20 pictures each composite. The hardest thing is finding that many pictures of good frontal shots. Most people take pictures at an angle.
It is also not always easy to find pictures of every nationality. At times I would use Google Image and type in the 10 most common last names for a nationality. For Latin America, where names are shared, I would use the most common last names for that country and put the country name in the search. I would try to verify that the person is at least in that country or from it (not easy). That was especially tricky with the UK (English, Welsh, etc) and Irish.
Strangely for some nationalities it was easier to find men than women or vice versa. For example, very easy to find pictures of Italian men, but not women. It is very easy to find pictures of French women, but not men, etc.
Anyway, for every composite I think I viewed at least a couple of thousand photos.