Search for face pictures
A new feature has appeared in Google Image Search: filtering image search results by the condition that a person has a face on the image . This feature is not yet reflected in the interface and works when adding the get parameter & imgtype = face to the address bar .
via googlesystem.blogspot.com/2007/05/restrict-google-image-results-to-faces.html
via googlesystem.blogspot.com/2007/05/restrict-google-image-results-to-faces.html