Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Color images of an emotional face were taken from the ATR Facial Expression Image Database (DB99) (ATR-Promotions, Kyoto, Japan, http://www.atr-p.com/face-db.html).
