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.
Image selection for face identification task. Views of 0, ±45°, and ±90°, with three images in each view (expression), were used as train images (specified with green frame). Views of ±22.5° and ±67.5° were selected as test images (specified with yellow frame) and some other images were not used in experiments (gray-frame images).
