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.
Factor graph used in Model 1 and 2. Variables are drawn as circles and factors (interactions among variables) as boxes. Factors enforcing geometric constraints are drawn in red and factors incorporating scanline edge information are drawn in green.
