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.
Spatial decomposition through the Gaussian pyramid of five levels with specific details on the pixel resolution. Since the dimensions of the square detected face area are not integer exponents of two, the size is rounded to the nearest integer.
