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.
A partial image layout for a 450 × 450 pixels image that is partitioned into four blocks. This figure shows an example of how a 450 × 450 pixels image is partitioned into four 300 × 300 subimages. The four numbered squares are the centers of the subimages. Each subimage has a 50% overlap with neighboring subimage.
