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.
The nodes are indicated by black disks. The horizontal bars through the disks identify voxels that belong to the sets of voxels associated with the corresponding nodes and the numbers next to the disks are the numbers of voxels in those sets.
