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.
On the left are single frames extracted from a video sequence, while the panels on the right display the corresponding motion silhouettes. Pixels that have been displaced (i.e., places in the video frame where motion has occurred) are shown in white; pixels that have not been displaced are shown in black.
