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.
Schematic diagram of the three matching cases. (a) Case 1: object not detected in the current frame. (b) Case 2: object detected in the current frame, but not in the previous frame. (c) Case 3: object is detected in both the previous frame and the current frame.
