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 proposed hierarchical activity recognition framework. The framework essentially organizes the predefined activities of interest into a hierarchical tree that indicates the relationship among different activities. (a) An example of a hierarchical activity recognizer; (b) Abstract form of the corresponding hierarchical structure.
