Figure 5. Sparse histograms of “talking on the phone” and “writing on the white board” in the CAD-60 dataset.
The sparsity degrees are 
and 
respectively. Note that the sum of the histograms is 
.
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.