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.
Speed difference between the measurements obtained from different feature tracking settings. The difference is calculated by subtracting the speed from the settings on column from the settings from the row. The speed difference is colorscaled in log as shown in the colorbar at the bottom.
