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.
A sequence of images showing how the tracking algorithm reacts when the marker is partially occluded by fake blood. The green outline of the marker indicates successful detection while yellow outline means detection failure and tracking component is used
