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 Centroid trajectory of the segmented region according to the proposed method (bold line), and the trajectory of the center position obtained using the template-matching method (dashed line). b The tracking error (bold line) and Jaccard index (dashed line) according to the proposed method
