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.
Comparison of correctly tracked and mistracked points in traditional HARP method. (a) The y components of the 2D displacements of a mistracked and a correctly tracked points among 12 time frames, and (b) the L1-norm of their second derivatives.
