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.
the weight between internal and external energy.
(a) External energy or data dependent term, 
represents the function 
at a particular position 
evaluated in the direction of the tangent vector of the fiber 
. In this example, 
has a larger value than 
. (b) Internal energy or data independent term, punishes length (by the parameter 
) and curvature 
so that 
is preferred over 
.
