Profile filters split a profile into large-scale and short-scale components.
A profile S-filter removes short-scale components, a profile L-filter removes large-scale components.
Nesting index Nic (previously cut-off λc) defines the transition from the roughness to waviness.
Mean line is generated with a phase-correct filter by forming a weighted mean value for each point of the profile.
Weighting function specifies for each profile point with which weighting factor the adjacent profile points are entered in the mean value formation (Gaussian bell curve).
R-profile (roughness profile) is the deviation of the primary profile from the mean line of the profile S-filter. When displaying the roughness profile, the mean line is the datum line.