5 swiss francs
 
approximate scan time 24h

resolution 170dpi

(# of nodes > 47000)

the stripes that are apparent
in the original stem from a
slight excentricity of the
x-axis spindle
this generates a sinusoidal
pattern with an amplitude of
less than 0.01mm over the
entire coin

the corrected version is
obtained by adding a
sinusoidal correction with
an adjusted amplitude,
period and phase to the
measured data
original
5sfr
corrected
5sfr_corrected