User manual

16 FastSCAN
You can control the amount of smoothing using the Profile Smoothing option in the
Scanner Limits Control dialog box (High, Medium, Low (default), or Off—see Fig-
ure 10) (Note: Smoothing cannot be turned off when using the Scorpion
TM
). Chang-
ing this value affects newly captured profiles—it cannot change data that you have
already collected. You may need to experiment to find the optimal value before you
begin scanning. Figure 11 shows how smoothing can affect a profile.
(a) A profile with high smoothing.
(b) A profile with low smoothing.
Figure 11: Examples of profile smoothing applied to a single profile when scanning
a corrugated surface. The dots are the original scanned points and the black line is
the resulting profile. Note that high smoothing drops three points at the end of the
profile, while low smoothing only drops one.
The generation of Basic and RBF Surfaces (Section 4) applies a different type of smooth-
ing to profile smoothing. Unlike the profile filter, you can adjust this without having
to rescan your object.
3.4 Undoing Scans
This Wand function is switched ON by default. By clicking on Set-
tings/Wand you can choose to switch off/on Double-click Undoes
Sweep and/or Triple-click Undoes Scan. Selecting this option allows
you to double or triple click to the Preview position while scanning, to
delete the previous sweep or entire scan respectively. Use with caution!
Clicking on the Undo Sweep/Redo Sweep icons (above) enables you to
remove single sweeps (in reverse order to which they were created) and
place them back again if desired (in the same order).