User manual

32 FastSCAN
(a) 6 mm Decimation (b) 9 mm Decimation
Figure 22: The same object at different decimation values. The 6 mm version (a) has
1378 triangles, while the 9 mm version (b) has only 704 triangles.
(Scorpion models only, refer Section 10.3).
• Perform a User Calibration to ensure the optics are correctly aligned
(see Section 10).
5.2.3 Limit Objects to:
You may find that your surface contains parts of background objects (such as the
scanning table) that you did not mean to scan—the camera can pick-up partial pro-
files on objects behind the target object. You can use the Limit Objects to control to
remove these extra bits of surface, but only if they are disconnected from and smaller
than all the pieces of the main object.
Check the Limit Objects to box in the Generate Surface dialog (Figure 19) and en-
ter the number of objects N that you wish to be preserved. The export process will
remove all the smaller objects, leaving only the N largest.
If this method fails, you can:
• delete parts from the Sweeps (see Section 4.4.4)
• edit the Basic Surface afterward using a separate application
• rescan after covering background objects in a black cloth (or similar arrangement)
in order to suppress the laser return from them.
5.2.4 Surface Simplification:
Check the Surface Simplification box to reduce the complexity of the Basic Surface—
this generates fewer triangles for roughly the same accuracy.