88MMMMMM MM MMMMMMM MMMMMMMMFMMML3D X L30 MMM X 330 • LLENE 5.3LMpMMmbMM M0L4Be sure to print checkerboard targets with laser printers, rather thaninkjet printers, because the reflectivity of checkerboards printed withinkjet printers can cause problems. Laminating checkerboards can alsocause problems due to reflectivity. If you do laminate checkerboards, besure to use a matte laminate and test the targets before use.LphMMMLSpheres are useful because they can be placed at any angle to thescanner. Because several scan points are used to identify a sphere, theycan also be placed farther away from the scanner.SuperSpheres are larger spheres that can also be placed farther from thescanner.NMMMMMM LMmmMM RMfMMMMMM ObMMMMLNatural common reference objects are geometric objects, such as points,planes, and lines, that occur on features in the scan area. A feature suchas a wall, for example, can be identified as the same plane in two or morescans and used as a common reference object during registration.NMMMMMM LMmmMM RMfMMMMMM ObMMMM (MMMMM MM LMMM L)Slide 98
