Registration is the process of bringing geometric entities into proper alignment. It is necessary when a component or parts of a component have to be scanned at different times, or have to match coordinate systems of other scanned data. It is also needed when an existing model is to be registered with the scanned data. Different mechanisms are provided for registration

• 3-2-1 Registration
• Point set-to-Point set Registration
• Mixed Mode Registration
• Stepwise Spatial/Translational Registration
• Direct Registration