| NICP | Non-Rigid Optimal Step Iterative Closest Point Algorithm |
| ICP | Iterative Closest Point Algorithm |
| ex | Exocanthion |
| en | Endocantion |
| n | Nasion |
| prn | Pronasale |
| sn | Subnasale |
| ch | Chelion |
| ls | Labiale Superius |
| li | Labiale Inferius |
| gn | Gnathion |
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