Figure 2.

Landmarking process. 3D surface models of a segmented innominate bone and a sacrum. The anatomical landmarks are represented by red dots and the segment landmarks by yellow dots shown on a left innominate bone in lateral view (A). The homologous landmarks on the same bone are represented by the orange dots (B). A complete homologous landmark set on a sacrum including surface landmarks and floating landmarks visualized in ap (C) and lateral (D) view.