Figure 1

Scientific rotoscoping [20]. The experimental setup for synchronous high-speed x-ray video recording (A) is virtually re-created within animation software (B). X-ray videos are loaded into the backplane as image sequence planes. A 3D bone model is positioned to match the x-ray shadow in both the lateral (C) and dorso-ventral (D) backplane for the entire image sequence. Six DOF (degrees of freedom, i.e., translations and rotations about anatomically defined coordinate systems - see methods) are exported for all constituent skeletal elements of the shoulder girdle.