Zusammenfassung
3D models of the skin surface of patients are
created by ultra-fast holography and automatic scan
matching of synchronously recorded holograms. By
recording with a pulsed laser and continuous-wave
optical reconstruction of the holographic real
image, motion artifacts are eliminated. Focal analys
is of the real image yields a surface relief of the
patient. To generate a complete 360 patient model,
several synchronously recorded reliefs are
registered by automatic scan matching. We find the
transformation consisting of a rotation and a
translation that minimizes a cost function
containing the Euclidian distances between points
pairs from two surface relief maps. A variant of the
ICP (Iterative Closest Points) algorithm2 is used to
compute such a minimum. We propose a new fast
approximation based on kDtrees for the problem of
creating the closest point pairs on which the ICP
algorithm spends most of its time.
Nutzer