Registration of 3-D head surfaces using multiple landmarks

Author

Fright, W. Richard ; Linney, Alf D.

Author_Institution

Univ. Coll. London, UK

Volume

12

Issue

3

fYear

1993

fDate

9/1/1993 12:00:00 AM

Firstpage

515

Lastpage

520

Abstract

A mathematical procedure based on Newton´s method is described that enables surface measurements to be registered, or normalized, with respect to spatial position, orientation, and, optionally, scale in three dimensions. An operator is required to identify homologous landmarks on the computer graphics images of surfaces to be registered. In this application, where the method is used to measure changes in facial shape, these landmarks are restricted to parts of the surface that have remained unchanged between the surfaces to be registered. Error in the registration of landmarks is minimized in a least-squares sense; hence multiple landmarks are favored to minimize the effect of individual errors produced by the measuring system and the operator. Examples are presented using measurements of the head taken with an optical surface scanner and a conventional X-ray computed tomography scanner

Keywords

computerised tomography; medical image processing; 3D head surfaces registration; Newton´s method; computer graphics images; conventional X-ray computed tomography scanner; facial shape changes measurement; homologous landmarks; least-squares minimization; mathematical procedure; multiple landmarks; optical surface scanner; orientation; scale; spatial position; surface measurements; Application software; Computed tomography; Computer errors; Computer graphics; Head; Newton method; Optical sensors; Position measurement; Shape measurement; X-ray imaging;

fLanguage

English

Journal_Title

Medical Imaging, IEEE Transactions on

Publisher

ieee

ISSN

0278-0062

Type

jour

DOI

10.1109/42.241879

Filename

241879