A Marker Calibration Method Utilizing A Priori Knowledge on Marker Arrangement

Abstract

This paper describes a calibration method of markers which are used for registration in MR applications. In vision-based registration methods where multiple markers are utilized, it is necessary that the geometric information of the marker arrangement such as their positions and orientations be known in advance. In this paper, we propose a hybrid method combining the conventional bundle adjustment method with some constraints on the marker arrangement which are obtained a priori. After showing the basic framework that achieves our concept, the specific solutions for some typical constraints are described. Then, some experiments are shown to prove the effectiveness of our method.