Optical body-surface profiling with coded markers for medical image registration

This paper investigates a three-dimensional body-surface optical measurement technique by solving the correspondence problem with the coded markers. The coded markers are printed patterns fixed on the object to be measured. The unique code number of each marker is decoded by using computer-based image processing. Given more than 2¹² available codes, the three dimensional profile of the torso surface is well approximated with the coded markers. In addition, the focal length and the camera location are found automatically by using the fiducial coded markers at given locations. The proposed body-surface measurement method is suitable for solving the registration problem for non-anatomical medical images such as body-surface potential maps (BSPM) and magnetocardiograms (MCG).