METHOD FOR DETERMINING THE LOCATION AND ORIENTATION OF A FIDUCIAL REFERENCE

摘要

A method for determining the 3D location and orientation of a fiducial reference comprises disposing the fiducial reference so as to render a part of the fiducial reference observable by a tracker; obtaining from the tracker scan data of the part of the fiducial reference that is observable by the tracker; obtaining predetermined geometric information about location points on the fiducial reference, the geometric information containing three-dimensional coordinates of the location points relative to the structure of the fiducial reference; identifying within the scan data at least three location points having coordinates in the predetermined geometric information; and determining from the scan data and the coordinates of the three identified location points in the predetermined geometric information the 3D location and orientation of the fiducial reference.

主权项

1. A method for determining the location and orientation of a fiducial reference in three dimensions, the method comprising
a. disposing the fiducial reference to render a part of the fiducial reference observable by a tracker; b. obtaining from the tracker scan data of the part of the fiducial reference that is observable by the tracker; c. obtaining predetermined geometric information about location points on the fiducial reference, the geometric information comprising three-dimensional coordinates of the location points relative to the structure of the fiducial reference; d. identifying within the scan data at least three location points having coordinates arranged along at least two non-parallel lines in the predetermined geometric information; and e. determining the three-dimensional location and orientation of the fiducial reference from the scan data and from the coordinates of the at least three identified location points in the predetermined geometric information.