Patent ID: 9043181
Filing Date: 2015-05-26
Classification: G06T,H01J

Abstract:
1. A method for determining coordinates for a destination system, the coordinates identifying a location of at least one selected point on a surface of an object from data provided from a source system, the data comprising source system reference coordinates for three reference points marked on the surface of the object and source system coordinates for the at least one selected point, the method comprising: providing the destination system with the source system reference coordinates and the source system coordinates for the at least one selected point; selecting pairs of the source system reference coordinates; identifying destination system reference coordinates from the three reference points; estimating at least three axial rotation angles of the reference points identified by the destination system reference coordinates relative to the reference points identified by the source system reference coordinates, wherein the axial rotation angles are determined by comparing the pairs of the source reference coordinates with corresponding pairs of the destination reference coordinates; estimating system axial origin offset values based on the source system reference coordinates and the destination system reference coordinates; calculating estimated coordinates of each destination system reference point based on at least one of the axial rotation angles, the system axial origin offset values and source reference coordinates; comparing the estimated coordinates of the destination system reference points with the destination system reference coordinates to determine which estimated axial rotation angle provides a least error value; and determining the destination system coordinates of the location of the at least one selected point from the system axial origin offset values, source coordinates for the at least one selected point and the estimated axial rotation angle that provides the least error value.