Patent ID: 9436888
Filing Date: 2016-09-06
CPC Classification: G06K,G06T

Claim Text:
1. A method for determining a boundary surface network of a tubular object, comprising: providing an ordered series of contours on the basis of image data in a source space; specifying a transformation function for at least two consecutive contours in the ordered series, from the source space into a unit space, the unit space being a three-dimensional Euclidean space having a normalized length, width and height, and which is different from the source space; creating a unit space segment object in the unit space on the basis of the at least two consecutive contours; determining a local signed distance function in the unit space for the unit space segment object; determining relative positional information of a query point in the source space from a surface of a segment object in the source space, the segment object being based on the consecutive contours, on the basis of the local signed distance function in the unit space and using the transformation function; and creating the boundary surface network on the basis of the determined relative positional information; wherein the contours are freeform contours.