Fig. 6

Consistency between the initial skeleton data and the B-spline skeleton data. a Initial skeletal topology. b B-spline skeleton topology. c Matching of the initial skeleton topology and B-spline skeleton topology. d Line image of the discrete data points on the initial skeleton of PCAr. e Line image of 20 sampling points on the B-spline skeleton of PCAr. f Matching of discrete data points from the initial skeleton and 20 sampling points on the B-spline skeleton of PCAr