Description     Claims     Drawing  

US2007103464A   [0005] 
JP2012024517A   [0059] 

Thinning Algorithms for Three-Dimensional Gray Images and Their Application to Medical Images with Comparative Evaluation of Performance   [0029] 
An Improvement of Three Dimensional Thinning Method Using a Skeleton Based on the Euclidean Distance Transformation-A Method to Control Spurious Branches   [0029]