Abstract: To remove the burrs that occurred in skeleton extraction, it explains and verifies the solution of skeleton endpoints form a closed area. The skeleton at the intersection point was labeled and separated according to the various characteristics of burrs, Through the feature extraction, the conditions of eliminating burrs were set, and then sixteen structuring elements were designed according to the three principles－the similarity of shape, the covering of size and the composition of the different structuring elements, combined with the method of thinning by using structuring elements to remove the burrs absolutely. Lastly, these fiber segments were connected after the burrs were removed at the breakpoint according to the labels. The results show that this method can effectively solve the problems which are to eliminate the body and the end of skeleton because of wrong judgment, making as much of the main information about skeleton as possible retain, This method has certain feasibility and practicability.

Key words: skeleton extraction; removing burrs;structure elements;node