In the paper

A new skeleton definition of region based on chessboard distance is submitted

which is more close to the true figure of region than traditional skeleton

the algorithm is brief. Instead of only using the structure information of skeleton in traditional recognition method based on the skeleton information

The depth information and the structure information of skeleton are combined in the algorithm. A series of new feature to recognize the target is submitted in this paper also. The feasibility of the algorithm is proved by the experiment results.