A liana model for 3D finger vein representation

3D finger vein representation is the premise of 3D finger vein authentication. In this paper, a data organization model called liana model is presented for 3D finger vein representation. Firstly, four strategies including caliber uniformity, bine classification, node partition and spread restriction are proposed to covert the complex structure of 3D finger vein into a simple binary tree structure. Then, the liana model is developed based on the binary tree. Finally, the elements, attributes and mathematical descriptions of the model are described in detail. The new model is helpful for 3D finger vein representation and 3D features extraction.