Description

Abstract

Three-dimensional (3-D) palm print has proved to be a significant biometrics for personal 

authentication. Three- dimensional palm prints are harder to counterfeit than 2-D palm prints and

more robust to variations in illumination and serious scrabbling on the palm surface. Previous

work on 3-D palm-print recognition has concentrated on local features such as texture and lines.

In this paper, we propose three novel global features of 3-D palm prints which describe shape

information and can be used for coarse matching and indexing to improve the efficiency of

palm-print recognition, particularly in very large databases. The three proposed shape features

are maximum depth of palm cen- ter, horizontal cross-sectional area of different levels, and

radial line length from the centroid to the boundary of 3-D palm-print horizontal cross section of

different levels. We treat these features as a column vector and use orthogonal linear discriminant

anal- ysis to reduce their dimensionality. We then adopt two schemes:

1) coarse-level matching and 2) ranking support vector machine to improve the efficiency of

palm-print recognition. We conducted a series of 3-D palm-print recognition experiments using an

estab- lished 3-D palm-print database, and the results demonstrate that the proposed method can

greatly reduce penetration rates.