Manifold Learning Based Gait Feature Reduction and Recognition

The moving objectives’ images are in tensor format in reality. That using for reference the thought of tensor space dimension reduction to gain the optimal gait characters with low dimension inaugurate a new gait recognition way. A novel gait expression and recognition algorithm based on the tensor space is introduced here. It is a tensor space learning algorithm that could investigate the inherent geometrical structure of the data manifold. The within-class and the between-class similarity graphs are respectively defined so as to preserve the local structure of the manifold and the global data information. It improves the ability of gait data reconstructing and the recognizing efficiency. The optimization problem of finding the optimal tensor subspace is deduced to an iteratively computation problem about resolving the generalized eigenvectors. The optimal tensor is used to express the gait character and recognize the individual. And it reduced the gait character dimension, at the same time the storage and calculation cost were cut down. The experiments with the SOTON gait database demonstrated the validity of the proposed method. And the comparison among the tensor subspace analysis, the principal component analysis, the linear discriminate analysis and proposed method showed that the recognition performance of the our improved algorithm outperformed others.