Bimodal Discriminant Projection Analysis for gait recognition

As for gait recognition, we propose a new discriminant dimensionality reduction method, named Bimodal Discriminant Projection Analysis (BDPA) algorithm. In BDPA, a weight path-based similarity measure is designed, the intra-class scatter matrix is constructed by the weight, while the inter-class scatter matrix is constructed by the heat kernel function. Compared with the classical methods, such as Multimodal Preserving Embedding (MPE) and Minimax Risk Criterion methods, the proposed method can preserve within-class neighborhood geometry and extract between-class relevant structures for recognition by minimizing the intra-class scatter and maximizing the inter-class scatter. The experimental results on real-world gait data show that BDPA is effective and feasible for gait recognition.