Learning Sparse Features in Granular Space for Multi-View Face Detection

In this paper, a novel sparse feature set is introduced into the Adaboost learning framework for multi-view face detection (MVFD), and a learning algorithm based on heuristic search is developed to select sparse features in granular space. Compared with Haar-like features, sparse features are more generic and powerful to characterize multi-view face pattern that is more diverse and asymmetric than frontal face pattern. In order to cut down search space to a manageable size, we propose a multi-scaled search algorithm that is about 6 times faster than brute-force search. With this method, a MVFD system is implemented that covers face pose changes over +/-45° rotation in plane (RIP) and +/-90° rotation off plane (ROP). Experiments over well-know test set are reported to show its high performance in both accuracy and speed.

• Type: Conference
• Year: 2006
• Where: FGR
• Authors: Chang Huang, Haizhou Ai, Yuan Li, Shihong Lao
• Keywords: FGR 2006, Multi-view Face, Multi-view Face Detection, Sparse Features