Spatial co-occurrence of local intensity order for face recognition

In this paper, we propose a simple but effective spatial co-occurrence of local intensity order (CoLIO) feature for face recognition. Local intensity order (LIO) is robust to illumination variance. Spatial co-occurrence of LIO not only preserves great invariance to illumination, but also greatly enhances the discriminative power of the descriptor as Co- LIO well captures the correlation between locally adjacent regions. The proposed feature has been successfully applied to two widely used face databases including AR [1] and LFW [2]. Superior performance on these two databases fully demonstrates the effectiveness of the proposed feature. Meanwhile, the extremely fast extraction speed makes the proposed feature practically useful.