Patch-based Face Recognition using a Hierarchical Multi-label Matcher
This work addresses face recognition tasks with a novel matcher, showing incremental improvements in accuracy on specific datasets.
The paper tackles patch-based face recognition by proposing a hierarchical multi-label matcher that iteratively divides face images into multi-level patches and trains classifiers for local and global matching, resulting in a 3% and 0.18% improvement in Rank-1 accuracy on the UHDB31 and IJB-A datasets compared to the UR2D system.
This paper proposes a hierarchical multi-label matcher for patch-based face recognition. In signature generation, a face image is iteratively divided into multi-level patches. Two different types of patch divisions and signatures are introduced for 2D facial image and texture-lifted image, respectively. The matcher training consists of three steps. First, local classifiers are built to learn the local matching of each patch. Second, the hierarchical relationships defined between local patches are used to learn the global matching of each patch. Three ways are introduced to learn the global matching: majority voting, l1-regularized weighting, and decision rule. Last, the global matchings of different levels are combined as the final matching. Experimental results on different face recognition tasks demonstrate the effectiveness of the proposed matcher at the cost of gallery generalization. Compared with the UR2D system, the proposed matcher improves the Rank-1 accuracy significantly by 3% and 0.18% on the UHDB31 dataset and IJB-A dataset, respectively.