Cross-Camera Person Re-Identification With Body-Guided Attention Network

Various challenges exist throughout person re-identification (ReID) process, including background clutters, illumination variation, pose variation, occlusion, etc. Addressing these problems, this paper explores the incorporation of human attention mechanism in person ReID and proposes an attention-aware model named Body-guided Attention Network (BANet). The proposed attention is based on the body masked images which are obtained by a reliable pixel-level segmentation strategy. To optimize the feature representation learning so as to pay more attention to the discriminative details of human body, BANet is built. It is composed of three attention branches. In order to guide attention learning layer by layer, these branches are applied to the convolution features of different levels. The proposed BANet aims to fully utilize fine-grained information of body region to guide the final process of feature extraction. Extensive experiments on benchmarks including CUHK03, Market1501 and DukeMTMC-reID show that BANet can achieve state-of-the-art performance, which validates the importance of attention mechanism in person ReID.