Person Search via a Mask-Guided Two-Stream CNN Model

Di Chen, Shanshan Zhang, Wanli Ouyang, Jian Yang, Ying Tai

Abstract: In this work, we tackle the problem of person search, which is a challenging task consisted of pedestrian detection and person re-identification (re-ID). Instead of sharing representations in a single joint model, we find that separating detector and re-ID feature extraction yields better performance. In order to extract more representative features for each identity, we propose a simple yet effective re-ID method, which models foreground person and original image patches individually, and obtains enriched representations from two separate CNN streams. On the standard person search benchmark datasets, we achieve mAP of \(83.0\%\) and \(32.6\%\) respectively for CUHK-SYSU and PRW, surpassing the state of the art by a large margin (more than 5 pp).