Implicit Discriminative Knowledge Learning for Visible-Infrared Person Re-Identification

• URL: http://arxiv.org/abs/2403.11708v3
• Date: Tue, 26 Mar 2024 13:21:52 GMT
• Title: Implicit Discriminative Knowledge Learning for Visible-Infrared Person Re-Identification
• Authors: Kaijie Ren, Lei Zhang,
• Abstract summary: Visible-Infrared Person Re-identification (VI-ReID) is a challenging cross-modal pedestrian retrieval task. Existing works mainly focus on embedding images of different modalities into a unified space to mine modality-shared features. We propose a novel Implicit Discriminative Knowledge Learning (IDKL) network to uncover and leverage the implicit discriminative information contained within the modality-specific.
• Score: 5.592360872268223
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Visible-Infrared Person Re-identification (VI-ReID) is a challenging cross-modal pedestrian retrieval task, due to significant intra-class variations and cross-modal discrepancies among different cameras. Existing works mainly focus on embedding images of different modalities into a unified space to mine modality-shared features. They only seek distinctive information within these shared features, while ignoring the identity-aware useful information that is implicit in the modality-specific features. To address this issue, we propose a novel Implicit Discriminative Knowledge Learning (IDKL) network to uncover and leverage the implicit discriminative information contained within the modality-specific. First, we extract modality-specific and modality-shared features using a novel dual-stream network. Then, the modality-specific features undergo purification to reduce their modality style discrepancies while preserving identity-aware discriminative knowledge. Subsequently, this kind of implicit knowledge is distilled into the modality-shared feature to enhance its distinctiveness. Finally, an alignment loss is proposed to minimize modality discrepancy on enhanced modality-shared features. Extensive experiments on multiple public datasets demonstrate the superiority of IDKL network over the state-of-the-art methods. Code is available at https://github.com/1KK077/IDKL.

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