The main challenge in the Visible-Infrared Person Re-Identification (VI-ReID) task lies in how to extract discriminative features from different modalities for matching purposes. While the existing well works primarily focus on minimizing the modal discrepancies, the modality information can not thoroughly be leveraged. To solve this problem, a Multi-scale Semantic Correlation Mining network (MSCMNet) is proposed to comprehensively exploit semantic features at multiple scales and simultaneously reduce modality information loss as small as possible in feature extraction. The proposed network contains three novel components. Firstly, after taking into account the effective utilization of modality information, the Multi-scale Information Correlation Mining Block (MIMB) is designed to explore semantic correlations across multiple scales. Secondly, in order to enrich the semantic information that MIMB can utilize, a quadruple-stream feature extractor (QFE) with non-shared parameters is specifically designed to extract information from different dimensions of the dataset. Finally, the Quadruple Center Triplet Loss (QCT) is further proposed to address the information discrepancy in the comprehensive features. Extensive experiments on the SYSU-MM01, RegDB, and LLCM datasets demonstrate that the proposed MSCMNet achieves the greatest accuracy.

通过多尺度语义相关性挖掘网络（MSCMNet），从不同的模态中提取有区分性的特征用于匹配的任务中，最大的挑战在于如何全面利用语义特征以及尽可能减少特征提取中的模态信息损失。该网络包含三个主要组成部分：多尺度信息相关性挖掘模块（MIMB）用于关联多尺度语义特征，四重流特征提取器（QFE）用于从数据集的不同维度提取信息以丰富语义信息，以及四重中心三重损失（QCT）用于解决综合特征中的信息差异问题。在SYSU-MM01、RegDB和LLCM数据集上进行的广泛实验表明，所提出的MSCMNet具有最高的准确性。

可见光-红外人员再识别的多尺度语义相关挖掘