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文章导读丨南京信息工程大学Visibility-Guided Dual-Branch Network for Occluded Person Re-Identification

  • 2026-05-30 09:45:32
文章导读丨南京信息工程大学Visibility-Guided Dual-Branch Network for Occluded Person Re-Identification

Visibility-Guided Dual-Branch Networkfor Occluded Person Re-Identification

RESEARCH
01
研究背景

作为智慧城市安防体系的关键技术,行人重识别(Re-ID)旨在跨摄像头实现目标的持续追踪与身份匹配。然而,实际监控环境下,行人常被建筑物、车辆或其他个体部分遮挡,导致人体的关键身份特征丢失,降低了系统的识别精度与可靠性。

★ PAPER HIGHLIGHT

近日,南京信息工程大学的 An Menghan、Zhang Yanyan、Qin Yu 等作者以 《Visibility-Guided Dual-Branch Network for Occluded Person Re-Identification》 为题,在《Instrumentation》发表了研究成果。该研究提出可见性引导双分支网络(VGDNet),通过自适应机制平衡全局与局部特征,在不增加外部开销的前提下解决了遮挡重识别难题。

02
主要创新点
创新点 1

引入位置注意力机制,通过计算注意力分布的归一化信息熵定量评估遮挡程度,从而动态调节特征权重。

创新点 2

全局分支利用 Top DropBlock 抑制高激活区,挖掘潜在关键特征;局部分支通过区域重组与特征拼接增强区域间的类别区分度。

创新点 3

融合标签平滑身份损失、多相似度损失及三元组损失,协同优化特征空间的类内紧凑性与类间差异性,提升了模型的泛化能力。

03
数据概览
FIGURE 01 · 网络结构

图 1  VGDNet 整体网络结构图

展示了从 OSNet 骨干网络到可见性因子引导的双分支架构,包括全局补充分支与局部分支双路并行的处理流程。

FIGURE 02 · 信息熵可视化

图 2  注意力机制下的信息熵可视化

展示了通过位置注意力矩阵计算信息熵的过程,定量反映了模型在处理遮挡(高熵 / 分散)与非遮挡(低熵 / 集中)区域时的确定性程度。

FIGURE 03 · 检索效果对比

图 3  遮挡场景下行人识别结果的可视化

对比了经典模型与 VGDNet 在处理行人间遮挡和物体遮挡时的 Top-10 检索效果,VGDNet 能更准确地抑制遮挡物干扰并捕获目标行人特征。

04
成果展望与结论

本研究证明,VGDNet 通过自适应可见性引导机制,能在不增加外部辅助模型负担的情况下,有效应对行人重识别中的遮挡难题。在主流数据集上的实验结果表明,该模型在保持轻量化设计的同时,达到了领先的识别性能

该成果可广泛应用于智能安防监控、智慧社区建设等领域,特别是在人流密集的复杂环境中具有极高的实际应用价值。未来,团队将进一步探索特征补全机制,并优化模型在低分辨率视频流下的识别鲁棒性,以适应更严苛的现实场景。

" 在不依赖外部辅助模型的前提下,让网络"自己学会"识别遮挡区域 —— 这是 VGDNet 给遮挡行人重识别难题给出的简洁而有力的回答。 "

END
CITE THIS
论文信息

An Menghan, Zhang Yanyan, Qin Yu, et al. Visibility-Guided Dual-Branch Network for Occluded Person Re-Identification[J]. Instrumentation.

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  1. CONNECT:[ UseTime:0.000997s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001466s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.001299s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.001187s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001415s ]
  6. SELECT * FROM `set` [ RunTime:0.007383s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.002089s ]
  8. SELECT * FROM `article` WHERE `id` = 565893 LIMIT 1 [ RunTime:0.024745s ]
  9. UPDATE `article` SET `lasttime` = 1780363982 WHERE `id` = 565893 [ RunTime:0.009778s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.001858s ]
  11. SELECT * FROM `article` WHERE `id` < 565893 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.009700s ]
  12. SELECT * FROM `article` WHERE `id` > 565893 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.002294s ]
  13. SELECT * FROM `article` WHERE `id` < 565893 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.028694s ]
  14. SELECT * FROM `article` WHERE `id` < 565893 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.015657s ]
  15. SELECT * FROM `article` WHERE `id` < 565893 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.007191s ]
0.306588s