融合双粒度特征的小样本分类模型
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厦门理工学院计算机与信息工程学院, 厦门 361024

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基金项目:

厦门市自然科学基金(3502Z202473069);福建省自然科学基金(2024J011192);国家自然科学基金(61976183);福建省科技计划项目(2025E3007)。


Few-Shot Classification Model with Fused Dual-Granularity Features
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College of Computer and Information Engineering, Xiamen University of Technology, Xiamen 361024, China

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Natural Science Foundation of Xiamen(No.3502Z202473069); Fujian Natural Science Foundation(No.2024J011192); National Natural Science Foundation of China(No.61976183); Fujian Science and Technology Program Project(No.2025E3007).

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    摘要:

    在小样本图像分类中,样本的数量通常较少,且现有的度量学习模型不能够很好地兼顾局部和全局信息,时常受到一些复杂背景的影响,从而不能很好地关注主体信息。针对这些问题,本文提出一种融合区域重组图像及子块特征的小样本分类模型DGRCN(Dual-granularity region confusion networks)。DGRCN算法引入多粒度思想,提出区域重组粒化(Region confusion granulation,RCG)方法,得到多粒度区域重组图像及多粒度子块序列,缓解样本不足问题;其次,分别从区域重组图像及子块序列提取了图像级与局部块级特征,细化注意力以突出关键区域,进行基于两类特征的多粒度特征融合;最后,自适应融合双特征的分类结果,兼顾了全局与局部的重点信息。DGRCN在公开数据集miniImageNet、CUB、Stanford Dogs进行了实验,与基线模型DN4相比准确率均略有提升,实验结果表明DGRCN能有效地提高小样本分类任务的性能。

    Abstract:

    In few-shot image classification, the number of samples is usually small. Moreover, existing metric learning models cannot well balance local and global information. They are often affected by complex backgrounds and thus cannot focus well on the main subject information. To address these issues, a few-shot classification model named dual-granularity region confusion networks (DGRCN) that integrates region-reorganized images and sub-block features is proposed. The DGRCN model introduces the multi-granularity idea and proposes the region confusion granulation (RCG) method. Through this method, multi-granularity region-reorganized images and multi-granularity sub-block sequences are obtained, which alleviates the problem of insufficient samples. Secondly, picture-level and patch-level features are extracted from the region-reorganized images and sub-block sequences, respectively. An attention mechanism is added to refine the areas of focus and perform multi-granularity feature fusion based on these two types of features. Finally, the classification results of the dual features are adaptively fused, taking into account both global and local key information. DGRCN is experimented on the public datasets miniImageNet, CUB and Stanford Dogs. Compared with the baseline model DN4, the accuracy has been slightly improved. Experimental results show that DGRCN can effectively improve the performance of few-shot classification tasks.

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周莹,陈玉明.融合双粒度特征的小样本分类模型[J].数据采集与处理,2026,(4):1133-1146

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  • 收稿日期:2025-03-19
  • 最后修改日期:2025-07-18
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  • 在线发布日期: 2026-08-13