首次在多视角数据上实现新类别发现,提升聚类稳定性与准确性。
Intra-view and Inter-view Correlation Guided Multi-view Novel Class Discovery
- 利用视角内分布相似性与视角间关系指导聚类
- 通过矩阵分解分离共享基底与样本关系,提升特征表达
- 适合多组学等多视角新类别发现场景
本文针对新类别发现(NCD)问题,旨在利用互不重叠的已知类别知识对新类别进行聚类。现有方法主要基于单视图数据,忽略日益常见的多视图数据(如疾病诊断中的多组学数据),且依赖伪标签监督,易受噪声和特征维度影响,导致性能不稳定。为此,我们提出首个面向多视图新类别发现的框架——基于视角内与视角间相关性的多视图新类别发现(IICMVNCD)。在视图内层面,通过矩阵分解将特征分解为视图特异的共享基矩阵与因子矩阵:基矩阵捕捉已知与新类别的分布一致性,因子矩阵建模样本间的成对关系;在视图间层面,利用已知类别的视图关系生成预测标签,并根据监督损失动态调整已知类别的视图权重,再传递至新类别学习。实验验证了该方法的有效性。
原文摘要 · Abstract (English)
In this paper, we address the problem of novel class discovery (NCD), which aims to cluster novel classes by leveraging knowledge from disjoint known classes. While recent advances have made significant progress in this area, existing NCD methods face two major limitations. First, they primarily focus on single-view data (e.g., images), overlooking the increasingly common multi-view data, such as multi-omics datasets used in disease diagnosis. Second, their reliance on pseudo-labels to supervise novel class clustering often results in unstable performance, as pseudo-label quality is highly sensitive to factors such as data noise and feature dimensionality. To address these challenges, we propose a novel framework named Intra-view and Inter-view Correlation Guided Multi-view Novel Class Discovery (IICMVNCD), which is the first attempt to explore NCD in multi-view setting so far. Specifically, at the intra-view level, leveraging the distributional similarity between known and novel classes, we employ matrix factorization to decompose features into view-specific shared base matrices and factor matrices. The base matrices capture distributional consistency among the two datasets, while the factor matrices model pairwise relationships between samples. At the inter-view level, we utilize view relationships among known classes to guide the clustering of novel classes. This includes generating predicted labels through the weighted fusion of factor matrices and dynamically adjusting view weights of known classes based on the supervision loss, which are then transferred to novel class learning. Experimental results validate the effectiveness of our proposed approach.
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