基于加权张量低秩约束的多视图谱聚类

Multiview Spectral Clustering Based on Weighted Tensor Low-Rank Constraint

现有基于图的多视图聚类方法通常难以同时考虑不同视图的潜在高阶相关信息和每个视图内的全局几何结构,导致聚类性能受限。为此,提出一种基于加权张量低秩约束的多视图谱聚类方法(WTLR-MSC)。根据多视图数据构建概率转移矩阵,将所有的概率转移矩阵构建为三阶张量,并借助鲁棒主成分分析思想将其分解为目标张量和误差张量。使用加权张量核范数约束目标张量的旋转张量,利用奇异值先验信息准确挖掘多视图数据的潜在高阶相关信息,并利用核范数约束目标张量的每个正切片以刻画每个视图内的全局几何结构。基于此建立数学模型,并设计有效的求解算法。在BBCSport、BBC4View、COIL20、UCI Digits 4个常用数据集上的实验结果表明,WTLR-MSC较ERLRT、MCA~2M、MGL-WTNN等聚类方法的性能有显著提升,准确率、标准化互信息、F1值、精确率、召回率相较于次优方法最高提升约1.3、1.0、1.2、1.6和0.8个百分点,大幅增强了多视图聚类的稳健性。

Many existing multiview clustering methods fail to simultaneously exploit the high-order correlations embedded in different views and the global geometric structure of each single view,resulting in inadequate clustering performance.A Weighted Tensor Low-Rank constraint-based Multiview Spectral Clustering(WTLR-MSC)method is proposed in this study to address this limitation.First,a set of transition probability matrices are constructed from each single view.Second,a three-order tensor,which is decomposed into object and error tensors,is constructed using these matrices.The object tensor is rotated and constrained using the weighted tensor nuclear norm.Thus,the high-order correlations can be investigated efficiently.Simultaneously,the nuclear norm is applied to regularize each frontal slice of the object tensor to obtain the global geometric structure of each view.This study proposes an efficient optimization algorithm to solve the challenged mathematical optimization problem.Experiments on four datasets(BBCSport,BBC4View,COIL20,and UCI Digits)indicate that WTLR-MSC outperforms many state-of-the-art multiview methods,such as ERLRT,MCA2M,and MGL-WTNN.In terms of Accuracy(ACC),Normalized Mutual Information(NMI),F1-score,Precision,and Recall,WTLR-MSC improves by approximately 1.3,1.0,1.2,1.6,and 0.8 percentage points,demonstrating an enhanced robustness of multiview clustering.