块对角引导的多视角一致性学习

    Multi-view Consistency Learning with Block Diagonal Guidance

    • 摘要: 基于图的多视角聚类方法得到了广泛的研究。然而,现有方法仍然存在两个问题:(1) 有些方法虽然将相似矩阵划分为一致性矩阵和不一致性矩阵,但难以处理被错误划分到不一致性矩阵中的一致性信息,导致有效信息不能得到充分提取。(2) 有些方法虽然得到了具有块对角结构的统一相似矩阵,但没有去除统一相似矩阵中的冗余信息。为了解决这两个问题,本文提出了一种块对角引导的多视角一致性学习(Multi-view Consistency Learning with Block Diagonal Guidance, MCLBDG) 方法。首先,该方法通过低秩表示和自适应邻域的方式获得每个视角的相似矩阵;其次,将每个视角的相似矩阵划分为一致性矩阵和不一致性矩阵。其中,不同视角的不一致性部分通过哈达玛积来筛选。在迭代过程中,被错误划分的一致性部分可以从不一致性信息中逐步提取出来。此外,提出了块对角引导来尽可能去除统一相似矩阵中的冗余信息,减少了不同簇样本之间的干扰。最后,将谱聚类应用到模型当中,直接得到聚类结果。在几个常用数据集上的比较实验验证了该方法的优越性。

       

      Abstract: Graph-based multi-view clustering methods are widely explored. However, there are still two problems with existing methods: 1) Although some methods divide the similarity matrix into a consistency matrix and an inconsistency matrix, it is difficult to deal with the consistency information that has been misclassified in the inconsistency matrix, resulting in insufficient extraction of the valid information; and 2) Although some methods obtain a unified similarity matrix with a block diagonal structure, they do not remove redundancy information from the unified similarity matrix. To address these two issues, this paper proposes a Multi-view Consistency Learning with Block Diagonal Guidance (MCLBDG) method. First, we obtain a similarity matrix for each view via low rank representation and adaptive neighborhood. Second, we divide the similarity matrix of each view into a consistency matrix and an inconsistency matrix. The inconsistency part of different views is sieved via Hadamard product. During iterations, the misclassified consistency part can be gradually extracted from the inconsistency information. In addition, block diagonal guidance is proposed to remove the redundancy information in the unified similarity matrix as much as possible, which reduces the interference of extra-cluster samples. Finally, spectral clustering is incorporated into the model to obtain clustering results directly. Comparative experimental results on the commonly used datasets demonstrate the superiority of the method over the existing methods.

       

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