We present a novel deep neural network architecture for unsupervised subspace clustering. This architecture is built upon deep auto-encoders, which non-linearly map the input data into a latent space. Our key idea is to introduce a novel self-expressive layer between the encoder and the decoder to mimic the "self-expressiveness" property that has proven effective in traditional subspace clustering. Being differentiable, our new self-expressive layer provides a simple but effective way to learn pairwise affinities between all data points through a standard back-propagation procedure. Being nonlinear, our neural-network based method is able to cluster data points having complex (often nonlinear) structures. We further propose pre-training and fine-tuning strategies that let us effectively learn the parameters of our subspace clustering networks. Our experiments show that the proposed method significantly outperforms the state-of-the-art unsupervised subspace clustering methods.

本文提出了一种基于深度自编码器的无监督子空间聚类新颖深度神经网络架构，其中引入了一种自相似层，以模拟传统子空间聚类方法中的“自相似”属性。该方法能够在非线性方式下对具有复杂结构的数据点进行聚类，并且在实验中表现出优于现有方法的性能。

深度子空间聚类网络