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arXiv 1503.08356stat.ML
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低秩子空间聚类的在线最小化算法

Efficient Online Minimization for Low-Rank Subspace Clustering

Jie Shen, Ping Li, Huan Xu

摘要:

低秩表示(LRR)是一种有效的分割子空间并数据的方法。然而,已知求解LRR程序在时间复杂度和存储器占用方面具有挑战性,因为核范数正则化矩阵的大小是$n$乘$n$(其中$n$是样本的数量)。在本文中,我们从而开发了一个快速的在线实现LRR,减少了从$O(n^2)$到$O(pd)$的内存成本,$p$是周围的尺寸和$d$是一些估计秩~($d < p \ll n$)。为此目的的关键是LRR程序的非凸重构,其追求生成(未损坏的)观察的基字典。我们建立了理论保证,我们的算法产生的解决方案的序列收敛到一个稳定点的经验和期望损失函数渐近。在人工数据集和真实数据集上的大量实验进一步证实了该算法的快速性、鲁棒性和内存效率。

英文摘要:

Low-rank representation~(LRR) has been a significant method for segmenting data that are generated from a union of subspaces. It is, however, known that solving the LRR program is challenging in terms of time complexity and memory footprint, in that the size of the nuclear norm regularized matrix is $n$-by-$n$ (where $n$ is the number of samples). In this paper, we thereby develop a fast online implementation of LRR that reduces the memory cost from $O(n^2)$ to $O(pd)$, with $p$ being the ambient dimension and $d$ being some estimated rank~($d < p \ll n$). The crux for this end is a non-convex reformulation of the LRR program, which pursues the basis dictionary that generates the (uncorrupted) observations. We build the theoretical guarantee that the sequence of the solutions produced by our algorithm converges to a stationary point of the empirical and the expected loss function asymptotically. Extensive experiments on synthetic and realistic datasets further substantiate that our algorithm is fast, robust and memory efficient.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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