arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2009.05964cs.CV
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基于图正则化和活动点的半监督字典学习

Semi-supervised dictionary learning with graph regularization and active points

Institut LIST, CEA(法国原子能与替代能源委员会 LIST 研究所);Université Paris-Saclay(巴黎-萨克雷大学);Astrophysics Department, CEA(法国原子能与替代能源委员会天体物理部)

Khanh-Hung Tran, Fred-Maurice Ngole-Mboula, Jean-Luc Starck, Vincent Prost

摘要:

监督字典学习在近十年来获得了很大的兴趣,并在图像分类中表现出显着的性能改善。然而,一般来说,监督学习需要每个类大量的标记样本来实现可接受的结果。为了处理每类只有少量标记样本的数据库,使用了半监督学习,该学习在训练阶段也利用了未标记样本。事实上,未标记的样本可以帮助正则化学习模型,从而提高分类精度。本文提出了一种新的基于两个支柱的半监督字典学习方法:一方面,我们使用局部线性嵌入将原始数据的流形结构保持到稀疏代码空间中,这可以被认为是稀疏代码的正则化;另一方面,我们在稀疏代码空间中训练半监督分类器。我们表明,我们的方法提供了一个最先进的半监督字典学习方法的改进。

英文摘要:

Supervised Dictionary Learning has gained much interest in the recent decade and has shown significant performance improvements in image classification. However, in general, supervised learning needs a large number of labelled samples per class to achieve an acceptable result. In order to deal with databases which have just a few labelled samples per class, semi-supervised learning, which also exploits unlabelled samples in training phase is used. Indeed, unlabelled samples can help to regularize the learning model, yielding an improvement of classification accuracy. In this paper, we propose a new semi-supervised dictionary learning method based on two pillars: on one hand, we enforce manifold structure preservation from the original data into sparse code space using Locally Linear Embedding, which can be considered a regularization of sparse code; on the other hand, we train a semi-supervised classifier in sparse code space. We show that our approach provides an improvement over state-of-the-art semi-supervised dictionary learning methods.

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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