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arXiv 2007.02572cs.LGstat.ML
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一种新的用于多视图学习的随机森林相异性度量

A Novel Random Forest Dissimilarity Measure for Multi-View Learning

Université de Rouen Normandie(鲁昂诺曼底大学);École de Technologie Supérieure (ÉTS), Université du Québec(魁北克大学高等技术学院)

Hongliu Cao, Simon Bernard, Robert Sabourin, Laurent Heutte

摘要:

多视图学习是一种学习任务,其中数据由多个并发表示来描述。它的主要挑战通常是利用这些表示之间的互补性来帮助解决分类/回归任务。这是一个挑战,可以满足今天,如果有大量的数据可供学习。然而,这并不一定适用于所有现实世界的问题,其中数据有时是稀缺的(例如,与医疗环境有关的问题)。在这些情况下,一个有效的策略是使用基于实例之间的差异的中间表示。这项工作提出了新的方法来构建这些不同的表示,学习他们从数据与随机森林分类。更准确地说,提出了两种方法,修改随机森林的接近度的措施,使其适应的情况下,高维低样本量(HDLSS)的多视图分类问题。基于实例硬度测量的第二种方法比其他最先进的测量(包括原始RF接近度测量和大裕量最近邻(LMNN)度量学习测量)更精确。

英文摘要:

Multi-view learning is a learning task in which data is described by several concurrent representations. Its main challenge is most often to exploit the complementarities between these representations to help solve a classification/regression task. This is a challenge that can be met nowadays if there is a large amount of data available for learning. However, this is not necessarily true for all real-world problems, where data are sometimes scarce (e.g. problems related to the medical environment). In these situations, an effective strategy is to use intermediate representations based on the dissimilarities between instances. This work presents new ways of constructing these dissimilarity representations, learning them from data with Random Forest classifiers. More precisely, two methods are proposed, which modify the Random Forest proximity measure, to adapt it to the context of High Dimension Low Sample Size (HDLSS) multi-view classification problems. The second method, based on an Instance Hardness measurement, is significantly more accurate than other state-of-the-art measurements including the original RF Proximity measurement and the Large Margin Nearest Neighbor (LMNN) metric learning measurement.

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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