arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 2408.02684cs.LGstat.ML
收藏

随机森林的开集识别

Open Set Recognition for Random Forest

BlackRock, Inc.(贝莱德公司)

Guanchao Feng, Dhruv Desai, Stefano Pasquali, Dhagash Mehta

AI总结:

针对随机森林默认闭集运行、无法识别未知类别的问题,本文结合距离度量学习与基于距离的开集识别,为其赋予开集能力,并在合成与真实数据集上验证其优于现有方法。

摘要:

在许多现实世界的分类或识别任务中,由于训练期间知识不完整或环境不断变化等原因,往往难以收集穷尽所有可能类别的训练样本。因此,在测试或部署过程中可能会遇到来自未知或新类别的样本。在这种情况下,分类器应当能够:i)对已知类别执行分类,同时 ii)识别来自未知类别的样本。这被称为开集识别。尽管随机森林作为一种通用分类(及回归)方法已经是极其成功的框架,但在实践中,它通常在闭集假设下运行,开箱即用时无法识别来自新类别的样本。在本工作中,我们提出了一种新方法,通过结合距离度量学习和基于距离的开集识别,使随机森林分类器具备开集识别能力。所提出的方法在合成数据集和现实世界数据集上均得到验证。实验结果表明,所提方法优于最先进的基于距离的开集识别方法。

英文摘要:

In many real-world classification or recognition tasks, it is often difficult to collect training examples that exhaust all possible classes due to, for example, incomplete knowledge during training or ever changing regimes. Therefore, samples from unknown/novel classes may be encountered in testing/deployment. In such scenarios, the classifiers should be able to i) perform classification on known classes, and at the same time, ii) identify samples from unknown classes. This is known as open-set recognition. Although random forest has been an extremely successful framework as a general-purpose classification (and regression) method, in practice, it usually operates under the closed-set assumption and is not able to identify samples from new classes when run out of the box. In this work, we propose a novel approach to enabling open-set recognition capability for random forest classifiers by incorporating distance metric learning and distance-based open-set recognition. The proposed method is validated on both synthetic and real-world datasets. The experimental results indicate that the proposed approach outperforms state-of-the-art distance-based open-set recognition 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。

↑