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arXiv 2003.12120stat.MLcs.LGcs.RO
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Gaussian-Dirichlet随机场对高维分类观测值的推断

Gaussian-Dirichlet Random Fields for Inference over High Dimensional Categorical Observations

Massachusetts Institute of Technology(麻省理工学院);Woods Hole Oceanographic Institution(伍兹霍尔海洋研究所)

John E. San Soucie, Heidi M. Sosik, Yogesh Girdhar

摘要:

我们提出了一个生成模型的时空分布的高维分类观测。这些通常由配备有成像传感器(如相机)的机器人产生,与图像分类器配对,可能会产生数千个类别的观察结果。所提出的方法结合了使用Dirichlet分布模型稀疏共生关系的观察到的类别之间使用一个潜在的变量,和高斯过程模型的潜在变量的时空分布。本文中的实验表明,所得到的模型是能够有效地和准确地近似的时间分布的高维分类测量,如分类观察海洋中的微生物,即使在未观察到的(举行了)的位置,远离其他样本。这项工作的主要动机是使部署信息路径规划技术在高维分类领域,到目前为止,已被限制为标量或低维向量观测。

英文摘要:

We propose a generative model for the spatio-temporal distribution of high dimensional categorical observations. These are commonly produced by robots equipped with an imaging sensor such as a camera, paired with an image classifier, potentially producing observations over thousands of categories. The proposed approach combines the use of Dirichlet distributions to model sparse co-occurrence relations between the observed categories using a latent variable, and Gaussian processes to model the latent variable's spatio-temporal distribution. Experiments in this paper show that the resulting model is able to efficiently and accurately approximate the temporal distribution of high dimensional categorical measurements such as taxonomic observations of microscopic organisms in the ocean, even in unobserved (held out) locations, far from other samples. This work's primary motivation is to enable deployment of informative path planning techniques over high dimensional categorical fields, which until now have been limited to scalar or low dimensional vector observations.

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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