arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1606.08282stat.MLcs.CGcs.CVcs.LGcs.NE
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带噪时间序列的样本外扩展降维

Out-of-Sample Extension for Dimensionality Reduction of Noisy Time Series

University of Massachusetts, Amherst(马萨诸塞大学阿默斯特分校)

Hamid Dadkhahi, Marco F. Duarte, Benjamin Marlin

摘要:

本文提出了一种全局流形学习算法(Isomap)的样本外扩展框架,该算法使用样本点外的时间信息,以使嵌入对噪声和伪影更具鲁棒性。给定一组无噪声训练数据及其嵌入,所提出的框架扩展了有噪声时间序列的嵌入。这是通过向嵌入的优化目标添加时空紧凑性项来实现的。据我们所知,这是第一种利用扩展集可用的时序信息对流形嵌入进行样本外扩展的方法。实验结果表明,我们的样本外扩展算法呈现出更强大的和准确的嵌入顺序排序的图像数据在存在各种噪声和文物相比,其他时间感知嵌入。此外,我们表明,基于所提出的算法的样本外扩展框架优于现有技术的眼睛注视估计。

英文摘要:

This paper proposes an out-of-sample extension framework for a global manifold learning algorithm (Isomap) that uses temporal information in out-of-sample points in order to make the embedding more robust to noise and artifacts. Given a set of noise-free training data and its embedding, the proposed framework extends the embedding for a noisy time series. This is achieved by adding a spatio-temporal compactness term to the optimization objective of the embedding. To the best of our knowledge, this is the first method for out-of-sample extension of manifold embeddings that leverages timing information available for the extension set. Experimental results demonstrate that our out-of-sample extension algorithm renders a more robust and accurate embedding of sequentially ordered image data in the presence of various noise and artifacts when compared to other timing-aware embeddings. Additionally, we show that an out-of-sample extension framework based on the proposed algorithm outperforms the state of the art in eye-gaze estimation.

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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