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arXiv 2210.00527cs.LGcs.HC
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任意运动序列上用户识别的数据表示与机器学习架构比较

Comparison of Data Representations and Machine Learning Architectures for User Identification on Arbitrary Motion Sequences

University of Würzburg(维尔茨堡大学)

Christian Schell, Andreas Hotho, Marc Erich Latoschik

AI总结:

本文比较三种运动数据编码与五种机器学习架构在XR用户识别中的表现,发现LSTM结合身体相对数据可在150秒内以100%准确率识别34名用户。

摘要:

可靠且稳健的用户识别与身份认证是许多数字服务中重要且往往必要的需求。在社交虚拟现实(VR)中,这一点变得至关重要,尤其是在与逼真、栩栩如生的虚拟化身进行数字接触时,这些化身是真实人物的忠实复制。近期研究表明,用户在扩展现实(XR)系统中的运动携带用户特定信息,因此可用于验证其身份。本文比较了来自头部和手部的运动数据的三种不同潜在编码方式(场景相对、身体相对和身体相对速度),以及五种不同机器学习架构(随机森林、多层感知机、全循环神经网络、长短期记忆网络、门控循环单元)的性能。我们使用公开数据集“Talking with Hands”,并公开所有代码,以保证可复现性并为未来工作提供基线。经过超参数优化后,长短期记忆网络架构与身体相对数据的组合优于其他竞争组合:该模型在150秒内以100%的准确率正确识别34名受试者中的任意一位。总体而言,我们的方法为基于行为计量的识别与认证提供了有效基础,可为研究人员和实践者提供指导。数据和代码已发布在 https://go.uniwue.de/58w1r。

英文摘要:

Reliable and robust user identification and authentication are important and often necessary requirements for many digital services. It becomes paramount in social virtual reality (VR) to ensure trust, specifically in digital encounters with lifelike realistic-looking avatars as faithful replications of real persons. Recent research has shown that the movements of users in extended reality (XR) systems carry user-specific information and can thus be used to verify their identities. This article compares three different potential encodings of the motion data from head and hands (scene-relative, body-relative, and body-relative velocities), and the performances of five different machine learning architectures (random forest, multi-layer perceptron, fully recurrent neural network, long-short term memory, gated recurrent unit). We use the publicly available dataset "Talking with Hands" and publish all code to allow reproducibility and to provide baselines for future work. After hyperparameter optimization, the combination of a long-short term memory architecture and body-relative data outperformed competing combinations: the model correctly identifies any of the 34 subjects with an accuracy of 100% within 150 seconds. Altogether, our approach provides an effective foundation for behaviometric-based identification and authentication to guide researchers and practitioners. Data and code are published under https://go.uniwue.de/58w1r.

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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