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arXiv 2310.09892cs.RO
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使用神经辐射场的主动感知

Active Perception using Neural Radiance Fields

University of Pennsylvania(宾夕法尼亚大学)

Siming He, Christopher D. Hsu, Dexter Ong, Yifei Simon Shao, Pratik Chaudhari

AI总结:

本文提出基于NeRF的主动感知框架,通过最大化过去与未来观测间的互信息,结合生成式场景表示、语义不确定性与采样规划,实现杂乱室内环境的自主探索。

摘要:

我们从第一性原理出发研究主动感知,以论证执行主动感知的自主智能体应当最大化过去观测对未来的观测所具有的互信息。要做到这一点,需要(a)一种场景表示,它能够总结过去的观测,并具备更新该表示以纳入新观测的能力(状态估计与建图);(b)合成场景新观测的能力(生成模型);以及(c)选择能够最大化预测信息的控制轨迹的能力(规划)。这促使我们采用一种类似神经辐射场(NeRF)的表示,该表示能够捕捉场景的光度、几何和语义属性并使其具有基础性。这种表示非常适合从不同视点合成新观测。由此,可以使用基于采样的规划器,沿动力学可行的轨迹,根据合成观测来计算预测信息。我们使用主动感知来探索杂乱的室内环境,并采用语义不确定性的概念来检查探索任务是否成功完成。我们通过在逼真的三维室内环境中进行仿真来展示这些思想。

英文摘要:

We study active perception from first principles to argue that an autonomous agent performing active perception should maximize the mutual information that past observations posses about future ones. Doing so requires (a) a representation of the scene that summarizes past observations and the ability to update this representation to incorporate new observations (state estimation and mapping), (b) the ability to synthesize new observations of the scene (a generative model), and (c) the ability to select control trajectories that maximize predictive information (planning). This motivates a neural radiance field (NeRF)-like representation which captures photometric, geometric and semantic properties of the scene grounded. This representation is well-suited to synthesizing new observations from different viewpoints. And thereby, a sampling-based planner can be used to calculate the predictive information from synthetic observations along dynamically-feasible trajectories. We use active perception for exploring cluttered indoor environments and employ a notion of semantic uncertainty to check for the successful completion of an exploration task. We demonstrate these ideas via simulation in realistic 3D indoor environments.

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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