Differentiable time-gated rendering

Differentiable time-gated rendering
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可微时间选通渲染

DOI:
10.1145/3478513.3480489
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发表时间:
2021
影响因子:
6.2
通讯作者:
Zhao, Shuang
Zhao, Shuang
中科院分区:
计算机科学1区
文献类型:
--
作者:
Wu, Lifan;Cai, Guangyan;Ramamoorthi, Ravi;Zhao, Shuang

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飞行时间成像设备的持续进步已经实现了具有许多应用的新成像管道。因此,已经引入了能够准确和有效地模拟这些设备的几种前向渲染技术。然而,估计飞行时间图像的导数的通用可微分渲染技术仍然缺乏。在本文中,我们介绍了一个新的理论,可微分的时间门绘制享有的一般性,就任意场景参数的微分。我们的理论还允许先进的Monte Carlo估计能够处理相机与近三角洲或不连续的时间gate.We验证我们的理论通过比较我们的技术和有限差分产生的衍生物的设计。此外,我们证明了我们的技术的有用性,使用几个概念验证逆渲染的例子,模拟几个飞行时间成像方案。
The continued advancements of time-of-flight imaging devices have enabled new imaging pipelines with numerous applications. Consequently, several forward rendering techniques capable of accurately and efficiently simulating these devices have been introduced. However, general-purpose differentiable rendering techniques that estimate derivatives of time-of-flight images are still lacking. In this paper, we introduce a new theory of differentiable time-gated rendering that enjoys the generality of differentiating with respect to arbitrary scene parameters. Our theory also allows the design of advanced Monte Carlo estimators capable of handling cameras with near-delta or discontinuous time gates.We validate our theory by comparing derivatives generated with our technique and finite differences. Further, we demonstrate the usefulness of our technique using a few proof-of-concept inverse-rendering examples that simulate several time-of-flight imaging scenarios.
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