Path Replay Backpropagation: Differentiating Light Paths using Constant Memory and Linear Time

Path Replay Backpropagation: Differentiating Light Paths using Constant Memory and Linear Time
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路径重放反向传播:使用恒定内存和线性时间区分光路

DOI:
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发表时间:
2021
期刊:
影响因子:
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通讯作者:
Delio Vicini
Delio Vicini
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作者:
Delio Vicini

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Fig. 1.复杂光照异构场景的逆向重建。给定初始化(a),我们寻求重建目标(B),涉及鱼雕塑上的法线映射表面变化和粗糙度变化,以及基于三角形几何形状添加植物。使用目标的三个渲染视图,我们应用我们提出的路径重放反向传播(PRB)(c)和辐射反向传播(RB)的线性时间版本[Nimier-David et al. 2020](d)来重建修改后的雕塑和近似植物的异质介质。我们的方法计算无偏梯度,并能够在相同的时间收敛到更高质量的解决方案。第二行和第三行示出了插图和PRB随时间的收敛。
Fig. 1. Inverse reconstruction of a scene with complex lighting and heterogeneous structure. Given the initialization (a), we seek to reconstruct the target (b) involving normal-mapped surface variation and roughness changes on the fish sculpture, and the addition of a plant based on triangular geometry. Using three rendered views of the target, we apply our proposed path replay backpropagation (PRB) (c) and a linear-time version of radiative backpropagation (RB) [Nimier-David et al. 2020] (d) to reconstruct the modified sculpture and a heterogeneous medium approximating the plant. Our method computes unbiased gradients and is able to converge to a higher-quality solution at equal time. The second and third rows show insets and PRB’s convergence over time.
可解释的多项式神经常微分方程。
DOI: 10.1063/5.0130803
发表时间: 2023
期刊: Chaos (Woodbury, N.Y.)
影响因子: --
作者:
Fronk,Colby;Petzold,Linda
通讯作者: Petzold,Linda