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NeISF: Neural Incident Stokes Field for Geometry and Material Estimation

Chenhao Li · Taishi Ono · Takeshi Uemori · Hajime Mihara · Alexander Gatto · Hajime Nagahara · Yusuke Moriuchi

Arch 4A-E Poster #182
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Fri 21 Jun 10:30 a.m. PDT — noon PDT


Multi-view inverse rendering is the problem of estimating the scene parameters such as shapes, materials, or illuminations from a sequence of images captured under different viewpoints. Many approaches, however, assume single light bounce and thus fail to recover challenging scenarios like inter-reflections. On the other hand, simply extending those methods to consider multi-bounced light requires more assumptions to alleviate the ambiguity. To address this problem, we propose Neural Incident Stokes Fields (NeISF), a multi-view inverse rendering framework that reduces ambiguities using polarization cues. The primary motivation for using polarization cues is that it is the accumulation of multi-bounced light, providing rich information about geometry and material. Based on this knowledge, the proposed incident Stokes field efficiently models the accumulated polarization effect with the aid of an original physically-based differentiable polarimetric renderer. Lastly, experimental results show that our method outperforms the existing works in synthetic and real scenarios.

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