PlatoNeRF: 3D Reconstruction in Plato's Cave via Single-View Two-Bounce Lidar
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arXiv
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| Format: | Preprint |
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2023
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| author | Klinghoffer, Tzofi Xiang, Xiaoyu Somasundaram, Siddharth Fan, Yuchen Richardt, Christian Raskar, Ramesh Ranjan, Rakesh |
| author_facet | Klinghoffer, Tzofi Xiang, Xiaoyu Somasundaram, Siddharth Fan, Yuchen Richardt, Christian Raskar, Ramesh Ranjan, Rakesh |
| contents | 3D reconstruction from a single-view is challenging because of the ambiguity from monocular cues and lack of information about occluded regions. Neural radiance fields (NeRF), while popular for view synthesis and 3D reconstruction, are typically reliant on multi-view images. Existing methods for single-view 3D reconstruction with NeRF rely on either data priors to hallucinate views of occluded regions, which may not be physically accurate, or shadows observed by RGB cameras, which are difficult to detect in ambient light and low albedo backgrounds. We propose using time-of-flight data captured by a single-photon avalanche diode to overcome these limitations. Our method models two-bounce optical paths with NeRF, using lidar transient data for supervision. By leveraging the advantages of both NeRF and two-bounce light measured by lidar, we demonstrate that we can reconstruct visible and occluded geometry without data priors or reliance on controlled ambient lighting or scene albedo. In addition, we demonstrate improved generalization under practical constraints on sensor spatial- and temporal-resolution. We believe our method is a promising direction as single-photon lidars become ubiquitous on consumer devices, such as phones, tablets, and headsets. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2312_14239 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | PlatoNeRF: 3D Reconstruction in Plato's Cave via Single-View Two-Bounce Lidar Klinghoffer, Tzofi Xiang, Xiaoyu Somasundaram, Siddharth Fan, Yuchen Richardt, Christian Raskar, Ramesh Ranjan, Rakesh Computer Vision and Pattern Recognition Image and Video Processing 3D reconstruction from a single-view is challenging because of the ambiguity from monocular cues and lack of information about occluded regions. Neural radiance fields (NeRF), while popular for view synthesis and 3D reconstruction, are typically reliant on multi-view images. Existing methods for single-view 3D reconstruction with NeRF rely on either data priors to hallucinate views of occluded regions, which may not be physically accurate, or shadows observed by RGB cameras, which are difficult to detect in ambient light and low albedo backgrounds. We propose using time-of-flight data captured by a single-photon avalanche diode to overcome these limitations. Our method models two-bounce optical paths with NeRF, using lidar transient data for supervision. By leveraging the advantages of both NeRF and two-bounce light measured by lidar, we demonstrate that we can reconstruct visible and occluded geometry without data priors or reliance on controlled ambient lighting or scene albedo. In addition, we demonstrate improved generalization under practical constraints on sensor spatial- and temporal-resolution. We believe our method is a promising direction as single-photon lidars become ubiquitous on consumer devices, such as phones, tablets, and headsets. |
| title | PlatoNeRF: 3D Reconstruction in Plato's Cave via Single-View Two-Bounce Lidar |
| topic | Computer Vision and Pattern Recognition Image and Video Processing |
| url | https://arxiv.org/abs/2312.14239 |