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| <h1 class="title is-1 publication-title">Towards Lifelong Dialogue Agents via Timeline-based Memory Management</h1> | |
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| <span class="author-block"> | |
| <a href="https://keunhong.com">Keunhong Park</a><sup>1</sup>,</span> | |
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| <a href="https://utkarshsinha.com">Utkarsh Sinha</a><sup>2</sup>,</span> | |
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| <a href="https://jonbarron.info">Jonathan T. Barron</a><sup>2</sup>, | |
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| <a href="http://sofienbouaziz.com">Sofien Bouaziz</a><sup>2</sup>, | |
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| <a href="https://www.danbgoldman.com">Dan B Goldman</a><sup>2</sup>, | |
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| <a href="https://homes.cs.washington.edu/~seitz/">Steven M. Seitz</a><sup>1,2</sup>, | |
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| <a href="http://www.ricardomartinbrualla.com">Ricardo Martin-Brualla</a><sup>2</sup> | |
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| <span class="author-block"><sup>1</sup>University of Washington,</span> | |
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| <h2 class="title is-3">Abstract</h2> | |
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| <p> | |
| We present the first method capable of photorealistically reconstructing a non-rigidly | |
| deforming scene using photos/videos captured casually from mobile phones. | |
| </p> | |
| <p> | |
| Our approach augments neural radiance fields | |
| (NeRF) by optimizing an | |
| additional continuous volumetric deformation field that warps each observed point into a | |
| canonical 5D NeRF. | |
| We observe that these NeRF-like deformation fields are prone to local minima, and | |
| propose a coarse-to-fine optimization method for coordinate-based models that allows for | |
| more robust optimization. | |
| By adapting principles from geometry processing and physical simulation to NeRF-like | |
| models, we propose an elastic regularization of the deformation field that further | |
| improves robustness. | |
| </p> | |
| <p> | |
| We show that <span class="dnerf">Nerfies</span> can turn casually captured selfie | |
| photos/videos into deformable NeRF | |
| models that allow for photorealistic renderings of the subject from arbitrary | |
| viewpoints, which we dub <i>"nerfies"</i>. We evaluate our method by collecting data | |
| using a | |
| rig with two mobile phones that take time-synchronized photos, yielding train/validation | |
| images of the same pose at different viewpoints. We show that our method faithfully | |
| reconstructs non-rigidly deforming scenes and reproduces unseen views with high | |
| fidelity. | |
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| <h2 class="title">BibTeX</h2> | |
| <pre><code>@article{park2021nerfies, | |
| author = {Park, Keunhong and Sinha, Utkarsh and Barron, Jonathan T. and Bouaziz, Sofien and Goldman, Dan B and Seitz, Steven M. and Martin-Brualla, Ricardo}, | |
| title = {Nerfies: Deformable Neural Radiance Fields}, | |
| journal = {ICCV}, | |
| year = {2021}, | |
| }</code></pre> | |
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