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Anti-Aliased Neural Implicit Surfaces with Encoding Level of Detail (arxiv.org)
2 points by PaulHoule on Sep 29, 2023 | hide | past | pdf | discuss on HN

In plain words: A 3D scene is stored as layers of flat feature grids, coarse to fine, so each ray gathers detail from a cone-shaped region and stays smooth when zoomed out. It rebuilt surfaces and rendered new views more accurately than earlier methods.

Abstract

We present LoD-NeuS, an efficient neural representation for high-frequency geometry detail recovery and anti-aliased novel view rendering. Drawing inspiration from voxel-based representations with the level of detail (LoD), we introduce a multi-scale tri-plane-based scene representation that is capable of capturing the LoD of the signed distance function (SDF) and the space radiance. Our representation aggregates space features from a multi-convolved featurization within a conical frustum along a ray and optimizes the LoD feature volume through differentiable rendering. Additionally, we propose an error-guided sampling strategy to guide the growth of the SDF during the optimization. Both qualitative and quantitative evaluations demonstrate that our method achieves superior surface reconstruction and photorealistic view synthesis compared to state-of-the-art approaches.

Yiyu Zhuang, Qi Zhang, Ying Feng, Hao Zhu, Yao Yao, Xiaoyu Li, Yan-Pei Cao, Ying Shan, Xun Cao
arXiv:2309.10336 · cs.CV, cs.GR · submitted Sep 19, 2023
abstract · pdf · html · Accept to SIGGRAPH Asia 2023 conference track

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