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arXiv · 2412.05179

Spatially-Adaptive Hash Encodings For Neural Surface Reconstruction

Thomas Walker·Octave Mariotti·Amir Vaxman·Hakan Bilen
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Abstract

Positional encodings are a common component of neural scene reconstruction methods, and provide a way to bias the learning of neural fields towards coarser or finer representations. Current neural surface reconstruction methods use a "one-size-fits-all" approach to encoding, choosing a fixed set of encoding functions, and therefore bias, across all scenes. Current state-of-the-art surface reconstruction approaches leverage grid-based multi-resolution hash encoding in order to recover high-detail geometry. We propose a learned approach which allows the network to choose its encoding basis as a function of space, by masking the contribution of features stored at separate grid resolutions. The resulting spatially adaptive approach allows the network to fit a wider range of frequencies without introducing noise. We test our approach on standard benchmark surface reconstruction datasets and achieve state-of-the-art performance on two benchmark datasets.

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Thomas Walker, Octave Mariotti, Amir Vaxman, Hakan Bilen. 2024-12-06. Spatially-Adaptive Hash Encodings For Neural Surface Reconstruction. https://arxiv.org/abs/2412.05179

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