English

OffsetOPT: Explicit Surface Reconstruction without Normals

Computer Vision and Pattern Recognition 2025-03-21 v1

Abstract

Neural surface reconstruction has been dominated by implicit representations with marching cubes for explicit surface extraction. However, those methods typically require high-quality normals for accurate reconstruction. We propose OffsetOPT, a method that reconstructs explicit surfaces directly from 3D point clouds and eliminates the need for point normals. The approach comprises two stages: first, we train a neural network to predict surface triangles based on local point geometry, given uniformly distributed training point clouds. Next, we apply the frozen network to reconstruct surfaces from unseen point clouds by optimizing a per-point offset to maximize the accuracy of triangle predictions. Compared to state-of-the-art methods, OffsetOPT not only excels at reconstructing overall surfaces but also significantly preserves sharp surface features. We demonstrate its accuracy on popular benchmarks, including small-scale shapes and large-scale open surfaces.

Keywords

Cite

@article{arxiv.2503.15763,
  title  = {OffsetOPT: Explicit Surface Reconstruction without Normals},
  author = {Huan Lei},
  journal= {arXiv preprint arXiv:2503.15763},
  year   = {2025}
}

Comments

Accepted to CVPR 2025