PMNI: Pose-free Multi-view Normal Integration for Reflective and Textureless Surface Reconstruction

Reflective and textureless surfaces remain a challenge in multi-view 3D reconstruction. Both camera pose calibration and shape reconstruction often fail due to insufficient or unreliable cross-view visual features. To address these issues, we present PMNI (Pose-free Multi-view Normal Integration), a neural surface reconstruction method that incorporates rich geometric information by leveraging surface normal maps instead of RGB images. By enforcing geometric constraints from surface normals and multi-view shape consistency within a neural signed distance function (SDF) optimization framework, PMNI simultaneously recovers accurate camera poses and high-fidelity surface geometry. Experimental results on synthetic and real-world datasets show that our method achieves state-of-the-art performance in the reconstruction of reflective surfaces, even without reliable initial camera poses.

@article{pei2025_2504.08410,
  title={ PMNI: Pose-free Multi-view Normal Integration for Reflective and Textureless Surface Reconstruction },
  author={ Mingzhi Pei and Xu Cao and Xiangyi Wang and Heng Guo and Zhanyu Ma },
  journal={arXiv preprint arXiv:2504.08410},
  year={ 2025 }
}