arXiv Computer Vision

FlashNormal: Detailed Surface Normal Estimation from Flash and No-Flash Images

FlashNormal is a diffusion-based method that estimates detailed surface normals from flash/no-flash image pairs, leveraging flash-induced shading variations and a curvature-guided detail enhancement strategy to improve surface detail recovery and reduce shape‑reflectance ambiguity. The approach is designed for practical use on modern smartphones and is evaluated on EvalFlash, a new real‑world dataset of 20 objects with ground‑truth normals. Experiments show FlashNormal outperforms existing single‑image methods and surpasses prior flash/no‑flash normal estimation techniques on EvalFlash.

Hugging Face Trending Papers
3d ago

Casual Flash Lighting for Gaussian Splat Inverse Rendering

The paper introduces a method that combines casual indoor photographs taken with and without flash to recover geometry, materials, and lighting. By using flash residuals to constrain albedo and BRDF and static lighting to capture specular highlights, the approach employs a hash‑encoded MLP anchored to a 2DGS depth map for view‑consistent material decomposition. Experiments on synthetic and real scenes show improved diffuse color, albedo, roughness, and relighting performance, achieving a 4.17 dB PSNR gain over the best baseline.

arXiv Computer Vision
Aug 21

Point-Based 3D Reconstruction from Sparse Views under Known Illumination

arXiv:2608. 20000v1 Announce Type: new Abstract: Sparse view 3D reconstruction is commonly addressed with neural implicit surfaces or dense point-based representations such as Gaussian splatting.

By Magnus Kaufmann Gjerde, Joakim Bruslund Haurum, Jeppe Revall Frisvad, Markus Worchel, J. Andreas B{\ae}rentzen, Thomas B. Moeslund
arXiv Computer Vision
Sep 24

GLOW: Global Illumination-Aware Inverse Rendering of Indoor Scenes Captured with Dynamic Co-Located Light & Camera

GLOW is a Global Illumination‑aware inverse rendering framework for indoor scenes captured with dynamic co‑located light and camera setups. It combines a neural implicit surface representation with a neural radiance cache to jointly optimize geometry and reflectance, while introducing a dynamic radiance cache and a surface‑angle‑weighted radiometric loss to handle near‑field motion, strong inter‑reflections, and specular highlights. Experiments demonstrate that GLOW significantly outperforms prior methods in estimating material reflectance under both natural and co‑located illumination.

By Jiaye Wu, Saeed Hadadan, Geng Lin, Peihan Tu, Auguste Gezalyan, Matthias Zwicker, David Jacobs, Roni Sengupta