Presentation
Efficient Object Reconstruction with Differentiable Area Light Shading
DescriptionIn 3D object reconstruction from photographs, estimating material properties is challenging. We propose an inverse rendering method that uses active area lighting: as this provides a wider range of lighting angles per photo than point lighting, material reconstruction can be more accurate for the same number of photos. We compare area light shading with point lighting. With either mesh or 3D Gaussian splatting pipelines, area lighting can improve BRDF reconstruction and leads to a relighting PSNR improvement of 3 dB, or alternatively needs 1/5 of the input photos for the same quality as with point lights. We also compare area light shading with Monte Carlo ray tracing and with differential linearly transformed cosines (LTC) plus shadow visibility weighting. LTC can be faster, improving optimization times by 25%. In end-to-end method-level comparisons, our approach improves material reconstruction over SOTA methods, particularly for material roughness, leading to superior relighting quality.
Authors
Event Type
Technical Papers
TimeTuesday, 16 December 20253:11pm - 3:22pm HKT
LocationMeeting Room S426+S427, Level 4
