no code implementations • 10 Nov 2023 • Fotios Logothetis, Ignas Budvytis, Roberto Cipolla
As in recent neural multi-view shape estimation frameworks such as NeRF, SIREN and inverse graphics approaches to multi-view photometric stereo (e. g. PS-NeRF) we formulate shape estimation task as learning of a differentiable surface and texture representation by minimising surface normal discrepancy for normals estimated from multiple varying light images for two views as well as discrepancy between rendered surface intensity and observed images.
no code implementations • 10 Oct 2022 • Fotios Logothetis, Roberto Mecca, Ignas Budvytis, Roberto Cipolla
Reconstructing the 3D shape of an object using several images under different light sources is a very challenging task, especially when realistic assumptions such as light propagation and attenuation, perspective viewing geometry and specular light reflection are considered.
no code implementations • 27 Apr 2021 • Roberto Mecca, Fotios Logothetis, Ignas Budvytis, Roberto Cipolla
In order to fill the gap in evaluating near-field photometric stereo methods, we introduce LUCES the first real-world 'dataset for near-fieLd point light soUrCe photomEtric Stereo' of 14 objects of a varying of materials.
no code implementations • 12 Sep 2020 • Fotios Logothetis, Ignas Budvytis, Roberto Mecca, Roberto Cipolla
Secondly, we compute the depth by integrating the normal field in order to iteratively estimate light directions and attenuation which is used to compensate the input images to compute reflectance samples for the next iteration.
no code implementations • ICCV 2021 • Fotios Logothetis, Ignas Budvytis, Roberto Mecca, Roberto Cipolla
We show that global physical effects can be approximated on the observation map domain and this simplifies and speeds up the data creation procedure.
no code implementations • ICCV 2019 • Fotios Logothetis, Roberto Mecca, Roberto Cipolla
In this work, we present a volumetric approach to the multi-view photometric stereo problem.
no code implementations • CVPR 2017 • Fotios Logothetis, Roberto Mecca, Roberto Cipolla
3D reconstruction from shading information through Photometric Stereo is considered a very challenging problem in Computer Vision.