Spin Light Uncalibrated Photometric Stereo: An Unsupervised Approach for Recovering Surface Normals, Environment Light, and Reflectance under Complex Natural Illumination

Spin-UP, an unsupervised method, tackles the natural light uncalibrated photometric stereo (NaUPS) problem by leveraging a novel image capture setup, a reliable light initialization technique, and advanced light and material models to recover surface normals, environment light, and isotropic reflectance under complex natural illumination.