Projects | GLoSH: Global-Local Spherical Harmonics for Intrinsic Image Decomposition

ICCV 2019 | Traditional intrinsic image decomposition focuses on decomposing images into reflectance and shading, leaving surface normals and lighting entangled in shading. In this work, we propose a global-local spherical harmonics (GLoSH) lighting model to improve the lighting component and jointly predict reflectance and surface normals. The global SH model the holistic lighting, while the local SH account for the spatial variation of lighting. A novel non-negative lighting constraint is also proposed to encourage the estimated SH to be physically meaningful.