“#photometric-stereo with general, unknown lighting”, from 2006. Simple optimization using #spherical-harmonics in low-dimensional space.
on 02015-08-10A #DSP framework for light reflection for #3D reconstruction (“inverse #rendering”) and #BRDF (bidirectional reflectance distribution function) estimation using #spherical-harmonics. Aka #photometric-stereo. #toread
on 02015-08-10