Inspecting specular lobe objects using four light sources. - Fredric Solomon; Katsushi Ikeuchi (ICRA, 1992)

An Illumination Planner for Lambertian polyhedral Objects. - Fredric Solomon; Katsushi Ikeuchi (ICRA, 1995)

Extracting the Shape and Roughness of Specular Lobe Objects Using Four Light Photometric Stereo. - Fredric Solomon; Katsushi Ikeuchi (IEEE Trans. Pattern Anal. Mach. Intell., 1996)