One-shot three-dimensional measurement method with the color mapping of light direction
Hiroshi Ohno
Abstract
A one-shot three-dimensional measurement method of a material surface with a color mapping imaging system of the light direction extracted BRDF (bidirectional reflectance distribution function) is proposed here. The imaging system can measure light directions reflected from a material surface using a stripe pattern multicolor filter having a translational symmetry in one direction. Assuming that surface inclination angles are sufficiently small and that the surface has a flat peripheral boundary, a reconstruction method of a three-dimensional surface from light directions is derived theoretically on the basis of the geometrical optics. The method is experimentally validated using a round ridge fabricated on an aluminum flat plate.