In this research, the authors have developed a compact and fast measurement system for three-dimensional (3D) shape, normal vector, and bidirectional reflectance distribution function (BRDF) of a 3D object, e.g., a human face. Since the proposed system uses linear light sources and a luminous intensity distribution of these light sources, the BRDF can be measured for a short time and without large measurement space. The proposed system is evaluated by two methods whereby the authors confirmed its accuracy: by measuring sample known objects and by comparing actual and reproduced images.
Takao Makino, Koichi Takase, Ryusuke Homma, Nobutoshi Ojima, Norimichi Tsumura, Toshiya Nakaguchi, Yoichi Miyake, "Development of Measurement System for Facial Physical Properties with Short-Distance Lighting" in Journal of Imaging Science and Technology, 2009, pp 60501-1 - 60501-9, https://doi.org/10.2352/J.ImagingSci.Technol.2009.53.6.060501