拡散反射成分推定による分光反射係数計測精度向上に関する研究

抄録

Specular reflection on the surface of target material causes huge error in the measured spectral reflectance. It is important to eliminate the specular reflection components for estimation of the diffuse reflection components that shows the true spectral characteristics.
Today, a study about separating specular and diffuse reflection components has been vigorously conducted in the field of computer vision and the computer graphics. Various methods have been proposed to separate these two components using the polarizing filters and so on. But this method should install the polarizing filters in the instruments to polarize the incident light. Therefore, this method is not suitable to use for a spectral measurements because the optical characteristic is changed.
In this paper, we propose a novel method based on dichromatic reflection model with multiple viewing angle reflection data to estimate the diffuse reflection components from the measured spectral reflectance data of the material surface with luster such as leaves of plant and plastics without any additional filters and instruments. Finally, an experiment using a color sample sheet is executed for demonstrating the feasibility of the proposed method.