Digitization of Small Objects Including Their Reflectance Characteristics using Linear Light Sources

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  • 直線光源による質感を含めた微小物体のデジタルデータ化手法

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Many studies have been presented to reconstruct insect specimens’ three-dimensional shapes and texture maps. However, their surface reflectance have rarely been reconstructed. In this study, we propose a method for reconstructing 3D shapes and reflectance characteristics of insect specimens. We take multiviewpoints focus-bracket images of a sample under two linear lights and reconstruct the 3D model of the sample by using a multi-view stereo method. From the 3D model and a series of photographs, we obtain a one-dimensional reflectance response function at each point on the 3D model, and estimate diffuse color, specular color, and surface roughness at the point. To illustrate the feasibility of our method, we performed digitization of multiple insect specimens with specular reflectance on their surfaces.

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