3D shape measurements using image scanner with multiple white light sources

In this paper, we propose a 3D shape measurement method using an image scanner which has multiple white light sources. Since the reflectance intensity depends on the object shape and color (albedo), the object shape should be estimated with the albedo simultaneously. Here, we propose two algorithms to estimate the object shape and albedo, and discuss the effectiveness of these algorithms by the shape measurement experiments using the synthetic images. In result, the method which iterates the shape estimation using the formulations eliminating the albedo parameters and the albedo estimation by the photometric models can reconstruct the object shape accurately even if the albedo parameters are completely unknown.