Reconstruction an object's shape from its appearance manifold under moving light (コンピュータビジョンとイメージメディア)

概要

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This paper presents a technique for recovering the shape of an object from its appearance manifold composed of a set of images that can be taken from a fixed viewpoint camera under a moving light source. We assume the distant illumination, a convex object shape and the variations of the object's appearance under a moving light are caused by the difference in the surface normals. These input images give an appearance manifold and a dimensionality reduction technique called 'Isomap' can recover the embedding three-dimensional surface normals of the object from this appearance manifold. Furthermore, the boundary points are used as the reference points to transform the result three-dimensional vectors into the true distribution of the surface normals. The proposed method is available for a wide range of reflectance materials and is easy to implement. The only requirement for our method is to take the different images of an object under different lighting directions.
一般社団法人情報処理学会の論文
2007-03-19