关键词: 三维模型重建, 可见外壳, 交叉轮廓

Abstract: In this paper, a new approach for fast 3D model generation from silhouettes was proposed, in which the traditional 3D cones intersection problem was converted to the 2D silhouettes intersection problem. Firstly, the 2D silhouettes of different viewpoints were projected back to parallel 3D planes, then the intersectional silhouettes of all back-projections on the 3D plane were calculated, finally the corresponding points between the intersectional silhouettes of two neighboring 3D planes were matched, so the mesh of 3D model was directly obtained. Both theoretical analysis and experimental results show that the time complexity of the proposed algorithm is increased linearly with the number of viewpoints. Since the proposed method mainly improves the accuracy of 3D model by increasing the number of viewpoints, it makes out the precise generation of 3D models faster than the 3D cones intersection method.

Key words: 3D model generation, visual hull, intersectional silhouette