A novel approach for computing exact visual hull from silhouettes

作者：Xia Dan; Li Dehua; Li Qingguang^*; Xu Shengyong

来源：Optik, 2011, 122(24): 2220-2226.

DOI：10.1016/j.ijleo.2011.02.013

• 3D reconstruction
• Visual hull
• Silhouette
• Line-based model
• Octree volume

Modeling from silhouettes is one of the main technologies for 3D reconstruction in computer vision. The existing methods are generally divided into two classes: volume-based approaches and surface-based approaches. The former are robust for complex objects but inaccurate, while the latter are accurate but time consuming and usually suffer from numerical instabilities. This paper proposes a novel method to compute exact visual hull by taking advantage of surface-based approaches while retaining the simplicity and robustness of volume-based approaches. To this aim, a line-based model is built for each cube on the edge of octree volume structure of object. Convex surface points of visual hull in line-based model are searched by the idea of surface-based approaches. Experiments with real data are conducted to test the efficiency and exactness of our method.

• 出版日期2011
• 单位华中科技大学