轮廓的结构和运动

Kwan-Yee Kenneth Wong, R. Cipolla
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引用次数: 163

摘要

本文讨论了从轮廓中恢复结构和运动的问题。轮廓是轮廓生成器的投影,它依赖于视点,因此不容易提供运动估计中利用的点对应。以前的工作已经利用了由极缘切线引起的对应关系,并且在圆周运动(可旋转序列)的特殊情况下已经开发了一个成功的解决方案。然而,主要的缺点是(1)在以后的时间不能轻易地添加新的视图,(2)部分结构在圆周运动下总是不可见。在本文中,我们通过结合任意一般视图和仅使用轮廓估计相机姿势来克服上述问题。我们提出了一个完整而实用的系统,可以从2D未校准的轮廓中产生高质量的3D模型。由此得到的三维模型可以通过添加新的任意视图和估计它们的姿态来逐步改进。给出了在不同物体上的实验结果,证明了重建的质量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Structure and motion from silhouettes
This paper addresses the problem of recovering structure and motion from silhouettes. Silhouettes are projections of contour generators which are viewpoint dependent, and hence do not readily provide point correspondences for exploitation in motion estimation. Previous works have exploited correspondences induced by epipolar tangencies, and a successful solution has been developed in the special case of circular motion (turnable sequences). However, the main drawbacks are (1) new views cannot be added easily at a later time, and (2) part of the structure will always remain invisible under circular motion. In this paper we overcome the above problems by incorporating arbitrary general views and estimating the camera poses using silhouettes alone. We present a complete and practical system which produces high quality 3D models from 2D uncalibrated silhouettes. The 3D models thus obtained can be refined incrementally by adding new arbitrary views and estimating their poses. Experimental results on various objects are presented, demonstrating the quality of the reconstructions.
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