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arXiv 2407.01945cs.CV
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使用未知相机-投影仪对进行室内3D重建

Indoor 3D Reconstruction with an Unknown Camera-Projector Pair

National Engineering Laboratory for Integrated Aero-Space-Ground-Ocean Big Data Application Technology(空天地海一体化大数据应用技术国家工程实验室);College of Computer Science, Northwestern Polytechnical University(西北工业大学计算机学院)

Zhaoshuai Qi, Yifeng Hao, Rui Hu, Wenyou Chang, Jiaqi Yang, Yanning Zhang

AI总结:

针对未知相机-投影仪对仅两视图且无已知物体时的标定难题,提出利用未知长方体角点约束并将内参估计化为单变量优化,实现可靠标定与直接室内3D重建。

摘要:

基于结构光、采用相机-投影仪对(CPP)的方法在室内3D重建中发挥着重要作用,尤其适用于弱纹理场景。以往方法通常假设内参已知,这些内参要么通过已知物体预先标定,要么从多视图观测中自标定。在没有任何已知物体的情况下,仅从两个视图可靠恢复CPP内参仍然具有挑战性。本文提出了一种简单而可靠的解决方案。我们首次证明,可以从未知的长方体角点(C2,例如房间的角落,这是室内场景中的常见结构)获得关于CPP内参的充分约束。此外,仅需已知相机主点,即可将所有CPP内参的复杂多变量估计简化为简单的单变量优化问题,从而实现可靠标定,并因此使用未知CPP直接进行3D重建。大量结果表明,所提方法优于传统方法和基于学习的同类方法。此外,所提方法在解决无主动照明的类似任务方面也展现出可观潜力,例如稀疏视图运动恢复结构。

英文摘要:

Structured light-based method with a camera-projector pair (CPP) plays a vital role in indoor 3D reconstruction, especially for scenes with weak textures. Previous methods usually assume known intrinsics, which are pre-calibrated from known objects, or self-calibrated from multi-view observations. It is still challenging to reliably recover CPP intrinsics from only two views without any known objects. In this paper, we provide a simple yet reliable solution. We demonstrate that, for the first time, sufficient constraints on CPP intrinsics can be derived from an unknown cuboid corner (C2), e.g. a room's corner, which is a common structure in indoor scenes. In addition, with only known camera principal point, the complex multi-variable estimation of all CPP intrinsics can be simplified to a simple univariable optimization problem, leading to reliable calibration and thus direct 3D reconstruction with unknown CPP. Extensive results have demonstrated the superiority of the proposed method over both traditional and learning-based counterparts. Furthermore, the proposed method also demonstrates impressive potential to solve similar tasks without active lighting, such as sparse-view structure from motion.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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