Active stereo technique using single pattern projection, a.k.a. one-shot 3D
scan, have drawn a wide attention from industry, medical purposes, etc. One
severe drawback of one-shot 3D scan is sparse reconstruction. In addition,
since spatial pattern becomes complicated for the purpose of efficient
embedding, it is easily affected by noise, which results in unstable decoding.
To solve the problems, we propose a pixel-wise interpolation technique for
one-shot scan, which is applicable to any types of static pattern if the
pattern is regular and periodic. This is achieved by U-net which is pre-trained
by CG with efficient data augmentation algorithm. In the paper, to further
overcome the decoding instability, we propose a robust correspondence finding
algorithm based on Markov random field (MRF) optimization. We also propose a
shape refinement algorithm based on b-spline and Gaussian kernel interpolation
using explicitly detected laser curves. Experiments are conducted to show the
effectiveness of the proposed method using real data with strong noises and
textures.

采用单幅投影的主动立体视觉技术，也称为一次性三维扫描，已经引起了产业、医学等领域的广泛关注。然而，一次性三维扫描存在稀疏重建的严重缺陷，并且由于空间模式的复杂性，在嵌入效率方面容易受到噪声的影响，从而导致解码不稳定。为了解决这些问题，我们提出了一种适用于任何类型的静态模式的像素级插值技术，只要该模式是规则且周期性的。通过使用经过高效数据增强算法预训练的 U-net，我们实现了这一目标。在本文中，为了进一步解决解码不稳定性问题，我们提出了一种基于马尔科夫随机场（MRF）优化的鲁棒对应点查找算法。我们还提出了一种基于 b 样条和高斯核插值的形状细化算法，使用明确检测到的激光曲线。实验证明了所提方法在强噪声和纹理实际数据上的有效性。