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arXiv 2103.02766cs.CV
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PC2WF:基于原始点云的三维线框重建

PC2WF: 3D Wireframe Reconstruction from Raw Point Clouds

ETH Zürich(苏黎世联邦理工学院)

Yujia Liu, Stefano D'Aronco, Konrad Schindler, Jan Dirk Wegner

摘要:

我们引入了PC2WF,这是第一个端到端可训练的深度网络架构,可以将3D点云转换为线框模型。该网络将从某个对象的表面采样的一组无序的3D点作为输入,并输出该对象的线框,即,由线段连接的一组稀疏的角点。恢复线框是一项具有挑战性的任务,其中顶点和边的数量对于每个实例都是不同的,并且先验未知。我们的架构逐步建立模型:它首先将点编码为特征向量。基于这些特征,它识别一个候选顶点池,然后将这些候选顶点修剪为最终的角顶点集并细化它们的位置。接下来,将角点与候选边缘的详尽集合相关联,再次修剪以获得最终的线框。所有步骤都是可训练的,错误可以通过整个序列反向传播。我们在一个公开的合成数据集上验证了所提出的模型,对于该数据集,地面实况线框是可访问的,以及在一个新的真实世界数据集上。我们的模型产生高质量的线框抽象,并优于几个基线。

英文摘要:

We introduce PC2WF, the first end-to-end trainable deep network architecture to convert a 3D point cloud into a wireframe model. The network takes as input an unordered set of 3D points sampled from the surface of some object, and outputs a wireframe of that object, i.e., a sparse set of corner points linked by line segments. Recovering the wireframe is a challenging task, where the numbers of both vertices and edges are different for every instance, and a-priori unknown. Our architecture gradually builds up the model: It starts by encoding the points into feature vectors. Based on those features, it identifies a pool of candidate vertices, then prunes those candidates to a final set of corner vertices and refines their locations. Next, the corners are linked with an exhaustive set of candidate edges, which is again pruned to obtain the final wireframe. All steps are trainable, and errors can be backpropagated through the entire sequence. We validate the proposed model on a publicly available synthetic dataset, for which the ground truth wireframes are accessible, as well as on a new real-world dataset. Our model produces wireframe abstractions of good quality and outperforms several baselines.

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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