【点云系列】Relationship-based Point Cloud Completion

本文探讨了一种针对多物体组合场景中部分点云补全的方法,强调了两个相邻物体的空间关系在补全过程中的作用。采用两路网络架构和一致性损失函数来优化补全效果,并在Interactioncontext数据集上进行了实验。实验结果表明,考虑空间关系的补全方法在鲁棒性和准确性上有所提升。此外,还分析了多种用于捕获和利用空间关系的技术,如图网络和高斯分布表示。

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1. 概要

TVCG 2021 期刊,点云补全
论文地址:https://ieeexplore.ieee.org/abstract/document/9528986

2. 动机

针对多物体组合的场景中的 部分补全
关注在:两个物体是否在场景当中空间临近
如图所示:也就是两个空间相近的物体互相参考补全
在这里插入图片描述

3. 方法

问题定义:

给定一个分割后的部分点云,包含两个部分,分别属于不同的物体
目标:补全每个部分

假定:假定 输入是由一次扫描获取到的,这比从多个方向获取的场景更加的具有挑战性。理论来讲,我们的方法也可以用到多方向扫描的构建。

两路网络:

为什么是两路网络呢:其实就是因为两个可能残缺的物体 O a O_a Oa O b O_b O

### Geomagic Point Cloud Surface Reconstruction Tutorial In the realm of computer graphics and reverse engineering, reconstructing surfaces from point clouds is a critical task. Utilizing software like Geomagic provides powerful tools to achieve this goal efficiently. #### Preparation Before Reconstructing Surfaces with Geomagic Before starting the process of surface reconstruction using Geomagic, ensure that the input data (point cloud) has been preprocessed properly. This includes cleaning up noise points, aligning multiple scans into one coordinate system, and ensuring sufficient density within regions where detailed geometry needs accurate representation[^1]. #### Importing Data Into Geomagic To begin working on point cloud datasets inside Geomagic: - Launch Geomagic application. - Use `File -> Open` or drag-and-drop functionality to load your point cloud file(s). Supported formats include .xyz, .asc, .pts among others depending upon version specifics. Once imported successfully, users can visually inspect their dataset through various viewing modes provided by Geomagic's interface. #### Performing Initial Processing Steps After loading the raw scan data as a point set object in Geomagic: - Apply filters such as smoothing or outlier removal if necessary based on quality assessment during importation phase. - If dealing with multi-scan projects, perform alignment operations between different sets before proceeding further towards mesh generation tasks. These preparatory actions help improve final output accuracy when generating meshes later down the pipeline. #### Generating Meshes From Point Clouds Using Automated Tools Within Geomagic For automatic creation of watertight manifold triangle meshes directly out of dense unorganized 3D coordinates without explicit boundary definition required beforehand: - Select all relevant parts/regions containing desired features intended for conversion into solid models. - Navigate menu options until reaching commands associated specifically with "Wrap Points" feature which automatically constructs polygonal approximations around selected areas while maintaining topological consistency throughout entire structure being processed at once time interval per iteration cycle executed internally under hood seamlessly behind scenes transparently invisible externally visible only via progress bar updates shown periodically over status area located bottom portion main window layout design arrangement setup 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