计算机与现代化 ›› 2023, Vol. 0 ›› Issue (12): 24-29.doi: 10.3969/j.issn.1006-2475.2023.12.005

• 算法设计与分析 • 上一篇    下一篇

基于多阶段分形组合的点云补全算法

  

  1. (广东工业大学计算机学院,广东 广州 510006)
  • 出版日期:2023-12-24 发布日期:2024-01-24
  • 作者简介:曾伟平(1997—),男,江西吉安人,硕士研究生,研究方向:机器视觉,深度学习,E-mail: 2295859040@qq.com; 通信作者:陈俊洪(1995—),男,广东普宁人,博士研究生,研究方向:人机协作,深度学习,E-mail: CSChenjunhong@hotmail.com; Muhammad Asim(1989—),男,巴基斯坦白沙瓦人,博士研究生,研究方向:边缘计算,E-mail: asimpk@gdut.edu.cn; 刘文印(1966—),男,吉林榆树人,教授,博士生导师,研究方向:网络身份安全,假冒网站监测,机器视觉,图形识别,文本挖掘,E-mail: liuwy@gdut.edu.cn; 杨振国(1988—),男,山东潍坊人,副教授,博士,研究方向:机器学习,多模态融合,舆情分析,E-mail: yzg@gdut.edu.cn。
  • 基金资助:
    国家自然科学基金资助项目(91748107, 62076073, 61902077); 广东省引进创新科研团队计划项目(2014ZT05G157);广东省基础与应用基础研究基金资助项目(2020A1515010616); 广东省科技创新战略专项资金资助项目(pdjh2020a0173)

Point Cloud Completion Algorithm Based on Multi-stage Fractal Combination

  1. (School of Computer Science and Technology, Guangdong University of Technology, Guangzhou 510006, China)
  • Online:2023-12-24 Published:2024-01-24

摘要: 摘要:点云是一种常见的三维物体表示形式,然而由于传感器设计和精度等原因,得到的点云通常存在几何形状缺失和稀疏性缺失。为了解决该问题,本文提出一种基于多阶段分形组合的点云补全算法。第一阶段先对输入点云进行多次采样并且分别提取特征,再利用金字塔模型生成多尺度几何形状丢失的点云,最后将生成点云与输入点云进行拼接。第二阶段利用KNN聚类和PointNet堆叠网络提取局部特征,并且将拼接的点云下采样作为粗略预测,最后将粗略预测与局部输入折叠网络生成精细化的高质量点云。本文算法基于局部到整体多阶段进行补全,损失函数可针对不同阶段进行权重调整,有效地优化了补全过程,并且在ShapeNet数据集上获得不错的补全效果。

关键词: 关键词:点云补全, 多阶段, 分形组合, 几何形状缺失, 稀疏性缺失

Abstract: Abstract: Point cloud is a common representation of 3D objects. However, due to reasons such as sensor design and precision, the obtained point cloud usually has missing geometry and sparseness. To solve this problem, this paper proposes a point cloud completion algorithm based on multi-stage fractal combination. In the first stage, the input point cloud is sampled multiple times and features are extracted separately, then the pyramid model is used to generate a point cloud with multi-scale geometry loss, and finally, the generated point cloud is spliced with the input point cloud. In the second stage, KNN clustering and PointNet stacking network are used to extract local features, and the spliced point cloud is down-sampled as a rough prediction, and finally, the rough prediction is combined with the local input folding network to generate a refined high-quality point cloud. This algorithm is based on local to overall multi-stage completion, and the loss function can be adjusted for different stages, which effectively optimizes the completion process and achieves good completion results in the ShapeNet dataset.

Key words: Key words: point cloud completion, multi-stage, fractal combination, missing geometry, missing sparsity

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