arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2006.02598cs.CVcs.LGeess.IV
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Info3D:基于互信息最大化和对比学习的三维物体表示学习

Info3D: Representation Learning on 3D Objects using Mutual Information Maximization and Contrastive Learning

Autodesk AI Lab(Autodesk AI 实验室)

Aditya Sanghi

摘要:

计算机视觉的一个主要任务是从三维数据中表示、理解和提取结构。为了实现这一目标,无监督学习是一个强大而必要的工具。目前用于3D形状分析的大多数无监督方法使用对齐的数据集,需要重建对象,并且在下游任务上性能恶化。为了解决这些问题,我们建议扩展InfoMax和3D形状的对比学习原则。我们表明,我们可以最大限度地提高3D对象和他们的“块”之间的互信息,以改善对齐数据集的表示。此外,我们可以通过最大化3D对象与其几何变换版本之间的互信息来实现SO ${(3)}$群中的旋转不变性。最后,我们进行了聚类、迁移学习、形状检索等实验,取得了较好的效果。

英文摘要:

A major endeavor of computer vision is to represent, understand and extract structure from 3D data. Towards this goal, unsupervised learning is a powerful and necessary tool. Most current unsupervised methods for 3D shape analysis use datasets that are aligned, require objects to be reconstructed and suffer from deteriorated performance on downstream tasks. To solve these issues, we propose to extend the InfoMax and contrastive learning principles on 3D shapes. We show that we can maximize the mutual information between 3D objects and their "chunks" to improve the representations in aligned datasets. Furthermore, we can achieve rotation invariance in SO${(3)}$ group by maximizing the mutual information between the 3D objects and their geometric transformed versions. Finally, we conduct several experiments such as clustering, transfer learning, shape retrieval, and achieve state of art results.

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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