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arXiv 2409.09714cs.CV
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基于野外大规模手部图像对比学习的3D手部姿态估计预训练

Pre-Training for 3D Hand Pose Estimation with Contrastive Learning on Large-Scale Hand Images in the Wild

Nie Lin, Takehiko Ohkawa, Mingfang Zhang, Yifei Huang, Ryosuke Furuta, Yoichi Sato

AI总结:

针对3D手部姿态预训练未充分利用野外手部图像的问题,提出名为HandCLR的对比学习框架,用200万+野外手部图像训练相似姿态对嵌入,在多个数据集上取得SOTA级提升。

摘要:

我们提出了一种基于野外手部图像的对比学习框架,专门用于3D手部姿态估计器的预训练,名为HandCLR。在大规模图像上进行预训练在各类任务中已取得可观成效,但此前的3D手部姿态预训练方法尚未充分挖掘从野外视频中获取的多样化手部图像的潜力。为实现可扩展的预训练,我们首先从野外视频中构建了一个规模庞大的手部图像库,并采用对比学习设计了我们的方法。具体而言,我们从近期的以人为中心的视频(如100DOH和Ego4D)中收集了超过200万张手部图像。为从这些图像中提取判别性信息,我们聚焦于手部的相似性——即来自不同样本的相似手部姿态对,并提出了一种新颖的对比学习方法,该方法可将相似的手部对在潜在空间中嵌入得更近。我们的实验表明,该方法的性能优于仅通过数据增强从单张图像生成正样本对的传统对比学习方法。我们在多个数据集上相比当前最优方法实现了显著提升,在FreiHand上提升15%,在DexYCB上提升10%,在AssemblyHands上提升4%。

英文摘要:

We present a contrastive learning framework based on in-the-wild hand images tailored for pre-training 3D hand pose estimators, dubbed HandCLR. Pre-training on large-scale images achieves promising results in various tasks, but prior 3D hand pose pre-training methods have not fully utilized the potential of diverse hand images accessible from in-the-wild videos. To facilitate scalable pre-training, we first prepare an extensive pool of hand images from in-the-wild videos and design our method with contrastive learning. Specifically, we collected over 2.0M hand images from recent human-centric videos, such as 100DOH and Ego4D. To extract discriminative information from these images, we focus on the similarity of hands; pairs of similar hand poses originating from different samples, and propose a novel contrastive learning method that embeds similar hand pairs closer in the latent space. Our experiments demonstrate that our method outperforms conventional contrastive learning approaches that produce positive pairs sorely from a single image with data augmentation. We achieve significant improvements over the state-of-the-art method in various datasets, with gains of 15% on FreiHand, 10% on DexYCB, and 4% on AssemblyHands.

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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