In skeleton-based action recognition, graph convolutional networks (GCNs), which model human body skeletons using graphical components such as nodes and connections, have achieved remarkable performance recently. However, current state-of-the-art methods for skeleton-based action recognition usually work on the assumption that the completely observed skeletons will be provided. This may be problematic to apply this assumption in real scenarios since there is always a possibility that captured skeletons are incomplete or noisy. In this work, we propose a skeleton-based action recognition method which is robust to noise information of given skeleton features. The key insight of our approach is to train a model by maximizing the mutual information between normal and noisy skeletons using a predictive coding manner. We have conducted comprehensive experiments about skeleton-based action recognition with defected skeletons using NTU-RGB+D and Kinetics-Skeleton datasets. The experimental results demonstrate that our approach achieves outstanding performance when skeleton samples are noised compared with existing state-of-the-art methods.

本研究提出了一种骨架动作识别方法，该方法对给定骨架特征的噪声信息具有鲁棒性，通过最大化正常和噪声骨架之间的互信息以预测编码方式来训练模型，并在NTU-RGB + D和Kinetics-Skeleton数据集上进行了综合实验，结果表明该方法具有明显的性能优势。

基于预测编码的图卷积网络用于噪声鲁棒的基于骨架的动作识别