DD-GCN: Directed Diffusion Graph Convolutional Network for Skeleton-based Human Action Recognition

• URL: http://arxiv.org/abs/2308.12501v1
• Date: Thu, 24 Aug 2023 01:53:59 GMT
• Title: DD-GCN: Directed Diffusion Graph Convolutional Network for Skeleton-based Human Action Recognition
• Authors: Chang Li, Qian Huang, Yingchi Mao
• Abstract summary: Graphal Networks (GCNs) have been widely used in skeleton-based human action recognition. In this paper, we construct directed diffusion for action modeling and introduce the activity partition strategy. We also present to embed synchronized-temporal-temporal semantics.
• Score: 10.115283931959855
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Graph Convolutional Networks (GCNs) have been widely used in skeleton-based human action recognition. In GCN-based methods, the spatio-temporal graph is fundamental for capturing motion patterns. However, existing approaches ignore the physical dependency and synchronized spatio-temporal correlations between joints, which limits the representation capability of GCNs. To solve these problems, we construct the directed diffusion graph for action modeling and introduce the activity partition strategy to optimize the weight sharing mechanism of graph convolution kernels. In addition, we present the spatio-temporal synchronization encoder to embed synchronized spatio-temporal semantics. Finally, we propose Directed Diffusion Graph Convolutional Network (DD-GCN) for action recognition, and the experiments on three public datasets: NTU-RGB+D, NTU-RGB+D 120, and NW-UCLA, demonstrate the state-of-the-art performance of our method.

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