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DHA-eGCN: Differential Hyperedge Attention-Enhanced Graph Convolution Network for Skeleton-Based Human Action

Oskar Ika Adi Nugroho1, Wen-Nung Lie1

  • 1Department of Electrical Engineering and Advanced Institute of Manufacturing with High-Tech Innovations (AIM-HI), National Chung Cheng University, Chia-Yi 621, Taiwan.

Sensors (Basel, Switzerland)
|June 26, 2026
PubMed
Summary
This summary is machine-generated.

This study introduces a new model for human action recognition using skeleton data. The Differential Hyperedge Attention-enhanced GCN (DHA-eGCN) improves accuracy by better understanding body structure and motion, outperforming existing methods.

Keywords:
NTU RGB+Ddifferential attentionensemble learninggraph convolution networkhuman action recognitionhyperedgenorthwestern-UCLAskeleton sequence

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Area of Science:

  • Computer Vision
  • Artificial Intelligence
  • Machine Learning

Background:

  • Skeleton-based human action recognition (HAR) faces challenges in preserving body structure and capturing long-range dependencies, especially with noisy data.
  • Traditional Graph Convolutional Networks (GCNs) excel at local information but struggle with global interactions.
  • Attention mechanisms capture global patterns but can be misled by spurious correlations without strong skeletal constraints.

Purpose of the Study:

  • To develop a hybrid architecture that effectively integrates local structural information with global spatiotemporal dependencies for HAR.
  • To enhance the robustness and accuracy of skeleton-based HAR models, particularly under challenging conditions like incomplete or noisy joint data.

Main Methods:

  • Proposes Differential Hyperedge Attention-enhanced GCN (DHA-eGCN), a hybrid model combining differential hyperedge attention with multi-scale temporal convolution.
  • DHA injects skeletal structure using hop-distance relative positional encoding and hyperedge context tokens, employing differential attention to reduce noise.
  • Incorporates an explicit GCN branch for spatial grounding and an ensemble strategy for improved prediction robustness.

Main Results:

  • DHA-eGCN achieves state-of-the-art or competitive performance across multiple benchmark datasets (NTU RGB+D 60/120, Northwestern-UCLA).
  • Achieved high accuracy rates: 93.7% (NTU RGB+D 60 X-Sub), 97.0% (NTU RGB+D 60 X-View), 90.9% (NTU RGB+D 120 X-Sub), 91.9% (NTU RGB+D 120 X-Set), and 97.6% (Northwestern-UCLA).
  • Demonstrates consistent outperformance compared to strong graph-based, transformer-based, and hybrid methods.

Conclusions:

  • DHA-eGCN offers a superior approach to skeleton-based HAR by effectively fusing structural information and spatiotemporal dependencies.
  • The hybrid architecture and proposed attention mechanism significantly enhance model accuracy and robustness.
  • The model represents a significant advancement in recognizing human actions from skeletal sequences.