Attention-driven Body Pose Encoding for Human Activity Recognition

Research output: Chapter in Book/Report/Conference proceedingConference proceeding (ISBN)peer-review

Abstract

This article proposes a novel attention-based body pose encoding for human activity recognition. Most of the existing human activity recognition approaches based on 3D pose data often enrich the input data using additional handcrafted
representations such as velocity, super-normal vectors, pairwise relations, and so on. The enriched data complements the 3D body joint position data and improves model performance. In this paper, we propose a novel approach that learns enhanced feature representations from a given sequence of 3D body joints. To achieve this encoding, the approach exploits two body pose streams: 1) a spatial stream which encodes the spatial relationship between various body joints at each time point to learn spatial structure involving the spatial distribution of different body joints 2) a temporal stream that learns the temporal variation of individual body joints over the entire sequence duration
to present a temporally enhanced representation. Afterwards, these two pose streams are fused with a multi-head attention mechanism. We also capture the contextual information from the RGB video stream using a deep Convolutional Neural Network (CNN) model combined with a multi-head attention and a bidirectional Long Short-Term Memory (LSTM) network. Finally, the RGB video stream is combined with the fused body pose stream to give a novel end-to-end deep model for effective human activity recognition. The proposed model is evaluated on three datasets including the challenging NTU-RGBD dataset and
achieves state-of-the-art results.
Original languageEnglish
Title of host publication25th International Conference on Pattern Recognition (ICPR)
PublisherIEEE
Publication statusAccepted/In press - 22 Jun 2020

Keywords

  • Attention in Deep Learning
  • Human Activity Recognition
  • Deep Learning
  • Body Pose Encoding
  • Long short-term memory (LSTM)
  • Recurrent Neural Networks (RNNs)
  • Spatial Encoding Unit
  • Temporal Encoding Unit

Fingerprint Dive into the research topics of 'Attention-driven Body Pose Encoding for Human Activity Recognition'. Together they form a unique fingerprint.

Cite this