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STOP: Space-Time Occupancy Patterns for 3D Action Recognition from Depth Map Sequences

  • Antonio W. Vieira
  • Erickson R. Nascimento
  • Gabriel L. Oliveira
  • Zicheng Liu
  • Mario F. M. Campos
Part of the Lecture Notes in Computer Science book series (LNCS, volume 7441)

Abstract

This paper presents Space-Time Occupancy Patterns (STOP), a new visual representation for 3D action recognition from sequences of depth maps. In this new representation, space and time axes are divided into multiple segments to define a 4D grid for each depth map sequence. The advantage of STOP is that it preserves spatial and temporal contextual information between space-time cells while being flexible enough to accommodate intra-action variations. Our visual representation is validated with experiments on a public 3D human action dataset. For the challenging cross-subject test, we significantly improved the recognition accuracy from the previously reported 74.7% to 84.8%. Furthermore, we present an automatic segmentation and time alignment method for online recognition of depth sequences.

Keywords

Pattern recognition Machine Learning Human action 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Antonio W. Vieira
    • 1
    • 2
  • Erickson R. Nascimento
    • 1
  • Gabriel L. Oliveira
    • 1
  • Zicheng Liu
    • 3
  • Mario F. M. Campos
    • 1
  1. 1.DCC - Universidade Federal de Minas GeraisBelo HorizonteBrazil
  2. 2.CCET - UnimontesMontes ClarosBrazil
  3. 3.Microsoft ResearchRedmondUSA

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