First and Second Order Dynamics in a Hierarchical SOM system for Action Recognition

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Abstract

Human recognition of the actions of other humans is very efficient and is based on patterns of movements. Our theoretical starting point is that the dynamics of the joint movements is important to action categorization. On the basis of this theory, we present a novel action recognition system that employs a hierarchy of Self-Organizing Maps together with a custom supervised neural network that learns to categorize actions. The system preprocesses the input from a Kinect like 3D camera to exploit the information not only about joint positions, but also their first and second order dynamics. We evaluate our system in two experiments with publicly available datasets, and compare its performance to the performance with less sophisticated preprocessing of the input. The results show that including the dynamics of the actions improves the performance. We also apply an attention mechanism that focuses on the parts of the body that are the most involved in performing the actions.

Detaljer

Författare
Enheter & grupper
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Datorseende och robotik (autonoma system)
Originalspråkengelska
Sidor (från-till)574-585
TidskriftApplied Soft Computing
Volym59
StatusPublished - 2017 jun 4
PublikationskategoriForskning
Peer review utfördJa

Relaterad forskningsoutput

Gharaee, Z., 2018 mar 15, Lund: Lund University Cognitive Science. 166 s.

Forskningsoutput: AvhandlingDoktorsavhandling (sammanläggning)

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