Dynamic sensor data segmentation for real-time knowledge-driven activity recognition

Research output: Contribution to journalArticle

Abstract

Approaches and algorithms for activity recognition have recently made substantial progress due to advancements in pervasive and mobile computing, smart environments and ambient assisted living. Nevertheless, it is still difficult to achieve real-time continuous activity recognition as sensor data segmentation remains a challenge. This paper presents a novel approach to real-time sensor data segmentation for continuous activity recognition. Central to the approach is a dynamic segmentation model, based on the notion of varied time windows, which can shrink and expand the segmentation window size by using temporal information of sensor data and activities as well as the state of activity recognition. The paper first analyzes the characteristics of activities of daily living from which the segmentation model that is applicable to a wide range of activity recognition scenarios is motivated and developed. It then describes the working mechanism and relevant algorithms of the model in the context of knowledge-driven activity recognition based on ontologies. The presented approach has been implemented in a prototype system and evaluated in a number of experiments. Results have shown average recognition accuracy above 83% in all experiments for real time activity recognition, which proves the approach and the underlying model.
LanguageEnglish
Pages155-172
JournalPervasive and Mobile Computing
Volume10
Issue numberPart B
Early online date3 Dec 2012
DOIs
Publication statusPublished - Feb 2014

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Activity Recognition
Segmentation
Real-time
Sensor
Sensors
Mobile computing
Ubiquitous computing
Ontology
Ambient Assisted Living
Experiments
Smart Environments
Pervasive Computing
Mobile Computing
Time Windows
Knowledge
Expand
Experiment
Model
Prototype
Model-based

Cite this

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Dynamic sensor data segmentation for real-time knowledge-driven activity recognition. / Okeyo, George; Chen, Liming; Wang, Hui; Sterritt, Roy.

Vol. 10, No. Part B, 02.2014, p. 155-172.

Research output: Contribution to journalArticle

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