LOF: identifying density-based local outliers
SIGMOD '00 Proceedings of the 2000 ACM SIGMOD international conference on Management of data
Dynamic Daily-Living Patterns and Association Analyses in Tele-Care Systems
ICDM '04 Proceedings of the Fourth IEEE International Conference on Data Mining
Extracting spatiotemporal human activity patterns in assisted living using a home sensor network
Proceedings of the 1st international conference on PErvasive Technologies Related to Assistive Environments
Behavior bounding: an efficient method for high-level behavior comparison
Journal of Artificial Intelligence Research
Behavior Analysis Based on Coordinates of Body Tags
AmI '09 Proceedings of the European Conference on Ambient Intelligence
An Event-Driven Approach to Activity Recognition in Ambient Assisted Living
AmI '09 Proceedings of the European Conference on Ambient Intelligence
Multi-agent smart environments
Journal of Ambient Intelligence and Smart Environments
Scalable recognition of daily activities with wearable sensors
LoCA'07 Proceedings of the 3rd international conference on Location-and context-awareness
An agent-based approach to care in independent living
AmI'10 Proceedings of the First international joint conference on Ambient intelligence
A bio-inspired system model for interactive surveillance applications
Journal of Ambient Intelligence and Smart Environments
Video based technology for ambient assisted living: A review of the literature
Journal of Ambient Intelligence and Smart Environments
Handbook of Ambient Assisted Living: Technology for Healthcare, Rehabilitation and Well-being - Volume 11 of Ambient Intelligence and Smart Environments
Ambient intelligence for quality of life assessment
Journal of Ambient Intelligence and Smart Environments - Ambient and Smart Component Technologies for Human Centric Computing
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Analysis of daily-living behavior is an important approach to assess the wellbeing of an elderly person that lives at home alone. This paper presents an approach to monitoring an individual in the home environment by an ambient-intelligence system in order to detect anomalies in daily-living patterns. The proposed method is based on transforming the sequence of posture and spatial information using a novel matrix presentation to extract spatial-activity features. Then, an outlier-detection method is used for a classification of the individual's usual and unusual daily patterns regardless, of the cause of the problem, be it physical or mental. Experiments indicate that the proposed algorithm successfully discriminates between the daily behavior patterns of a healthy person and those with health problems.