Unobtrusive Activity Recognition of Elderly People Living Alone Using Anonymous Binary Sensors and DCNN

Munkhjargal Gochoo, Tan Hsu Tan, Shing Hong Liu, Fu Rong Jean, Fady S. Alnajjar, Shih Chia Huang

Research output: Contribution to journalArticlepeer-review

96 Citations (Scopus)


Elderly population (over the age of 60) is predicted to be 1.2 billion by 2025. Most of the elderly people would like to stay alone in their own house due to the high eldercare cost and privacy invasion. Unobtrusive activity recognition is the most preferred solution for monitoring daily activities of the elderly people living alone rather than the camera and wearable devices based systems. Thus, we propose an unobtrusive activity recognition classifier using deep convolutional neural network (DCNN) and anonymous binary sensors that are passive infrared motion sensors and door sensors. We employed Aruba annotated open data set that was acquired from a smart home where a voluntary single elderly woman was living inside for eight months. First, ten basic daily activities, namely, Eating, Bed-to-Toilet, Relax, Meal-Preparation, Sleeping, Work, Housekeeping, Wash-Dishes, Enter-Home, and Leave-Home are segmented with different sliding window sizes, and then converted into binary activity images. Next, the activity images are employed as the ground truth for the proposed DCNN model. The 10-fold cross-validation evaluation results indicated that our proposed DCNN model outperforms the existing models with F1-score of 0.79 and 0.951 for all ten activities and eight activities (excluding Leave-Home and Wash-Dishes), respectively.

Original languageEnglish
Article number8355255
Pages (from-to)693-702
Number of pages10
JournalIEEE Journal of Biomedical and Health Informatics
Issue number2
Publication statusPublished - Mar 2019


  • Unobtrusive
  • activity recognition
  • deep learning
  • device-free
  • elder care

ASJC Scopus subject areas

  • Health Information Management
  • Health Informatics
  • Electrical and Electronic Engineering
  • Computer Science Applications


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