Activity Recognition using Multi-Class Classification inside an Educational Building

Anooshmita Das, Mikkel Baun Kjærgaard

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


Activity Recognition can be referred to as the process of describing and classifying actions, pinpoint specific movements, and extract unique patterns from the dataset us-ing heterogeneous sensing modalities. Activity Recognition approaches have garnered the attention of researchers in the energy management domain to enhance energy utilization in buildings.In our experiment, we define activities as a combination of different actions, which are detected using multiple sensors. To learn insights for the various activities, we used inexpensivePassive Infrared (PIR) sensors in the test-bed. This study aims at gaining high-level knowledge about activities from the low-resolution sensors deployed. For accurate occupancy counts, we have used 3D Stereo Vision Cameras at the entrance, and count lines are defined to capture the transitions of inflow and outflow of multiple occupants. Multi-class labels enable activity recognition on the collected dataset. The multi-class labels used are 1) Moving, 2) Stagnant, 3) Outside, 4) Both (Moving andStagnant), 5) No activity inside. The labeling for the multi-class is done through an algorithm using supervised learning.The data acquisition gets carried out from 23rdNovember to3rdDecember 2018, spanning over a period for 11 days. The results document that Gradient Boosting Classifier outperforms any other Machine Learning Classification (MLC) algorithm with an accuracy of 97.59% and an F1 score of 97.40% for activity recognition. This paper also explicitly highlights the challenges and limitations faced during the initial phase for the deployment, and it identifies the key research trends and directs towards the potential improvements in the field of occupancy sensing for energy-efficient buildings
Original languageEnglish
Title of host publication2020 IEEE International Conference on Pervasive Computing and Communications Workshops (PerCom Workshops)
Number of pages6
Publication date2020
ISBN (Electronic)978-1-7281-4716-1
Publication statusPublished - 2020
EventARDUOUS 2020: 4th International Workshop on Annotation of useR Data for UbiquitOUs Systems - Austin, United States
Duration: 23. Mar 202027. Nov 2020
Conference number: 4


ConferenceARDUOUS 2020
CountryUnited States


  • Building performance
  • Occupant Behavior
  • Sensor fusion
  • Pattern Recognition
  • Knowledge discovery
  • Machine Learning
  • activity recognition
  • Activity Recognition
  • Building Performance
  • Knowledge Discovery
  • Occupant Behaviour
  • Sensor Fusion

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