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Reseach Article

Accelerometer-based Activity Recognition: Reengineering Study

by Ftoon Kedwan
International Journal of Computer Applications
Foundation of Computer Science (FCS), NY, USA
Volume 178 - Number 32
Year of Publication: 2019
Authors: Ftoon Kedwan
10.5120/ijca2019919166

Ftoon Kedwan . Accelerometer-based Activity Recognition: Reengineering Study. International Journal of Computer Applications. 178, 32 ( Jul 2019), 11-18. DOI=10.5120/ijca2019919166

@article{ 10.5120/ijca2019919166,
author = { Ftoon Kedwan },
title = { Accelerometer-based Activity Recognition: Reengineering Study },
journal = { International Journal of Computer Applications },
issue_date = { Jul 2019 },
volume = { 178 },
number = { 32 },
month = { Jul },
year = { 2019 },
issn = { 0975-8887 },
pages = { 11-18 },
numpages = {9},
url = { https://ijcaonline.org/archives/volume178/number32/30742-2019919166/ },
doi = { 10.5120/ijca2019919166 },
publisher = {Foundation of Computer Science (FCS), NY, USA},
address = {New York, USA}
}
%0 Journal Article
%1 2024-02-07T00:52:00.501848+05:30
%A Ftoon Kedwan
%T Accelerometer-based Activity Recognition: Reengineering Study
%J International Journal of Computer Applications
%@ 0975-8887
%V 178
%N 32
%P 11-18
%D 2019
%I Foundation of Computer Science (FCS), NY, USA
Abstract

Topic: This study aims to invent a tool to detect human activities using the power of classifiers ensemble approach to recognize activities based on accelerometers measures. Further classifiers performances were compared and analyzed for the aim of obtaining a magnificent physical activities recognition performance. Methodology: Accelerometer sensors of smartphones were used to recognize specific human activities. WEKA machine learning software was used to run the experiments. Average of probabilistic combining rule was used to combine Multilayer perceptron (MLP), Decision tree (J48), and Logistic regression techniques. This model is about using the voting algorithm to combine the power of those three classifiers. The reproduced voting results were then compared with few extra classification algorithms proposed in this article such as KNN, K Star, Random Forest, Naïve Bayes, Decision table, and PART. The additional ensemble techniques are Boosting, Bagging, and Stacking. 10-fold cross validation was used to validate accuracies of the resulted models. Confusion matrices of each classifier were obtained and analyzed. For models’ evaluation, accuracy, F-measure, and Area Under Curve (AUC) was calculated to evaluate models’ performances in addition to Precision and Recall measures. A dataset of 5,418 instances was used. Results & Discussion: In general, the results of Accuracy, AUC, F-Measure, Recall, and precision shows that Random Forest classifier achieved the best performance compared to the authors proposed voting technique for all physical activities except for jogging (RF=98.40, Voting=99.60) and standing (94.30, Voting=97.20) even though the difference is limited to a maximum of 0.10% weighted score for RF. In addition, Bagging ensemble technique achieved considerably high scores similar to the voting technique with a difference of a maximum of 0.20% between both classifiers. On the other hand, Boosting and Stacking algorithms achieved the poorest performances among other classifiers ranging from 14.80% to 74.70%.

References
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Index Terms

Computer Science
Information Sciences

Keywords

Activity Recognition Weka Accelerometer Sensors Classification Algorithm.