Human Activity Recognition Using Inertial Sensors in a Smartphone: An Overview

The ubiquity of smartphones and the growth of computing resources, such as connectivity, processing, portability, and power of sensing, have greatly changed people's lives. Today, many smartphones contain a variety of powerful sensors, including motion, location, network, and direction sensors....

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Bibliographic Details
Published in:Sensors (Basel, Switzerland) Switzerland), 2019-07, Vol.19 (14), p.3213
Main Authors: Sousa Lima, Wesllen, Souto, Eduardo, El-Khatib, Khalil, Jalali, Roozbeh, Gama, Joao
Format: Article
Language:English
Subjects:
Accelerometers
Accelerometry
Algorithms
Artificial intelligence
Cellular telephones
features extraction
Human Activities
Human activity recognition
Humans
inertial sensors
Neural networks
Sensors
Smartphone
Smartphones
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Summary:The ubiquity of smartphones and the growth of computing resources, such as connectivity, processing, portability, and power of sensing, have greatly changed people's lives. Today, many smartphones contain a variety of powerful sensors, including motion, location, network, and direction sensors. Motion or inertial sensors (e.g., accelerometer), specifically, have been widely used to recognize users' physical activities. This has opened doors for many different and interesting applications in several areas, such as health and transportation. In this perspective, this work provides a comprehensive, state of the art review of the current situation of human activity recognition (HAR) solutions in the context of inertial sensors in smartphones. This article begins by discussing the concepts of human activities along with the complete historical events, focused on smartphones, which shows the evolution of the area in the last two decades. Next, we present a detailed description of the HAR methodology, focusing on the presentation of the steps of HAR solutions in the context of inertial sensors. For each step, we cite the main references that use the best implementation practices suggested by the scientific community. Finally, we present the main results about HAR solutions from the perspective of the inertial sensors embedded in smartphones.
ISSN:1424-8220
1424-8220
DOI:10.3390/s19143213