{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,9]],"date-time":"2026-05-09T05:24:28Z","timestamp":1778304268568,"version":"3.51.4"},"reference-count":113,"publisher":"MDPI AG","issue":"18","license":[{"start":{"date-parts":[[2021,9,9]],"date-time":"2021-09-09T00:00:00Z","timestamp":1631145600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Recent advances in Internet of Things (IoT) technologies and the reduction in the cost of sensors have encouraged the development of smart environments, such as smart homes. Smart homes can offer home assistance services to improve the quality of life, autonomy, and health of their residents, especially for the elderly and dependent. To provide such services, a smart home must be able to understand the daily activities of its residents. Techniques for recognizing human activity in smart homes are advancing daily. However, new challenges are emerging every day. In this paper, we present recent algorithms, works, challenges, and taxonomy of the field of human activity recognition in a smart home through ambient sensors. Moreover, since activity recognition in smart homes is a young field, we raise specific problems, as well as missing and needed contributions. However, we also propose directions, research opportunities, and solutions to accelerate advances in this field.<\/jats:p>","DOI":"10.3390\/s21186037","type":"journal-article","created":{"date-parts":[[2021,9,9]],"date-time":"2021-09-09T21:36:58Z","timestamp":1631223418000},"page":"6037","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":179,"title":["A Survey of Human Activity Recognition in Smart Homes Based on IoT Sensors Algorithms: Taxonomies, Challenges, and Opportunities with Deep Learning"],"prefix":"10.3390","volume":"21","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3623-3626","authenticated-orcid":false,"given":"Damien","family":"Bouchabou","sequence":"first","affiliation":[{"name":"IMT Atlantique Engineer School, 29238 Brest, France"},{"name":"Delta Dore Company, 35270 Bonnemain, France"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0929-0019","authenticated-orcid":false,"given":"Sao Mai","family":"Nguyen","sequence":"additional","affiliation":[{"name":"IMT Atlantique Engineer School, 29238 Brest, France"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0655-2880","authenticated-orcid":false,"given":"Christophe","family":"Lohr","sequence":"additional","affiliation":[{"name":"IMT Atlantique Engineer School, 29238 Brest, France"}]},{"given":"Benoit","family":"LeDuc","sequence":"additional","affiliation":[{"name":"Delta Dore Company, 35270 Bonnemain, France"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5323-1601","authenticated-orcid":false,"given":"Ioannis","family":"Kanellos","sequence":"additional","affiliation":[{"name":"IMT Atlantique Engineer School, 29238 Brest, France"}]}],"member":"1968","published-online":{"date-parts":[[2021,9,9]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"55","DOI":"10.1016\/j.cmpb.2008.02.001","article-title":"A review of smart homes\u2014Present state and future challenges","volume":"91","author":"Chan","year":"2008","journal-title":"Comput. 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