{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,8]],"date-time":"2026-02-08T06:18:24Z","timestamp":1770531504933,"version":"3.49.0"},"reference-count":70,"publisher":"MDPI AG","issue":"21","license":[{"start":{"date-parts":[[2020,11,6]],"date-time":"2020-11-06T00:00:00Z","timestamp":1604620800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100012511","name":"Escuela Polit\u00e9cnica Nacional","doi-asserted-by":"publisher","award":["PIE-CEPRA-XIII-2019-13"],"award-info":[{"award-number":["PIE-CEPRA-XIII-2019-13"]}],"id":[{"id":"10.13039\/501100012511","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Corporaci\u00f3n Ecuatoriana para el Desarrollo de la Investigaci\u00f3n y la Academia (CEDIA)","award":["CEPRA-XIII-2019-13-Reconocimiento de Gestos"],"award-info":[{"award-number":["CEPRA-XIII-2019-13-Reconocimiento de Gestos"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Hand gesture recognition (HGR) systems using electromyography (EMG) bracelet-type sensors are currently largely used over other HGR technologies. However, bracelets are susceptible to electrode rotation, causing a decrease in HGR performance. In this work, HGR systems with an algorithm for orientation correction are proposed. The proposed orientation correction method is based on the computation of the maximum energy channel using a synchronization gesture. Then, the channels of the EMG are rearranged in a new sequence which starts with the maximum energy channel. This new sequence of channels is used for both training and testing. After the EMG channels are rearranged, this signal passes through the following stages: pre-processing, feature extraction, classification, and post-processing. We implemented user-specific and user-general HGR models based on a common architecture which is robust to rotations of the EMG bracelet. Four experiments were performed, taking into account two different metrics which are the classification and recognition accuracy for both models implemented in this work, where each model was evaluated with and without rotation of the bracelet. The classification accuracy measures how well a model predicted which gesture is contained somewhere in a given EMG, whereas recognition accuracy measures how well a model predicted when it occurred, how long it lasted, and which gesture is contained in a given EMG. The results of the experiments (without and with orientation correction) executed show an increase in performance from 44.5% to 81.2% for classification and from 43.3% to 81.3% for recognition in user-general models, while in user-specific models, the results show an increase in performance from 39.8% to 94.9% for classification and from 38.8% to 94.2% for recognition. The results obtained in this work evidence that the proposed method for orientation correction makes the performance of an HGR robust to rotations of the EMG bracelet.<\/jats:p>","DOI":"10.3390\/s20216327","type":"journal-article","created":{"date-parts":[[2020,11,6]],"date-time":"2020-11-06T09:03:04Z","timestamp":1604653384000},"page":"6327","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":28,"title":["An Energy-Based Method for Orientation Correction of EMG Bracelet Sensors in Hand Gesture Recognition Systems"],"prefix":"10.3390","volume":"20","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5184-3759","authenticated-orcid":false,"given":"Lorena Isabel Barona","family":"Barona L\u00f3pez","sequence":"first","affiliation":[{"name":"Artificial Intelligence and Computer Vision Research Lab, Escuela Polit\u00e9cnica Nacional, Quito 170517, Ecuador"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3502-020X","authenticated-orcid":false,"given":"\u00c1ngel Leonardo Valdivieso","family":"Valdivieso Caraguay","sequence":"additional","affiliation":[{"name":"Artificial Intelligence and Computer Vision Research Lab, Escuela Polit\u00e9cnica Nacional, Quito 170517, Ecuador"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3407-314X","authenticated-orcid":false,"given":"Victor H.","family":"Vimos","sequence":"additional","affiliation":[{"name":"Artificial Intelligence and Computer Vision Research Lab, Escuela Polit\u00e9cnica Nacional, Quito 170517, Ecuador"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8263-2682","authenticated-orcid":false,"given":"Jonathan A.","family":"Zea","sequence":"additional","affiliation":[{"name":"Artificial Intelligence and Computer Vision Research Lab, Escuela Polit\u00e9cnica Nacional, Quito 170517, Ecuador"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6372-7405","authenticated-orcid":false,"given":"Juan P.","family":"V\u00e1sconez","sequence":"additional","affiliation":[{"name":"Artificial Intelligence and Computer Vision Research Lab, Escuela Polit\u00e9cnica Nacional, Quito 170517, Ecuador"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2781-2506","authenticated-orcid":false,"given":"Marcelo","family":"\u00c1lvarez","sequence":"additional","affiliation":[{"name":"Departamento de El\u00e9ctrica y Electr\u00f3nica, Universidad de las Fuerzas Armadas ESPE, Sangolqu\u00ed 171103, Ecuador"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5275-7262","authenticated-orcid":false,"given":"Marco E.","family":"Benalc\u00e1zar","sequence":"additional","affiliation":[{"name":"Artificial Intelligence and Computer Vision Research Lab, Escuela Polit\u00e9cnica Nacional, Quito 170517, Ecuador"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2020,11,6]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Jaramillo-Y\u00e1nez, A., Benalc\u00e1zar, M.E., and Mena-Maldonado, E. 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