Classification; Machine learning; Pattern recognition; Segmentation; Windowing; Linear discriminant analysis; Mean classification; Multiple data sets; Myoelectric control; Performance measure; Post-processing techniques; Recording devices; Segmentation scheme; Computer Science (all); Materials Science (all); Engineering (all); General Engineering; General Materials Science; General Computer Science
Abstract :
[en] Pattern recognition (PR) algorithms have shown promising results for upper limb myoelectric control (MEC). Several studies have explored the efficacy of different pre and post processing techniques in implementing PR-based MECs. This paper explores the effect of segmentation type (disjoint and overlap) and segment size on the performance of PR-based MEC, for multiple datasets recorded with different recording devices. Two PR-based methods; linear discriminant analysis (LDA) and support vector machine (SVM) are used to classify hand gestures. Optimum values of segment size, step size and segmentation type were considered as performance measure for a robust MEC. Statistical analysis showed that optimum values of segment size for disjoint segmentation are between 250ms and 300ms for both LDA and SVM. For overlap segmentation, best results have been observed in the range of 250ms-300ms for LDA and 275ms-300ms for SVM. For both classifiers the step size of 20% achieved highest mean classification accuracy (MCA) on all datasets for overlap segmentation. Overall, there is no significant difference in MCA of disjoint and overlap segmentation for LDA (P-value = 0.15) but differ significantly in the case of SVM (P-value < 0.05). For disjoint segmentation, MCA of LDA is 88.68% and for SVM, it is 77.83%. Statistical analysis showed that LDA outperformed SVM for disjoint segmentation (P-value<0.05). For overlap segmentation, MCA of LDA is 89.86% and for SVM, it is 89.16%, showing that statistically, there is no significant difference between MCA of both classifiers for overlap segmentation (P-value = 0.45). The indicated values of segment size and overlap size can be used to achieve better performance results, without increasing delay time, for a robust PR-based MEC system.
Disciplines :
Electrical & electronics engineering
Author, co-author :
Ashraf, Hassan ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Laboratoire des Systèmes Multicorps et Mécatroniques ; Department of Biomedical Engineering and Sciences, School of Mechanical and Manufacturing Engineering (SMME), National University of Science and Technology (NUST), Islamabad, Pakistan
Waris, Asim ; Department of Biomedical Engineering and Sciences, School of Mechanical and Manufacturing Engineering (SMME), National University of Science and Technology (NUST), Islamabad, Pakistan
Jamil, Mohsin ; Department of Biomedical Engineering and Sciences, School of Mechanical and Manufacturing Engineering (SMME), National University of Science and Technology (NUST), Islamabad, Pakistan ; Department of Electrical and Computer Engineering, Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St John's, Canada
Gilani, Syed Omer ; Department of Biomedical Engineering and Sciences, School of Mechanical and Manufacturing Engineering (SMME), National University of Science and Technology (NUST), Islamabad, Pakistan
Niazi, Imran Khan ; Center of Chiropractic Research, New Zealand College of Chiropractic, Auckland, New Zealand
Kamavuako, Ernest Nlandu ; Department of Informatics, King's College London, London, United Kingdom
Gilani, Syed Hammad Nazeer ; Department of Mechatronics Engineering, Air University, Islamabad, Pakistan
Language :
English
Title :
Determination of Optimum Segmentation Schemes for Pattern Recognition-Based Myoelectric Control: A Multi-Dataset Investigation
Publication date :
2020
Journal title :
IEEE Access
ISSN :
2169-3536
Publisher :
Institute of Electrical and Electronics Engineers Inc.
This work was supported by the Higher Education Commission (HEC) of Pakistan under Grant 10238/Federal/NRPU/R&D/HEC/2017.This work was supported by the Higher Education Commission (HEC) of Pakistan under Grant 10238/Federal/NRPU/RandD/HEC/2017
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