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Finger movements recognition using minimally redundant features of wavelet denoised EMG

  • Nabasmita Phukan
  • Nayan M. KakotyEmail author
  • Prastuti Shivam
  • John Q. Gan
Original Paper
  • 33 Downloads

Abstract

Developing prosthetic hands with high functionality and ease of use is the focus of current research in the area of Electromyogram (EMG) based prosthesis control. Although individuals with upper limb loss can perform grasping operations with currently available prosthetic hands, more intuitive control of finger movements is required to replicate the complex motor functions of human hands. A significant challenge is to classify the finger movements with higher recognition rates using a smaller number of EMG channels. This paper reports a novel criterion for selection of minimally redundant EMG feature set for classification of 10-class finger movements using two-channel EMG. The feature set is selected from wavelet denoised EMG at four decomposition levels using minimum redundancy in terms of mutual information. A set of five features: root mean square, simple square integral, slope sign change, peak frequency and power spectral ratio have been selected from 31 time and frequency domain features. Using the current state of the art classification technique based on support vector machine, we achieved 10-fold cross-validation recognition rate of 96.5 ± 0.13%. The experimental study shows that the feature set with minimum redundancy in terms of mutual information ensures the highest recognition rate with reduced computational cost.

Keywords

Electromyogram Wavelet denoising Feature selection Minimum redundancy Finger movements recognition 

Notes

Funding

There is no funding source.

Compliance with Ethical Standards

Conflict of interests

The authors declare that they have no conflict of interest.

Ethical approval

This article does not contain any studies with human participants or animals performed by any of the authors. However, the acquisition of electromyogram using surface electrodes from four healthy subjects was in line with permission of the Institutional Ethical Committee.

Informed Consent

Informed consent was obtained from all individual participants included in the study.

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Copyright information

© IUPESM and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Nabasmita Phukan
    • 1
  • Nayan M. Kakoty
    • 1
    Email author
  • Prastuti Shivam
    • 1
  • John Q. Gan
    • 2
  1. 1.Embedded Systems and Robotics Laboratory, School of EngineeringTezpur UniversityTezpurIndia
  2. 2.School of Computer Science and Electronic EngineeringUniversity of EssexEssexUK

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