Title: Towards electromyogram-based grasps classification

Authors: Nayan M. Kakoty; Shyamanta M. Hazarika

Addresses: Biomimetic and Cognitive Robotics Lab., School of Engineering, Tezpur University, Tezpur, India ' Biomimetic and Cognitive Robotics Lab., School of Engineering, Tezpur University, Tezpur, India

Abstract: This paper details a strategy of discriminating grasp types using surface electromyogram (EMG) signals, which has the potential to be applied for controlling extreme upper limb prosthesis. We have investigated the recognition of six grasp types used during 70% of daily living activities based on two-channel EMG. A grasp classification architecture and feature set have been proposed through the iterative development of the feature set as well as the classifier. Three different classifiers and a variety of features have been explored. From the experimental results, we have hypothesised that continuous wavelet transform function coefficients of the EMG signals having entropy values close to the entropy values of preprocessed EMG signals possess maximum informations about the grasp types. Further, sum of discrete wavelet transform coefficients of EMG signals has been established as a primal feature for grasp classification.

Keywords: grasp types; electromyogram; EMG signals; grasp recognition; grasp classification; extreme upper limb prosthesis; prosthetic control; feature sets; continuous wavelet transform; CWT; entropy values; discrete wavelet transform; DWT.

DOI: 10.1504/IJBBR.2014.064900

International Journal of Biomechatronics and Biomedical Robotics, 2014 Vol.3 No.2, pp.63 - 73

Available online: 20 Sep 2014 *

Full-text access for editors Access for subscribers Purchase this article Comment on this article