Sign language recognition using Kinect sensor based on color stream and skeleton points

Authors

  • Isack Bulugu University of Dar es Salaam, College of Information and Communication Technologies, Department of Electronics and Telecommunications, P. O. Box 33335 Dar es Salaam, Tanzania

DOI:

https://doi.org/10.4314/tjs.v47i2.32

Keywords:

Sign language, Color stream, Skeleton points, Kinect sensor, Discriminative dictionary

Abstract

This paper presents a sign language recognition system based on color stream and skeleton points. Several approaches have been established to address sign language recognition problems. However, most of the previous approaches still have poor recognition accuracy. The proposed approach uses Kinect sensor based on color stream and skeleton points from the depth stream to improved recognition accuracy. Techniques within this approach use hand trajectories and hand shapes in combating sign recognition challenges. Therefore, for a particular sign a representative feature vector is extracted, which consists of hand trajectories and hand shapes. A sparse dictionary learning algorithm, Label Consistent K-SVD (LC-KSVD) is applied to obtain a discriminative dictionary. Based on that, the system was further developed to a new classification approach for better results. The proposed system was fairly evaluated based on 21 sign words including one-handed signs and two-handed signs. It was observed that the proposed system gets high recognition accuracy of 98.25%, and obtained an average accuracy of 95.34% for signer independent recognition.

Keywords: Sign language, Color stream, Skeleton points, Kinect sensor, Discriminative dictionary.

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Published

27-05-2021

How to Cite

Bulugu, I. (2021). Sign language recognition using Kinect sensor based on color stream and skeleton points. Tanzania Journal of Science, 47(2), 769–778. https://doi.org/10.4314/tjs.v47i2.32

Issue

Section

Articles