Design and development of phoneme based sign language recognition system for the hearing impaired
Sign language recognition is one of the most promising sub-fields in gesture recognition research. Sign languages are commonly developed for hearing impaired communities, which can include interpreters, friends and families of hearing impaired people as well...
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| Main Author: | |
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| Format: | Thesis |
| Language: | English |
| Published: |
Universiti Malaysia Perlis (UniMAP)
2014
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| Subjects: | |
| Online Access: | http://dspace.unimap.edu.my:80/dspace/handle/123456789/31948 |
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| Summary: | Sign language recognition is one of the most promising sub-fields in gesture recognition
research. Sign languages are commonly developed for hearing impaired communities,
which can include interpreters, friends and families of hearing impaired people as well
as people who are hard of hearing themselves. This thesis discusses the development of
a Phoneme based sign language recognition system for the hearing impaired. Previous
research on sign language recognition systems have concentrated on finger spellings
recognition or isolated word recognition. This research focuses on developing a sign
language recognition system for recognizing 44 English phonemes. To represent the 44
English phonemes, as a first step, 11 different gestures were developed. By selecting
suitable combination of these 11 gestures for the right and left hand, 44 different gesture
combinations were formulated. The signed data are collected from seven subjects using
an ordinary web camera at a resolution of 640×480 pixels. The data is preprocessed and
features are extracted from the segmented regions of the signed data. A newly proposed
interleaving preprocessing algorithm used in developing the sign language recognition
system is discussed in this thesis. Artificial Neural Network (ANN) provides alternative
form of computing that attempts to mimic the functionality of the brain. The feature set
is then feed to the neural network model to classify the phoneme sign. An audio system
is installed to play the particular word for the communication between the ordinary
people and hearing impaired community. Experimental results show that the use of
proposed interleaving method yields a better classification accuracy compared to the
conventional method. The vertical interleaving method using combined blur and affine
moment invariant features and Elman network yields the maximum classification
accuracy of 95.50%. |
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