Control of a Virtual Hand Using a Brain-Computer Interface System: Finding Suitable Features and Classifiers for an Asynchronous BCI System in the Offline State to Control a Virtual Hand in 6-DOF
Language: English
Published by LAP LAMBERT Academic Publishing, 2011
- Softcover
- New
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- Title
- Control of a Virtual Hand Using a Brain-Computer Interface System: Finding Suitable Features and Classifiers for an Asynchronous BCI System in the Offline State to Control a Virtual Hand in 6-DOF
- Author
- Aziz, Nida
- Publisher
- LAP LAMBERT Academic Publishing
- Publication year
- 2011
- Condition
- New
- Binding
- Soft cover
- Language
- English
- ISBN 10
- 384430441X
- ISBN 13
- 9783844304411
An Asynchronous BCI was designed using non-cue based data collected from several participants in two separate sessions with different protocols. Several different features were extracted and evaluated using the DBI and the best of these, the joint time- frequency (JTF) feature, was chosen for detecting onset and classifying mental tasks. For onset detection, two different methods were employed and compared on the basis of classification performance obtained from confusion matrices, repeatability and ease of application. Different classifiers were tested for onset detection of which Linear Discriminant Analysis (LDA) classifier showed better results. The classified onset using JTF features and LDA classifier was then used to select the active period data in both sessions, which was then sent to the mental task classifier. Mental Task classification was done using Neural Networks, Support Vector Machines and LDA. The performance of the mental task classifier was also evaluated using confusion matrices. A virtual hand was developed graphically in MATLAB and was programmed to move in 6 different directions according to the classified outputs.
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About the Author
The author was born in Pakistan. She did her graduate study in Mechatronics Engineering from National University of Science and Technology(NUST), Pakistan and her Postgraduate study in Robotics from UK. Currently she is a Lecturer at NUST.
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