Sökning: "Brain-Computer Interface BCI Speller"

Hittade 2 uppsatser innehållade orden Brain-Computer Interface BCI Speller.

1. 1. EEG enhancement for EEG source localization in brain-machine speller

   Master-uppsats, Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

   Författare :Parinaz Babaeeghazvini; [2013]
   Nyckelord :Brain-Computer interface BCI ; Brain-machine speller; Electroencephalogram EEG ; source localization; source reconstruction;

   Sammanfattning : A Brain-Computer Interface (BCI) is a system to communicate with external world through the brain activity. The brain activity is measured by Electro-Encephalography (EEG) and then processed by a BCI system. EEG source reconstruction could be a way to improve the accuracy of EEG classification in EEGbased brain–computer interface (BCI). LÄS MER

3. 2. Localization of Brain Activity in Electroencephalography Data during Brain-Computer Interface Operation

   Master-uppsats, Lunds universitet/Avdelningen för Biomedicinsk teknik

   Författare :Oskar Hjärtquist; [2011]
   Nyckelord :P300 ; N200; Event-related potential ERP; Noise Subspace Fitting NSF ; Null Space Projection NP ; Localization; Dipole source; Elec- troencephalography EEG ; Brain-Computer Interface BCI Speller; Technology and Engineering;

   Sammanfattning : In this Master's thesis I present a means of finding active sources of cortical electrical activity from electroencephalogram (EEG) data acquired during operation of a brain-computer interface (BCI). A novel subspace-based technique was used to suppress spatially correlated EEG interference sources, followed by a technique that estimates the source parameters with a near maximum likelihood performance. LÄS MER