Design of Brain Computer Interface Based on Eye Movements

Yıl 2020, Cilt: 12 Sayı: 1, 176 - 188, 31.01.2020

Engin Koç Oğuz Bayat Dilek Göksel Duru , Adil Deniz Duru

https://doi.org/10.29137/umagd.555494

Cited By: 2

Öz

With the help of modern technology, people's reactions to stimuli by
examining the eye movements have become traceable. One of these measurement
methods is the Eye Tracking technique. The technical advancements of this
technique enable researchers to carry out studies in the fields of health, war
industry, civil aviation, web design, digital media etc. that can enhance to
improve the quality of the systems that can make life easier. In the concept of
this study, a brain computer interface (BCI) is developed by using the principal
properties of the eye tracking technology. Eye fixation information of the
subjects were measured by using the in-house developed experimental paradigm
software with the eye tracker while they were performing the required tasks.
Two different experimental paradigm software were implemented. In the former
one, subjects were asked to fixate to the buttons that appeared on the screen
and they were clicked when the subjects fixated on those buttons. In the latter
one, a virtual keyboard was implemented where the subjects were asked to fixate
on the characters in order to write words or sentences. Additionally, eye
fixations were plotted with the use of heat maps. All of the methods and tools
were developed by our team. As a result, a hybrid BCI has been produced using
the eye movements of subjects without performing a movement. The developed
software tools were applied and high values of instruction per minute was
obtained. Experimental results showed that the proposed methodology can be a
pioneering technology.  

Anahtar Kelimeler

Brain computer interface design based on eye movements, Human-Computer Interaction, virtual keyboard

Göz Hareketlerine Dayalı Beyin Bilgisayar Arayüzü Tasarımı

Öz

Modern teknoloji ile birlikte insanların göz
hareketlerini inceleyerek uyaranlara karşı vermiş oldukları tepkiler takip
edilebilir hale gelmiştir. Bu takip yöntemlerden biri de Göz İzleme
(Eye-Tracking) tekniğidir. Bu teknikteki gelişmeler sayesinde araştırmacılar, sağlık,
savaş sanayi, sivil havacılık, web tasarımı, dijital medya vb. birçok alanda
hayatı daha kolay hale getirilebilecek sistemler hakkında çalışmalar yapabilmektedir.
Bu çalışma kapsamında, göz izleme teknolojisinin temel özelliklerinden faydalanılarak
beyin bilgisayar arayüzü (BBA) uygulaması geliştirilmiştir. Katılımcıların göz
sabitlenme bilgisi, tarafımızca hazırlanan deneysel paradigma yazılımları
bünyesinde göz-izleme cihazı ile ölçülerek, kişilerden verilen ödevleri
gerçekleştirmeleri istenmiştir. Bu kapsamda iki farklı uyaran yazılımı
üretilmiştir. Birinci yazılımda, kişilerin ekranda çeşitli bölgelerde görülen
butonlara odaklanarak, gözlerinin sabitlenmesi ile butonlara basmaları
sağlanmıştır. İkinci yazılımda ise, katılımcının harflere odaklanması
istenerek, kelimeler ve cümleleri yazdırmayı sağlayan sanal bir klavye
uygulaması geliştirilmiştir. Ayrıca göz fiksasyonları ısı haritası ile
görselleştirilmiştir. Tüm aşamalarda kullanılan yazılım ve analiz tarafımızca
geliştirilmiştir. Sonuç olarak, hareket etmeden göz hareketleri ile bildirim
yapmayı sağlayan hibrid bir sistem geliştirilmiştir. Göz hareketlerine dayalı
önerilen BBA sistemi test edilmiş ve yüksek komut/dakika sonuçlarına
ulaşılmıştır. Deneysel bulgular önerilen hibrid BBA’nın güçlü ve öne çıkacak
bir teknoloji olduğunu göstermektedir. 

Anahtar Kelimeler

Göz hareketlerine dayalı beyin bilgisayar arayüz tasarımı, İnsan-Bilgisayar Etkileşimi, göz izleme, sanal klavye

Kaynakça

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