A Novel SSVEP Approach for Google GlassChen Qian

Wearable Technology

Brain -Computer Interface

Google Glass+BCI=?

SSVEP

Amiri, Setare, et al. "A Review of P300, SSVEP, and Hybrid P300/SSVEP Brain-Computer Interface Systems." (2013).

System Configuration

Google Glass Brain

ComputerEEG Detection

Device

System Google Glass

Android

Bluetooth

Interface

SSVEP Frequency Chosen

an optimal signal-to-noise ratio (SNR) of the SSVEP can be usually achieved by stimulating in the 5–30 Hz range

the whole alpha band (6–13 Hz), and the early beta band (13–17 Hz) usually show better stimulus-related responses

minimize the inclusion of the mid-late beta (15–25 Hz) band because of its higher risk of inducing photoepileptic seizures

Parini, Sergio, et al. "A robust and self-paced BCI system based on a four class SSVEP paradigm: algorithms and protocols for a high-transfer-rate direct brain communication." Computational Intelligence and Neuroscience 2009 (2009).

Distance

Screen placed 40 cm away from the subject

Size

Google Glass Screen Resolution: 640 X 360

The pixels : 1/8th the physical width of those on the iPhone 5's retina display

Pattern Size : 5 -> 20

Size

15 pixel

5 pixel 10 pixel

20 pixel

Two patterns

40 pixel 10Hz

5 pixel 10Hz 20 pixel 10Hz

40 pixel 14Hz

Camera PreviewBackground

60 pixel 10Hz

40 pixel 10Hz 40 pixel 14Hz

Cameral Background

Subject Walking

Future Research

Changing the background color of the flashing areas into black

Reduce the noise signal coming from camera