An Interface using Electrooculography with Closed Eyes

Abstract

The purpose of our study was to determine the electrooculography (EOG) interface that can be used for amyotrophic lateral sclerosis (ALS) patients that can use without preparation. We proposed eye movement detection using Root Mean Square the active threshold (AT method) and k-nearest neighbor (k-NN) methods. The AT method is the threshold method that is dynamically calculated using the root mean square. This report describes the combined use of both methods. We conducted experiments on the waveform detection accuracy for 19 healthy subjects between the ages of 20 and 29 years. The hit rate for the proposed method was 94%, and the FA rate was 9%. Next, we calculated the information transfer rate (ITR), a popular evaluation index in for the brain-computer interface. (BCI). The minimum ITR using the proposed method was 19.02[bits/min]. The ITR of the P300 speller a BCI tool, was 16.4[bits/min]. The ITR of the proposed method was higher than that using the P300 speller. Therefore, it can be said that the proposed method has usefulness as an interface.

Emerging ExG-based NUI Inputs in Extended Realities: A Bottom-up Survey

“…It also claimed that retino-ocular potentials are best detected on the lids and external canthi (the bone on the side of the eye) [123]; however, such a placement might be considered obstructive and irritative, limiting the range of eye movements. In some studies EEG hardware with electrodes placed on specified positions around eye is used to measure EOG potentials: g.USBamp (number 23, Table 7) in Reference [144], OpenBCI (number 14, Table 6) in Reference [204], or medical-grade Mobi8 by TMSI [206] in Reference [200]. Many researchers have designed and built customised EOG-signal acquisition solutions: Reference [53] employed wet electrodes and custom made amplifier; hardware described in Reference [145] consists of two electrodes and Arduino-based amplifier; and Wu et al [215] used five wet electrodes, in-house designed amplification hardware with Bluetooth module.…”