EOG-based interface and speech recognition for wheelchair control

Sucres, Marlene Alejandra Dominguez; Perez, Sarahi Soledad Franco; Zavala, Ilse Valeria Gomez; Ramirez, Diana Laura Infante; Hernández, Noel Batista

doi:10.1109/icev.2019.8920815

Cited by 3 publications

(3 citation statements)

References 8 publications

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“…The functioning of the circuit has been verified by its ability to produce clear signals with minimal distortions. The amplitude values in Figures 9,10,11,12,13,14,15,16,17,18,19,20 and 21 are consistent with that of the EOG signals, thus proving that all applied electrode positions are active sites of signal acquisition that can be used as inputs in biomedical applications. Furthermore, it can be confirmed that the signals are indeed EOG signals due to the similarity in waveform shape to that of a general EOG signal [6,14].…”

Section: Discussionsupporting

confidence: 63%

“…Each of these values is represented by a different color. Figures 9,10,11,12,13,14,15,16,17,18,19,20 and 21 show the peak-to-peak voltage data obtained for all seven subjects for all electrode positions. Each of these values is in volts and represents the peak-to-peak amplitude of the EOG signal.…”

Section: Resultsmentioning

confidence: 99%

“…EOG based systems have been designed for controlling the virtual keyboard and mouse cursor [11][12][13]. Recently some researchers have used a stable EOG interfacing unit for controlling electric wheelchairs for disabled people [14][15][16][17][18]. Signal de-noising methods such as wavelet transform technique, amplification procedure and artifacts reduction techniques have been employed to get an excellent noise-free EOG signal [5,19].…”

Section: Literature Reviewmentioning

confidence: 99%

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Study of electrooculography signal acquisition sites for assistive device applications

Raj¹

2021

IJATEE

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Electrooculography (EOG) is a technique that involves the measurement of the corneo-retinal standing potential of the eye. The human eye acts as a dipole between the cornea (positive potential) and the retina (negative potential), creating an electric field around the eyeball. The resulting electric signal obtained from this field is called electrooculogram. These signals, generated by eye movements, could be measured by employing different electrode placement configurations for the acquisition. The properties of these signals change depending on the number and placement of the electrodes. The study conducted here describes EOG signal acquisition using new electrode placement configurations that employ fewer facial electrodes placed on the patient. Three pre-gelled disposable electrodes were utilized for this purpose. Only one electrode was placed on a facial location, enhancing patient comfort during the acquisition procedure. To support this study, a lowcost signal acquisition hardware was developed. Using active filtering and amplification, appropriate signal processing techniques were executed upon the horizontal EOG signal acquired to reduce noise and interference due to external conditions. Hence, this paper presents the findings of new electrode placement sites for the acquisition of EOG signals which could be used for assistive device applications while restricting the number of facial electrodes to one. Most of the studies regarding the EOG signal acquisition had been using all electrodes in the face region. In contrast, we reduced the number of electrodes in the face region, thereby providing patient comfort. The comparison was made mainly on the acquired data from these new locations to discover the configuration with the optimal signal response using data obtainedfrom seven healthy subjects. The amplitude values were being compared from the new locations with the standard acquisition sites. The findings of this study were found to have a productive result. The total gain of the system required for new electrode placement configurations was two times more than the total gain required for standard acquisition sites, and also, the amplitude was less but can be helpful for assistive device applications. The average peak to peak amplitude value of the EOG signal for the new site came around about 1.25 volt.

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