Affective SSVEP BCI to effectively control 3D objects by using a prism array-based display

Sungchul Mun; Min-Chul Park

doi:10.1117/12.2053651

5 June 2014 Affective SSVEP BCI to effectively control 3D objects by using a prism array-based display

Sungchul Mun, Min-Chul Park

Proceedings Volume 9117, Three-Dimensional Imaging, Visualization, and Display 2014; 91170U (2014) https://doi.org/10.1117/12.2053651
Event: SPIE Sensing Technology + Applications, 2014, Baltimore, MD, United States

Abstract

3D objects with depth information can provide many benefits to users in education, surgery, and interactions. In particular, many studies have been done to enhance sense of reality in 3D interaction. Viewing and controlling stereoscopic 3D objects with crossed or uncrossed disparities, however, can cause visual fatigue due to the vergenceaccommodation conflict generally accepted in 3D research fields. In order to avoid the vergence-accommodation mismatch and provide a strong sense of presence to users, we apply a prism array-based display to presenting 3D objects. Emotional pictures were used as visual stimuli in control panels to increase information transfer rate and reduce false positives in controlling 3D objects. Involuntarily motivated selective attention by affective mechanism can enhance steady-state visually evoked potential (SSVEP) amplitude and lead to increased interaction efficiency. More attentional resources are allocated to affective pictures with high valence and arousal levels than to normal visual stimuli such as white-and-black oscillating squares and checkerboards. Among representative BCI control components (i.e., eventrelated potentials (ERP), event-related (de)synchronization (ERD/ERS), and SSVEP), SSVEP-based BCI was chosen in the following reasons. It shows high information transfer rates and takes a few minutes for users to control BCI system while few electrodes are required for obtaining reliable brainwave signals enough to capture users’ intention. The proposed BCI methods are expected to enhance sense of reality in 3D space without causing critical visual fatigue to occur. In addition, people who are very susceptible to (auto) stereoscopic 3D may be able to use the affective BCI.

Citation Download Citation

Sungchul Mun and Min-Chul Park "Affective SSVEP BCI to effectively control 3D objects by using a prism array-based display", Proc. SPIE 9117, Three-Dimensional Imaging, Visualization, and Display 2014, 91170U (5 June 2014); https://doi.org/10.1117/12.2053651

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KEYWORDS

Visualization

Brain-machine interfaces

Prisms

3D displays

Eye

Control systems

3D vision

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