Using bio-signals to evaluate multi discomfort in image viewing - balancing visually induced motion sickness and field of view -

Visually induced motion sickness (VIMS) is a key factor triggering discomfort with image viewing systems. Reducing VIMS by shrinking the field of view (FOV) is effective though this increases discomfort through situational awareness loss. This paper derives an objective score from bio-signals to evaluate multifactor discomforts caused by VIMS and FOV. We also investigate the image characteristics that induce discomfort. The subjective score and LF/HF_score ratio index increase with FOV as expected. Another result is that for some image sequences the bio-signal index increases significantly more at smallest FOV than with large FOV mode. This result suggests that the bio-signal index could be key indicator of multifactor discomfort, including balance of VIMS and FOV.