입체 시력이 양호한 사람과 불량인 사람간의 입체시 융합 가능 영역 비교

Abstract

Purpose: This study investigated differences in stereoscopic fusional area between those with good and poor stereoacuity in viewing stereoscopic displays. Methods: Stereo acuity of 39 participants (18 males and 21 females, 23.6±3.15years) was measured with the random dot stereo butterfly method. Participants with stereo-blindness were not included.Stereoscopic fusional area was measured using stereoscopic stimulus by varying the amount of horizontal disparity in astereoscopic 3D TV. Participants were divided into two groups of good and poor stereo acuity. Criterion for good stereoacuity was determined as less than 60 arc seconds. Measurements arising from the participants were statisticallyanalyzed. Results: 26 participants were measured to have good stereo acuity and 13 participants poor stereo acuity. Incase of the stereoscopic stimulus farther than the fixation point, threshold of horizontal disparity for those with poorstereo acuity were measured to be smaller than the threshold for those with good stereo acuity, with a statisticallysignificant difference. On the other hand, there was no statistically significant difference between the two groups, in caseof the stereoscopic stimulus nearer to the fixation point. Conclusions: In viewing stereoscopic displays, the boundary ofstereoscopic fusional area for the poor stereo acuity group was smaller than the boundary of good stereo acuity grouponly for the range behind the display. Hence, in viewing stereoscopic displays, participants with poor stereo acuity wouldhave more difficulty perceiving the fused image at farther distances compared to participants with good stereo acuity.Key words: Stereo acuity, Stereoscopic fusional area, Stereoscopic display