旋转偏差对立体显示舒适度影响的ERP研究

Study on ERP for the Effect of Rotation Distortions on Visual Comfort

影响立体显示舒适度的因素有多种,其中左右视图的不协调是主要原因之一,旋转偏差是影响协调性的重要因素之一.本文基于事件相关电位技术,采用S1~S2实验范式,研究了旋转偏差对立体显示舒适度的影响.利用左右视图的旋转偏差在大脑皮层会诱发出N270成分,结合行为数据以及ERP波形进行分析得出,旋转偏差超过0.72°时,被试感觉能够察觉到明显的不协调,随着偏差等级增大,被试不协调感逐渐增强.行为数据的统计分析结果与ERP信号结果一致.因此立体视图左右图像的旋转偏差应该控制在0.72°以内.

There are lots of factors that affect visual comfort of3D display and incongruity between two viewpoints is one of the major factors,while rotation distortion is one of the contributing factors of incongruity.Based on eventrelated-potential(ERP)technology and applying S1-S2experimental paradigm,the correlation between rotation distortion and visual comfort of stereo display is studied.N270component will be evoked while there are rotation distortions between two viewpoints.After statistical analysis of behavior data and ERP,it can be concluded that subjects cannot perceive obvious incongruity as the rotation distortions remain within0.72°and the perception of incongruity or discomfort increases as the level of distortion rises.Statistical analysis of behavior data is highly correlated with ERP data,indicating that ERP can be used to assess the effects of rotation distortion on visual comfort.As a result,the rotation distortions of3D displays must remain within0.72°.