基于深度感知和运动感知的立体视觉舒适度研究

发布时间：2018-06-28 12:34

本文选题：立体显示技术 + 立体视觉舒适度　；参考：《天津大学》2016年博士论文

【摘要】：立体技术(3D Technology)可以带给人以身临其境的感觉,在许多领域中得到了广泛的应用。但是,迄今为止的一些立体产品不可避免地会带给人不舒适感,这些不足已成为制约立体技术和产业发展的主要瓶颈。因此,开展立体视觉舒适度研究具有至关重要的意义和价值。本文主要从深度感知和运动感知两个方面对影响立体视觉舒适度的因素开展了深入的理论分析和大量的实验研究。本文主要工作内容包括以下几个方面。立体视觉舒适融像问题,是立体显示舒适度研究的关键问题之一。本文提出了立体视觉舒适融合限(Comfortbale Fusion Limits,CFL)的概念,并将立体视觉舒适融合限作为立体视觉舒适融像的评判标准,研究了影响随机点立体图(Random Dot Stereogram,RDS)舒适融合限的因素。通过主观实验研究了不同因素对立体视觉舒适融合限的影响,提出了影响CFL的预测模型。实验结果表明,用所提出的预测模型计算得到的CFL值和实际测量值具有很强的相关性。立体图像的显示景深与人眼生理景深的差异,对舒适观看立体图像具有较大的影响。本文推导了基于瞳孔直径的人眼生理景深(Depth of Field,DOF)视觉模型,首次提出了显示景深与人眼生理景深的差异参数k,并通过实验研究了k对立体视觉舒适度的影响,建立了基于参数k的立体视觉舒适度模型。实验结果表明,瞳孔直径是影响人眼生理景深的关键生理参数;而与瞳孔直径密切相关的差异参数k是评价立体图像观看舒适度的重要指标。对立体图像序列中物体运动状况的感知,会极大地影响观看者的立体感受。本文设计并制作了动态随机点立体图像序列,通过分析序列中物体运动方向、运动速度、运动加速度对立体视觉舒适度的影响,提出了基于深度运动、固定深度平面上的水平运动和垂直运动的三种立体视觉舒适度模型。实验结果表明,基于三种运动模型的计算结果与主观评价结果一致性很高。在时分立体显示技术中,左、右眼图像的时间差会导致观看者感知到的视差和深度发生变化,容易产生视疲劳。基于时分立体显示设备,本文建立了因垂直运动和深度运动导致的视差及深度变化模型,提出了采用运动补偿方式消除视差和深度变化的方法,并利用主观实验验证了所提出模型和方法的有效性。
[Abstract]:Stereoscopic technology (3D technology) has been widely used in many fields. However, up to now, some stereoscopic products inevitably bring people a sense of discomfort, which has become the main bottleneck restricting the development of stereoscopic technology and industry. Therefore, it is of great significance and value to study the comfort of stereoscopic vision. In this paper, the factors affecting the comfort of stereoscopic vision are analyzed theoretically and a lot of experiments are carried out from depth perception and motion perception. The main work of this paper includes the following aspects. The comfortable fusion of stereoscopic vision is one of the key problems in the study of stereoscopic display comfort. In this paper, the concept of comfortbale fusion limit (CFL) is proposed, and the cozy fusion limit of stereoscopic vision is taken as the criterion to judge the fusion of stereo visual comfort. The factors influencing the cozy fusion limit of Random Dot Steregrammogram (RDS) are studied. The influence of different factors on the fusion limit of stereo vision comfort was studied by subjective experiments and the prediction model of CFL was proposed. The experimental results show that there is a strong correlation between the CFL values calculated by the proposed prediction model and the actual measured values. The difference between the display depth of stereoscopic image and the physiological depth of human eye has great influence on the comfortable viewing of stereoscopic image. In this paper, the visual model of depth of field based on pupil diameter is derived, and the difference parameter k between the depth of field and the depth of human eye is proposed for the first time, and the effect of k on the comfort of stereoscopic vision is studied experimentally. A model of stereo vision comfort based on parameter k is established. The experimental results show that pupil diameter is a key physiological parameter affecting the physiological depth of field in human eyes, and the difference parameter k, which is closely related to pupil diameter, is an important index for evaluating the viewing comfort of stereoscopic images. The perception of object motion in stereo image sequence will greatly affect the stereoscopic perception of the viewer. In this paper, the dynamic random spot stereo image sequence is designed and made. By analyzing the effects of the moving direction, velocity and acceleration of the object in the sequence on the stereo vision comfort, the paper puts forward the motion based on depth. Three stereo visual comfort models of horizontal motion and vertical motion on the fixed depth plane. The experimental results show that the calculated results based on the three motion models are in good agreement with the subjective evaluation results. In time division stereoscopic display, the time difference between left and right eye images will lead to the change of parallax and depth perceived by the viewer, which is easy to produce visual fatigue. Based on the time division stereoscopic display equipment, the model of parallax and depth variation caused by vertical motion and depth motion is established, and the method of eliminating parallax and depth variation by motion compensation is proposed. The effectiveness of the proposed model and method is verified by subjective experiments.
【学位授予单位】：天津大学
【学位级别】：博士
【学位授予年份】：2016
【分类号】：TP391.41

【相似文献】