Correct focus cues in stereoscopic displays improve 3D depth perception
Correct focus cues in stereoscopic displays improve 3D depth perception
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立体显示器中的正确焦点提示可改善 3D 深度感知
DOI：
10.1117/2.1201007.003109
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
H. Hua
中科院分区：
文献类型：
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作者：
H. Hua
人们已经探索了许多不同的3D显示方法，其中大多数是立体的。这些类型的显示器通过从两个略有不同的观看位置呈现3D场景的两个透视图像(每只眼睛一个)来创建深度感知。立体显示已经在一系列应用中主导了这项技术，包括飞行模拟、科学可视化、医学、工程设计、教育和培训以及娱乐系统。例如，透视式头盔显示器将虚拟视图与物理场景融合在一起，使医生能够看到叠加在患者腹部的解剖结构或计算机辅助断层成像图像的3D渲染(见图1)。1近年来，立体显示器有了巨大的发展，实际上推动了3D电影的快速复兴。出于同样的原因，心理物理学研究已经将许多视觉假象与立体显示器的扩展使用联系起来。例如，感知深度的明显扭曲、视觉疲劳、复视以及延迟和减慢的调节反应或远视变化(远视)。2、3一个潜在的原因可能是这些显示中固有的问题，称为调节-会聚差异。在传统的立体显示器中，图像对通常呈现在距离观看者固定距离的2D平面上。眼睛由2D图像提示以适应图像平面所在的固定距离。同时，图像对的双目视差导致眼睛会聚到渲染的3D内容的不同深度。换句话说，在立体显示中，观看真实世界场景时眼睛调节和会聚的自然耦合被打破。此外，与观看自然场景不同，在图1中。医学可视化中增强现实的概念验证演示1
Many different approaches to 3D displays have been explored, most of which are stereoscopic. These kinds of displays create depth perception by presenting two perspective images— one for each eye—of a 3D scene from two slightly different viewing positions. Stereoscopic displays have dominated the technology for a range of applications, including flight simulation, scientific visualization, medicine, engineering design, education and training, and entertainment systems. For instance, a see-through, head-mounted display merges virtual views with physical scenes, enabling a physician to see a 3D rendering of anatomical structures or computer-assisted tomography images superimposed on a patient’s abdomen (see Figure 1).1 Stereoscopic displays have evolved dramatically in recent years and, in fact, have driven the rapid revival of 3D cinema. By the same token, psychophysical studies have associated a number of visual artifacts with extended use of stereoscopic displays. Examples include apparent distortion in perceived depth, visual fatigue, double vision, and delayed and slowed accommodation responses or hyperopic changes (farsightedness).2, 3 One underlying cause may be a problem inherent in these displays known as accommodation-convergence discrepancy. In conventional stereoscopic displays, pairs of images are typically presented on a 2D flat surface at a fixed distance from the viewer. The eyes are cued by the 2D images to accommodate to a fixed distance where the image planes are located. At the same time, the binocular disparity of the image pairs leads the eyes to converge towards different depths of the rendered 3D content. In other words, the natural coupling of eye accommodation and convergence in viewing a real-world scene is broken in stereoscopic displays. Moreover, unlike viewing a natural scene, in a Figure 1. Proof-of-concept demonstration of augmented reality in medical visualization.1