Improvements in 3D Visualization for Vision Research

视觉研究 3D 可视化的改进

• 批准号: 6936515
• 负责人: MARTIN S BANKS
• 金额: $ 22.64万
• 依托单位: UNIVERSITY OF CALIFORNIA BERKELEY
• 依托单位国家: 美国
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-09-15 至 2007-08-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6936515
• 关键词: behavioral /social science research tag; binocular vision; bioengineering /biomedical engineering; clinical research; computer graphics /printing; computer program /software; computer system hardware; cues; digital imaging; eye prosthesis; head movements; human subject; lens; psychophysics; space perception; vision aid; vision tests; visual perception; visual stimulus

DESCRIPTION (provided by applicant): Three-dimensional computer graphics plays a key role in basic research on visual space perception and in numerous applications such as virtual reality. The goal in 3d graphics has been to create the display on a digital display screen that yields the same 2d retinal images as the real 3d scene itself. This can be done stereoscopically by presenting two images on the display screen, one for each eye. The resulting 3d impression can be very compelling. However, the resulting percept is frequently different from that obtained with real scenes and objects. Part, if not all, of the problem can be attributed to inappropriate screen cues that signal the distance to (and shape of' the display screen rather than simulated scene or object. Here we propose to measure the contributions of those screen cues and to develop a novel, multi-focal graphics display system that will circumvent the most problematic of the screen cues. The research effort requires the combined talents of psychophysicists, optical scientists, and computer graphic engineers, so we are requesting funds to put together this collaborative research program. There are four specific aims.1. Measure the influence of digital display cues on perceived 3-dimensionality. We will investigate the contributions of three such cues: a) inappropriate motion parallax during head movements, b) pixelization, and c) inappropriate focus cues.2. Develop an adaptive lens. The requirements are a) high image quality, b) ability to change power by 2 diopters or more, c) frequency response of 180Hz or higher, d) synchronizing lens power changes with the graphic display, and e) small and light enough to be worn by a human observer.3. Develop and evaluate the graphic display algorithm required to simulate focus cues accurately.4. Construct and evaluate the lens and graphical display algorithm. We will test human observers with and without the system in use. We will assess the quality of the resultant in terms of apparent depth, flicker, sharpness, smoothness of motion, and more. We will be particularly interested in using depth-judgment tasks to evaluate the effectiveness of the system in producing more veridical 3d percepts.

描述(申请人提供)：三维计算机图形学在视觉空间感知的基础研究和虚拟现实等众多应用中发挥着关键作用。3D图形的目标一直是在数字显示屏上创建显示，以产生与真实3D场景本身相同的2D视网膜图像。这可以通过在显示屏上呈现两个图像来立体地完成，每只眼睛一个图像。由此产生的3D印象可能会非常引人注目。然而，由此产生的感知往往不同于真实场景和对象所获得的感知。问题的一部分(如果不是全部)可以归因于不适当的屏幕提示，这些提示指示到显示屏的距离(和形状)，而不是模拟的场景或对象。在这里，我们建议测量这些屏幕提示的贡献，并开发一种新型的多焦点图形显示系统，该系统将绕过最有问题的屏幕提示。这项研究工作需要心理物理学家、光学科学家和计算机图形工程师的联合人才，所以我们正在申请资金来组建这个合作研究计划。有四个具体目标1.测量数字显示线索对感知的三维空间的影响。我们将调查三个这样的线索的贡献：a)头部运动过程中不适当的运动视差，b)像素化，c)不适当的焦点线索。开发一种自适应镜头。要求是a)高图像质量，b)能够改变2个或更多屈光度，c)180赫兹或更高的频率响应，d)与图形显示同步镜头强度变化，以及e)足够小和足够轻，以供人类观察者佩戴。开发和评估准确模拟焦点提示所需的图形显示算法。构建并评估了镜头和图形显示算法。我们将在使用和不使用该系统的情况下测试人类观察者。我们将从外观深度、闪烁、锐度、运动的流畅性等方面来评估结果的质量。我们将特别感兴趣的是使用深度判断任务来评估该系统在产生更真实的3D感知方面的有效性。