Improvements in 3D Visualization for Vision Research

视觉研究 3D 可视化的改进

• 批准号: 6794034
• 负责人: MARTIN S BANKS
• 金额: $ 22.68万
• 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 2006-08-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6794034
• 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（由申请人提供）：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 图形的目标是在数字显示屏上创建显示，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（每只眼睛一个）来立体地完成。由此产生的 3D 印象可能非常引人注目。然而，由此产生的感知常常与真实场景和物体所获得的感知不同。部分（如果不是全部）问题可归因于不适当的屏幕提示，这些屏幕提示表示到显示屏的距离（和形状）而不是模拟场景或对象。在这里，我们建议测量这些屏幕提示的贡献并开发一种新颖的多焦点图形显示系统，将规避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共同努力，因此我们正在申请资金来整合这个合作研究项目。具体有四个。 1. 测量数字显示线索对感知 3 维的影响 我们将研究三个此类线索的贡献：a) 头部运动期间不适当的运动视差，b) 像素化，以及 c) 不适当的焦点线索。开发自适应镜头。要求是 a) 高图像质量，b) 能够以 2 屈光度或更多屈光度改变光焦度，c) 180Hz 或更高的频率响应，d) 使镜头光焦度变化与图形显示同步，以及 e) 足够小和轻，以便由人类观察者佩戴。3。开发并评估准确模拟焦点线索所需的图形显示算法。4．构建并评估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。我们将从表观深度、闪烁、清晰度、运动平滑度等方面评估结果的质量。我们将特别感兴趣的是使用深度判断任务来评估系统在产生更真实的 3D 感知方面的有效性。