SHAPE REPRESENTATION AND MULTIPLE DEPTH CUES

形状表示和多深度提示

• 批准号: 2162142
• 负责人: MICHAEL S LANDY
• 金额: $ 15.61万
• 依托单位: NEW YORK UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-08-01 至 1996-04-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/2162142
• 关键词: cues; form /pattern perception; human subject; mathematical model; neural information processing; psychophysics; vision tests; visual depth perception; visual stimulus

DESCRIPTION (Investigator's Abstract): Biological visual systems make use of multiple depth cues including occlusion, texture, perspective, motion parallax, disparity, shading, and so on. The first of three themes that guide the work proposed here is that an ideal depth observer is sensitive to the quality of information available from different depth cues in a particular scene. The second theme is that the ideal depth observer is sensitive also to the logical type of information (in a measurement-theoretic sense) available from different depth cues. The investigators will argue that depth information of different types must be promoted to a common type before being combined, and this process of promotion may explain many observed depth cue interactions. The third theme concerns the veridicality of stimuli (how closely they resemble 'real world' scenes).If an ideal depth observer is sensitive to the quality of information available from different depth cues, then the use of impoverished or distorted depth stimuli can in itself alter the course of depth processing. The experimental work proposed will make use of hardware and software capable of generating highly realistic, controllable viewing conditions involving large displays, observer motion, and accurately modeled scene and surface properties. The experimental methods used are based on perturbation analysis methods that permit analysis of a system that can potentially react to distortions and inconsistencies in stimuli. The proposed research consists of four major tasks. (1) The investigators will test the general applicability of a particular model of cue combination, the linear model, which the investigators have previously demonstrated for combinations of texture, motion and stereo. This will involve estimation of depth using additional depth cues as well as applications to other tasks including determination of absolute spatial location and 2D feature localization. (2) The investigators will examine whether the human depth combination rule is statistically robust in the sense of discounting cues that indicate depth values discrepant from other cues. (3) Exploration of the time course and limits of cue calibration for absolute depth will be carried out using rich 3D displays and an open-loop pointing task. (4) Experiments will probe the forms of depth representation used by human observers.

描述（研究者的摘要）：生物视觉系统使 使用多个深度线索，包括遮挡，纹理，透视图， 运动视差，差异，阴影等。 三个 指导这里提出的工作的主题是理想的深度观察者 对不同深度可用的信息质量敏感 在特定场景中提示。 第二个主题是理想的深度 观察者对逻辑类型的信息也很敏感（在 测量理论意义）可从不同的深度线索获得。 这 调查人员会争辩说，不同类型的深度信息必须 在合并之前将其晋升为普通类型，这一过程 晋升可以解释许多观察到的深度提示相互作用。 第三 主题涉及刺激的垂直性（它们相似程度 “现实世界”场景）。如果理想的深度观察者对 来自不同深度线索的信息质量，然后使用 贫困或扭曲的深度刺激本身可以改变路线 深度处理。 提议的实验工作将利用硬件和软件 能够产生高度现实，可控制的观看条件 涉及大型显示器，观察者运动和精确建模的场景 和表面特性。 使用的实验方法基于 允许对系统的分析的扰动分析方法 潜在地对刺激中的扭曲和不一致反应。 这 拟议的研究包括四个主要任务。 （1）调查人员 将测试特定的提示模型的一般适用性 组合，线性模型，研究人员以前拥有 展示了纹理，运动和立体声的组合。 这会 使用其他深度线索涉及深度估算以及 申请其他任务，包括确定绝对空间 位置和2D功能本地化。 （2）调查人员将检查 人类深度组合规则在统计上是否在 表示深度值差异的折现意识 其他提示。 （3）探索时间课程和提示限制 将使用丰富的3D显示器进行绝对深度的校准 和开环指向任务。 （4）实验将探测 人类观察者使用的深度表示。