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Non-retinotopic Mechanisms of Dynamic Form Perception in Human Vision

人类视觉动态形式感知的非视网膜专题机制

基本信息

批准号：
7895582
负责人：
HALUK OGMEN
金额：
$ 25.65万
依托单位：
UNIVERSITY OF HOUSTON
依托单位国家：
美国
项目类别：
财政年份：
2009
资助国家：
美国
起止时间：
2009-08-01 至 2011-07-31
项目状态：
已结题

项目摘要

DESCRIPTION (provided by applicant): The perception of form is one of the most basic functions of the visual system. Because motion and dynamic occlusions are ubiquitous in our environment, understanding how the human visual system computes the form of moving objects in the presence of occlusions is a fundamental problem in vision science. An analysis of dynamic aspects of vision shows that non-retinotopic computational principles and mechanisms are needed to compute the form of moving objects. We designate as "non-retinotopic" those mechanisms that can generate perception of form in the absence of a retinotopic image. Indeed, perceptual data demonstrate that a retinotopic image is neither necessary nor sufficient for the perception of form. The broad long-term objective of this research is to elucidate the mechanisms underlying visual form perception under its natural dynamic conditions. In particular, we want to characterize non-retinotopic computational principles and mechanisms that allow the visual system to compute the form of moving objects. We hypothesize that a synergy between masking, perceptual grouping, and motion estimation mechanisms can provide a unified visual processing framework that can be applied to natural dynamic viewing conditions. We will address the following two specific aims. Specific Aim 1: Elucidate non-retinotopic mechanisms of dynamic form perception by using anorthoscopic perception. Anorthoscopic perception provides a clear demonstration of the existence of non- retinotopic mechanisms. Do such mechanisms also contribute to dynamic perception in the absence of occlusions? By using a stimulus paradigm, known as the Ternus-Pikler display, we have recently discovered a new illusion that shows non-retinotopic feature perception for moving objects in the absence of occlusions. We will use this paradigm to generalize non-retinotopic mechanisms to dynamic vision: Specific Aim 2: Elucidate the role of non-retinotopic mechanisms in dynamic form perception in the absence of occlusions by using variants of Ternus-Pikler displays. PUBLIC HEALTH RELEVANCE: The proposed studies are expected to improve our understanding of how the human visual system works. This understanding can be instrumental in diagnosing, treating disorders of the visual system in particular, and the nervous system in general.

描述（由申请人提供）：对形式的感知是视觉系统最基本的功能之一。由于运动和动态遮挡在我们的环境中无处不在，因此了解人类视觉系统如何在存在遮挡的情况下计算移动对象的形式是视觉科学中的一个基本问题。视觉的动态方面的分析表明，非retinotopic计算的原则和机制，需要计算移动物体的形式。我们将那些可以在没有视网膜定位图像的情况下产生形式感知的机制指定为“非视网膜定位”。事实上，感知数据表明，视网膜图像既不是必要的，也不足以感知的形式。本研究的长期目标是阐明自然动态条件下视觉形式感知的机制。特别是，我们要表征非retinotopic计算的原则和机制，使视觉系统计算的形式移动的物体。我们假设掩蔽，感知分组和运动估计机制之间的协同作用可以提供一个统一的视觉处理框架，可以应用于自然的动态观看条件。我们将处理以下两个具体目标。具体目标1：阐明非retinotopic机制的动态形式知觉，使用anorthoscopic知觉。非正视知觉提供了非视网膜定位机制存在的明确证明。在没有遮挡的情况下，这些机制是否也有助于动态感知？通过使用刺激范例，被称为Ternus-Pikler显示器，我们最近发现了一种新的错觉，显示了在没有遮挡的情况下对移动物体的非retinotopic特征感知。我们将使用这种范式来概括非retinotopic机制的动态视觉：具体目标2：阐明的作用，非retinotopic机制在动态形式感知的情况下，通过使用Ternus-Pikler显示器的变体闭塞。公共卫生相关性：拟议的研究有望提高我们对人类视觉系统如何工作的理解。这种理解可以有助于诊断，治疗视觉系统疾病，特别是神经系统疾病。