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The formation of visual objects

视觉对象的形成

基本信息

批准号：
7194202
负责人：
JACOB FELDMAN
金额：
$ 21.69万
依托单位：
RUTGERS, THE STATE UNIV OF N.J.
依托单位国家：
美国
项目类别：
财政年份：
2005
资助国家：
美国
起止时间：
2005-04-01 至 2010-03-31
项目状态：
已结题

项目摘要

DESCRIPTION (provided by applicant): Perceptual grouping is the process by which the initially raw and inchoate visual image is organized into perceptual "objects". What spatial factors induce perceptual grouping? What is the sequence of computations whereby the image is progressively organized? One source of difficulty in modeling this process is that, unlike many aspects of early vision, perceptual grouping inherently involves non-local: computations - integration of cues from potentially distant locations in the image. Another difficulty in understanding perceptual grouping has been the lack of objective and temporally precise methods for actually measuring the observer's subjective organization of an image. This proposal seeks to combine (a) recent advances in understanding the non-local computations involved in perceptual grouping with (b) novel experimental methods for determining subjective organization. The experimental methods are based on the finding that perceptual objects enjoy certain objectively measurable benefits, including more efficient visual comparisons within them than between distinct objects. This proposal seeks to use this effect to discover what the visual system in fact treats as a perceptual object, and how this percept develops over the course of processing. Most of the proposed experiments involve carefully constructed artificial stimuli with various grouping cues in force, designed to allow detailed comparisons of the strength, interaction, and time-course of each potential grouping cue. In addition, several experiments involve natural images, in order to uncover how perceptual organization proceeds under more naturalistic conditions. This research may lead to technological advancement in the area of computer vision, as well as to better understanding of disorders of perceptual organization such as visual agnosia and dyslexia.

描述（由申请人提供）：感知分组是将最初的原始和早期视觉图像组织成感知“对象”的过程。哪些空间因素会引起知觉分组？逐步组织图像的计算顺序是什么？对该过程进行建模的困难来源之一是，与早期视觉的许多方面不同，感知分组本质上涉及非局部：计算 - 来自图像中潜在遥远位置的线索的整合。理解感知分组的另一个困难是缺乏客观且时间上精确的方法来实际测量观察者对图像的主观组织。该提案旨在将（a）理解感知分组中涉及的非局部计算的最新进展与（b）用于确定主观组织的新颖实验方法结合起来。实验方法基于这样的发现：感知对象享有某些客观可测量的好处，包括它们内部比不同对象之间更有效的视觉比较。该提案试图利用这种效应来发现视觉系统实际上将什么视为感知对象，以及这种感知在处理过程中如何发展。大多数拟议的实验都涉及精心构建的人工刺激，以及各种有效的分组线索，旨在允许对每个潜在分组线索的强度、相互作用和时间过程进行详细比较。此外，一些实验涉及自然图像，以揭示感知组织在更自然的条件下如何进行。这项研究可能会导致计算机视觉领域的技术进步，以及更好地理解视觉失认症和阅读障碍等知觉组织疾病。