VISUAL INTERPOLATION IN SPATIOTEMPORAL CHANNELS

时空通道中的视觉插值

• 批准号: 3261465
• 负责人: MARC A GREEN
• 金额: $ 3.21万
• 依托单位: YORK UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 1984
• 资助国家: 美国
• 起止时间: 1984-09-20 至 1987-04-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/3261465
• 关键词: biological models; human subject; neural information processing; perceptual maskings; psychophysics; sequential perception; vision tests; visual feedback

When an object is moved discontinuously (apparent motion) across space, the observer may perceive a smooth motion. The target appears to momentarily occupy locations at each point in the motion path, although it is physically present at only a few. For this to occur, the visual system must interpolate and fill-in between the static location. The proposed research will investigate the interpolation process in 3 cases of experiments; 1) discrimination of continuous and continuous motion, 2) vernier offset, and 3) stereo disparity. The first aim is to evaluate a model of interpolation based on sampling theory. This model suggests that discontinuous (sampled) motion of a target results in replication of its spatiotemporal spectrum. Perception of smooth motion will result when these replicas are eliminated by the visual filtering. Validity of this model will be tested with a new variety of discontinuous motion. The second goal is to determine the effects of spatial frequency composition of interpolation. Interpolation will be investigated with stiumuli containing simple and complex spectra. The relationship between interpolation filters and previously described spatial frequency, temporal frequency and orientation/motion direction channels will be determined. Lastly, the effects of retinal locus on interpolation will be determined.

当一个物体在空间中不连续地(明显的运动)移动时， 观察者可以感觉到一个平稳的运动。目标似乎暂时 占据运动路径中每个点的位置，尽管它是 身体上只有几个人在场。要做到这一点，视觉系统 必须在静态位置之间插入和填充。建议数 研究将调查三种情况下的插补过程 实验：1)连续运动和连续运动的区分，2) 游标偏移，以及3)立体声视差。第一个目标是评估一个 基于采样理论的插补模型。这个模型表明 目标的不连续(采样)运动会导致复制其 时空光谱。在以下情况下会产生流畅的运动感觉 这些复制品通过视觉过滤被去除。这一点的有效性 模型将用一种新的不连续运动进行测试。这个 第二个目标是确定空间频率组成的影响 插补。插值法的研究对象是包含 简单和复杂的光谱。内插滤波之间的关系 以及先前描述的空间频率、时间频率和 将确定方向/运动方向通道。最后， 将确定视网膜位置对内插的影响。