MECHANISMS OF LIGHTNESS PERCEPTION

描述(改编自申请人的摘要)：建议的研究将 有助于理解人类的轻盈感知。最近的工作是 光的感知表明，许多现象可以在 锚定和知觉分组的术语。其基本思想是：(1) 场景的亮度分布用于锚定和缩放局部亮度 测量到特定的亮度贴图。(2)感知分组 亮度块建立影响空间权重的边界 明度贴图的方案。调查人员将在 用于测试现有模型的亮度感知，以帮助将概念形式化 锚定和分组，并确定模型可以如何修改或 进行了改进，以解释更广泛的现象。锚定 问题在“大气”的框架中进行了概念性的重塑。这种方法 寻求从亮度估计照明和观看条件参数 统计数据和配置，以便在映像之间建立映射 亮度和可感知的反射率。拟议的实验将使用 计算机生成的和物理刺激以测量在 条件多种多样。刺激物将在传统显示器上进行测试 并在允许控制所有图像的特殊设计的全景显示器中 亮度值。锚定实验将调查统计方面的 在确定亮度贴图时至关重要的亮度分布。 分组实验将测试特定结点和 轮廓配置在建立明度感知的边界方面。 更多的实验将调查自然主义线索在 每天的场景，以确定有助于 轻盈的感觉。这些调查的结果应该令人感兴趣。 给研究人员在亮度、色彩和感知组织方面的优势。

DESCRIPTION (Adapted From The Applicant's Abstract): The proposed research will contribute to the understanding of human lightness perception. Recent work on lightness perception has suggested that many phenomena may be understood in terms of anchoring and perceptual grouping. The essential ideas are: (1) The luminance distribution of a scene serves to anchor and scale local luminance measurements into a particular lightness mapping. (2) Perceptual grouping of luminance patches establishes boundaries that affect the spatial weighting scheme of the lightness mapping. The investigators will perform experiments on lightness perception to test the existing models, to help formalize the notions of anchoring and grouping, and to determine how models may be modified or improved in order to account for a wider range of phenomena. The anchoring problem is conceptually recast in a framework of "atmospheres." This approach seeks to estimate lighting and viewing condition parameters from luminance statistics and configurations in order to establish mappings between image luminances and perceived reflectances. The proposed experiments will employ computer-generated and physical stimuli to measure lightness mappings under a wide variety of conditions. Stimuli will be tested both in traditional displays and in specially-designed panoramic displays that permit control of all image luminance values. Anchoring experiments will investigate statistical aspects of luminance distributions that are critical in determining the lightness mapping. Grouping experiments will test the importance of particular junction and contour configurations in establishing boundaries for lightness perception. Additional experiments will investigate the effects of naturalistic cues in everyday scenes in order to identify further mechanisms that contribute to lightness perception. The results of these investigations should be of interest to researchers in lightness, color, and perceptual organization.