MECHANISMS OF LIGHTNESS PERCEPTION

描述（改编自申请人摘要）：拟议的研究将 有助于理解人类的亮度感知。最近的工作 亮度感知表明，许多现象可以理解， 锚定和感知分组的术语。基本思想是：（1） 场景的亮度分布用于锚和缩放局部亮度 将测量值转换为特定的亮度映射。(2)知觉分组 亮度面片建立影响空间权重的边界 亮度映射的方案。研究人员将进行实验 亮度感知来测试现有的模型，以帮助形式化的概念， 锚定和分组，并确定如何修改模型， 为了解释更广泛的现象，我们进行了改进。锚固 这个问题在概念上被重新定义在“大气层”的框架中。“这种做法 试图从亮度估计照明和观看条件参数 统计数据和配置，以便在图像之间建立映射 亮度和感知反射率。拟议的实验将采用 计算机生成的和物理刺激，以测量亮度映射下， 各种各样的条件。刺激将在传统的显示器和 以及在允许控制所有图像的专门设计的全景显示器中 亮度值。验证实验将调查统计方面的 亮度分布在确定亮度映射中至关重要。 实验将测试特定连接的重要性， 轮廓配置在建立亮度感知的边界。 另外的实验将调查自然主义线索在 日常场景，以确定有助于 亮度感知这些调查的结果应该引起人们的兴趣 亮度、颜色和知觉组织的研究者。

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.