贡献演讲III:在搜索自然场景时获得的表面颜色信息
David Howard Foster1, Kinjiro Amano1
1University of Manchester, UK.
Journal of vision
|April 11, 2025
概括
在复杂的自然场景中,目光的行为优先从不同的反射元素中获取信息,由反射的颜色驱动. 这种视觉搜索策略提供了比随机采样更多的信息,与光谱多样性相关.
科学领域:
- 视觉感知 视觉感知 视觉感知
- 生态心理学 生态心理学
- 计算神经科学是一种计算神经科学.
背景情况:
- 自然场景具有复杂的空间和光谱特征.
- 基于对象突出性的视觉搜索的传统模型可能无法完全解释这些环境中的目光行为.
- 一个替代假设表明,视线行为旨在提取有关不同反射元素的信息,这些元素以它们的光谱特性为特征.
研究的目的:
- 调查自然场景中眼睛固定所获得的信息是否与场景的光谱多样性有关.
- 为了比较从人类眼睛固定获得的信息与随机抽样.
- 探索反射颜色在视觉搜索行为中的作用.
主要方法:
- 七名观察员在20个自然户外场景中寻找一个中立的目标.
- 记录了眼睛的固定,并根据反射的光谱辐射和圆光感受器刺激估计了信息.
- 来自固定的信息估计与每个场景中的随机抽样点的信息估计进行了比较.
主要成果:
- 在20个场景中的16个场景中,眼睛固定产生了比随机抽样更多的信息.
- 获取信息的比例在很大程度上独立于光感应器噪声.
- 每个场景中的信息获取与颜色度 (光谱多样性的衡量标准) 呈正共变.
结论:
- 在自然场景中的眼睛运动可以遵循最大限度地获取关于光谱属性的信息的原则.
- 反映光谱多样性的颜色是影响视觉搜索过程中获取信息的关键因素.
- 基于光谱特征的信息获取为视觉搜索的面向对象解释提供了潜在的基础.
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