Contrast and phase combination in binocular vision.-猫眼课题宝

双目视觉中的对比度和相位组合

DOI：

10.1371/journal.pone.0015075

发表时间：

2010-12-09

期刊：

PloS one

影响因子：

3.7

通讯作者：

中科院分区：

综合性期刊3区

文献类型：

作者：

Huang CB;Zhou J;Zhou Y;Lu ZL

来源链接：

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3000330/?report=classic

背景视觉系统如何结合来自双眼的信息以形成对外部世界的统一的双目表征是视觉科学中的一个基本问题，也是许多心理、物理和生理研究的焦点。Ding&Sperling(2006)测量了圆形图像的感知相位，并发展了一个双目组合模型，其中每只眼睛对另一只眼睛的信号施加增益控制，并对另一只眼睛的增益控制。关键的是，单目正弦波的相对相位起着核心作用。方法/主要发现我们使用丁-斯珀林范式，但在380种基本对比度、眼间对比度、探头的眼来源和眼间位相差的组合中测量睫状肌图像的感知对比度和相位。我们发现，圆形图像的感知对比度与两个单目光栅的相对相位无关，尽管感知的相位取决于单目图像的相对相位和对比度。我们提出了一种新的多路径对比度-增益控制模型(MCM)，该模型从两个方面详细阐述了Ding-Sperling双目组合模型：(1)尽管具有共享的对比度-增益控制，但在不同的路径上计算单目图像的相位和对比度；(2)在双目对比度组合中使用来自两个单目图像的相位独立的局部能量。通过三个自由参数，该模型可以很好地解释所有实验条件下的数据。结论/意义：双目相位组合取决于单目图像的相对相位和对比度，但双目对比度组合是相位不变的。我们的发现表明，在双眼组合中，至少有两条独立的通路参与其中。

Background How the visual system combines information from the two eyes to form a unitary binocular representation of the external world is a fundamental question in vision science that has been the focus of many psychophysical and physiological investigations. Ding & Sperling (2006) measured perceived phase of the cyclopean image, and developed a binocular combination model in which each eye exerts gain control on the other eye's signal and over the other eye's gain control. Critically, the relative phase of the monocular sine-waves plays a central role. Methodology/Principal Findings We used the Ding-Sperling paradigm but measured both the perceived contrast and phase of cyclopean images in three hundred and eighty combinations of base contrast, interocular contrast ratio, eye origin of the probe, and interocular phase difference. We found that the perceived contrast of the cyclopean image was independent of the relative phase of the two monocular gratings, although the perceived phase depended on the relative phase and contrast ratio of the monocular images. We developed a new multi-pathway contrast-gain control model (MCM) that elaborates the Ding-Sperling binocular combination model in two ways: (1) phase and contrast of the cyclopean images are computed in separate pathways, although with shared cross-eye contrast-gain control; and (2) phase-independent local energy from the two monocular images are used in binocular contrast combination. With three free parameters, the model yielded an excellent account of data from all the experimental conditions. Conclusions/Significance Binocular phase combination depends on the relative phase and contrast ratio of the monocular images but binocular contrast combination is phase-invariant. Our findings suggest the involvement of at least two separate pathways in binocular combination.