利用互补融合外部噪声研究人眼视觉的双目叠加

Christopher Howell, Jeffrey T. Olson
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引用次数: 0

摘要

噪声对人类视觉系统各个阶段的视觉信息处理的影响仍然是一个开放的研究领域。为了获得更多的见解,使用正弦波目标对人类观察者进行了12次实验,以确定其对比度阈值。采用单帧加性高斯白噪声(AWGN)及其补充,研究了噪声对HVS内视觉信息叠加的影响。标准对比阈值实验作为比较的基线。在标准实验中,向观察者展示一系列正弦波目标,并记录他们在不同对比度水平下检测目标的能力。其余的实验添加了某种形式的噪声(噪声图像或其补充)和/或一个额外的正弦波目标,在测试目标之间间隔一到三个八度。所有这些实验都使用单个监视器来观察目标或使用双监视器呈现方法进行比较。在双监视器实验中,一个90度的镜子被用来将每个目标指向不同的眼睛,允许信息在双目融合。本研究中的实验提出了将外部噪声传递到HVS的不同方法,并且应该允许对噪声如何进入HVS以及噪声对视觉信息处理的影响有更好的理解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Investigating binocular summation in human vision using complementary fused external noise
The impact noise has on the processing of visual information at various stages within the human visual system (HVS) is still an open research area. To gain additional insight, twelve experiments were administered to human observers using sine wave targets to determine their contrast thresholds. A single frame of additive white Gaussian noise (AWGN) and its complement were used to investigate the effect of noise on the summation of visual information within the HVS. A standard contrast threshold experiment served as the baseline for comparisons. In the standard experiment, a range of sine wave targets are shown to the observers and their ability to detect the targets at varying contrast levels were recorded. The remaining experiments added some form of noise (noise image or its complement) and/or an additional sine wave target separated between one to three octaves to the test target. All of these experiments were tested using either a single monitor for viewing the targets or with a dual monitor presentation method for comparison. In the dual monitor experiments, a ninety degree mirror was used to direct each target to a different eye, allowing for the information to be fused binocularly. The experiments in this study present different approaches for delivering external noise to the HVS, and should allow for an improved understanding regarding how noise enters the HVS and what impact noise has on the processing of visual information.
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