Flitcroft D I
University Laboratory of Physiology, Oxford, England.
Vision Res. 1989;29(3):349-60. doi: 10.1016/0042-6989(89)90083-7.
It has long been recognised that chromatic aberration can introduce luminance artifacts into nominally isoluminant colour stimuli. In this study the effects of chromatic aberration (along with those of defocus and stimulus spatial frequency) on the chromaticity of the retinal image are considered. Such optical effects have important methodological and functional implications for visual physiology. The "Silent Substitution" principle is a fundamental feature of modern colorimetry, being employed in both psychophysical and electrophysiological approaches to the visual system. The theoretical colour spaces introduced by MacLeod and Boynton (1979) and Derrington et al. (1984) are also ultimately based on this principle. All such applications of the silent substitution principle are sensitive to the optical effects of chromatic aberration, defocus, spatial frequency and stimulus chromaticity. The spatial acuity of the mechanisms of colour vision are appreciably lower than those of the luminance system (Mullen, 1985). In addition chromatic aberration has been shown to be a cue to ocular accommodation (Fincham, 1951). The analysis presented in this study suggests a possible explanation for these findings in terms of the ecological and computational constraints placed on the visual system by chromatic aberration.
长期以来，人们已经认识到色差会将亮度伪像引入名义上等亮度的颜色刺激中。在本研究中，考虑了色差（以及散焦和刺激空间频率的影响）对视网膜图像色度的影响。这种光学效应在视觉生理学方面具有重要的方法学和功能意义。“无声替代”原则是现代色度学的一个基本特征，在视觉系统的心理物理学和电生理学方法中都有应用。MacLeod和Boynton（1979年）以及Derrington等人（1984年）引入的理论颜色空间最终也是基于这一原则。无声替代原则的所有此类应用都对色差、散焦、空间频率和刺激色度的光学效应敏感。颜色视觉机制的空间敏锐度明显低于亮度系统（Mullen，1985年）。此外，色差已被证明是眼睛调节的一个线索（Fincham，1951年）。本研究中的分析提出了一个可能的解释，从色差对视觉系统施加的生态和计算限制方面来解释这些发现。
