Swanson W H, Ueno T, Smith V C, Pokorny J
Eye Research Laboratories, University of Chicago, Illinois 60637.
J Opt Soc Am A. 1987 Oct;4(10):1992-2005. doi: 10.1364/josaa.4.001992.
We studied temporal processing of chromatic and luminance perturbations of a 600-nm field, measuring both modulation sensitivity (sinusoidal frequencies from 0.25 to 40 Hz) and pulse-detection thresholds (pulse durations from 5 to 2560 msec) for mean luminances of 0.9 to 900 Td and field sizes of 0.5 degrees to 8 degrees. Chromatic stimuli were produced by antiphase modulation of lights matched by heterochromatic flicker photometry. Both mean luminance and field size affected sensitivity, and the magnitude of field-size effects increased with mean luminance. We derived both luminance and chromatic impulse response functions for each set of experimental conditions, using the modulation-sensitivity data. At high mean luminances and large field sizes the chromatic impulse response functions are complex, suggesting contributions from both chromatic and luminance mechanisms. Pulse-detection data were fitted by a peak detector model based on these impulse response functions.
我们研究了600纳米场的色度和亮度扰动的时间处理，测量了0.9至900特熙提（Td）的平均亮度以及0.5度至8度的视场大小下的调制灵敏度（正弦频率从0.25至40赫兹）和脉冲检测阈值（脉冲持续时间从5至2560毫秒）。色度刺激是通过异色温闪烁光度法匹配的光的反相调制产生的。平均亮度和视场大小均影响灵敏度，且视场大小效应的幅度随平均亮度增加。我们使用调制灵敏度数据为每组实验条件推导了亮度和色度脉冲响应函数。在高平均亮度和大视场大小下，色度脉冲响应函数很复杂，表明色度和亮度机制均有贡献。基于这些脉冲响应函数，脉冲检测数据由一个峰值检测器模型拟合。
