Temporal modulation sensitivity and pulse-detection thresholds for chromatic and luminance perturbations.
Temporal modulation sensitivity and pulse-detection thresholds for chromatic and luminance perturbations.
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DOI：
10.1364/josaa.4.001992
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发表时间：
1987-10
期刊：
影响因子：
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通讯作者：
W. Swanson;T. Ueno;V. Smith;J. Pokorny
中科院分区：
文献类型：
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作者：
W. Swanson;T. Ueno;V. Smith;J. Pokorny
我们研究了600 nm场的色度和亮度扰动的时间处理，测量了平均亮度为0.9至900 Td，场大小为0.5度至8度时的调制灵敏度（正弦频率为0.25至40 Hz）和脉冲检测阈值（脉冲持续时间为5至2560毫秒）。彩色刺激是由异色闪烁光度法匹配的光的反相位调制产生的。平均亮度和视场大小都影响灵敏度，且视场大小的影响程度随平均亮度的增加而增加。利用调制灵敏度数据，我们推导出了每组实验条件下的亮度和色度脉冲响应函数。在高平均亮度和大视场尺寸下，色脉冲响应函数是复杂的，这表明色和亮度机制都有贡献。脉冲检测数据通过基于这些脉冲响应函数的峰值检测器模型进行拟合。
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.