TESTING A COMPUTATIONAL MODEL OF LIGHT-ADAPTATION DYNAMICS

被引:26
|
作者
VONWIEGAND, TE [1 ]
HOOD, DC [1 ]
GRAHAM, N [1 ]
机构
[1] COLUMBIA UNIV, DEPT PSYCHOL, NEW YORK, NY 10027 USA
关键词
COMPUTATIONAL MODEL; LIGHT ADAPTATION; FLICKER THRESHOLD; PROBE-FLASH; STIMULUS-ONSET ASYNCHRONY;
D O I
10.1016/0042-6989(95)00047-4
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
Experiments from the periodic and aperiodic traditions were used to guide the development of a quantitatively valid model of light adaptation dynamics. Temporal contrast sensitivity data were collected over a range of 3 log units of mean luminance for sinusoids of 2 to 50 Hz. Probe thresholds on flashed backgrounds were collected over a range of stimulus-onset asynchronies and background intensities from 0.1 to 1000 td. All experiments were performed foveally in the photopic range and used a consistent stimulus paradigm and psychophysical method. The resulting model represents a merging of elements from both traditions, and consists of a frequency-dependent front-end followed by a subtractive process and static nonlinearity.
引用
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页码:3037 / 3051
页数:15
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