Spehar B, Debonet J S, Zaidi Q
SUNY College of Optometry, NY 10010, USA.
Vision Res. 1996 Jul;36(13):1893-906. doi: 10.1016/0042-6989(95)00255-3.
We studied the brightness induced from complex non-figural achromatic surrounds. A spatially uniform test field was surrounded by a random texture composed of two sets of dots. The luminance of each set of dots was modulated sinusoidally at 0.5 Hz. The mean luminance, phase and amplitude of modulation of each set were controlled independently so as to modulate the luminance and/or the contrast of the surround. Brightness induction was measured by a modulation nulling technique. The results were fit by a model in which the total brightness induced by a surround is equal to a weighted spatial summation of the induced effects from each point in the surround. The model incorporates local luminance gain controls in the test and surround fields and assumes that the magnitude of induction from each surround element is gain controlled by the difference between the mean luminance of the test and the individual surround elements.
我们研究了由复杂的非图形消色差背景诱导产生的明度。一个空间均匀的测试场被由两组点组成的随机纹理所包围。每组点的亮度以0.5赫兹的频率进行正弦调制。每组的平均亮度、调制相位和幅度被独立控制，以便调制背景的亮度和/或对比度。通过调制归零技术测量明度诱导。结果由一个模型拟合，该模型中背景诱导产生的总明度等于背景中每个点的诱导效应的加权空间总和。该模型在测试场和背景场中纳入了局部亮度增益控制，并假设来自每个背景元素的诱导幅度由测试场的平均亮度与各个背景元素之间的差异进行增益控制。
