Wook Hong Sang, Shevell Steven K
Department of Psychology, Visual Science Laboratories, University of Chicago, 940 East 57th Street, Chicago, IL 60637, USA.
Vision Res. 2004 Jan;44(1):35-43. doi: 10.1016/j.visres.2003.07.010.
Theories of induction propose that the brightness of a test patch within a complex surround is explained by local contrast or by integrating contrasts from various regions within the surround, weighted inversely with the distance from the test. Results here corroborate that brightness induction from a patterned background depends on both contiguous and non-contiguous surrounding light, but the measurements were inconsistent with any linear integration of contrast at edges within the scene. In some conditions, assimilation rather than contrast to contiguous surrounding light was observed, depending on the luminance of the light in non-contiguous regions. This finding implies that brightness induction from patterned backgrounds depends on neural processes that can cause contrast and/or assimilation, depending on the luminance relation between contiguous and non-contiguous regions. A model in the literature postulating that the influence of a non-contiguous edge is regulated by the amount of contrast at the contiguous edge can accommodate brightness induced by these patterned backgrounds.
归纳理论提出，复杂背景中测试斑块的亮度可通过局部对比度或整合背景内不同区域的对比度来解释，权重与到测试点的距离成反比。此处的结果证实，来自图案背景的亮度诱导取决于相邻和不相邻的周围光线，但测量结果与场景边缘对比度的任何线性整合不一致。在某些条件下，观察到的是同化而非与相邻周围光线的对比度，这取决于不相邻区域光线的亮度。这一发现意味着，来自图案背景的亮度诱导取决于神经过程，该过程可根据相邻和不相邻区域之间的亮度关系导致对比度和/或同化。文献中的一个模型假设，不相邻边缘的影响由相邻边缘的对比度大小调节，该模型可以解释这些图案背景所诱导的亮度。
