Shevell S K, Wei J
Department of Psychology, University of Chicago, IL 60637, USA.
Vision Res. 1998 Jun;38(11):1561-6. doi: 10.1016/s0042-6989(98)00006-6.
Chromatic induction from a surrounding light is measured with an additional remote field outside the surround. Chromatic induction from the surround into a central test field is found to be attenuated by a remote inhomogeneous 'checkerboard', composed of squares at two different chromaticities. A uniform remote field, on the other hand, either at the average or at the most extreme chromaticity of the 'checkerboard', has a weaker effect on chromatic induction than the inhomogeneous field, implying that chromatic contrast within the remote region is a critical factor. The complete set of experiments is accounted for by chromatic contrast gain control: chromatic induction, mediated by a neural signal for contrast at the edge of the test, is attenuated by contrast within the remote region. A contrast gain control set by variation in chromaticity over a broad area can contribute to the stable color appearance of surfaces embedded within complex scenes by minimizing chromatic induction from locally adjacent regions.
通过在周围环境之外增加一个远程场来测量来自周围光的色诱导。发现来自周围环境进入中央测试场的色诱导会被一个由两种不同色度的方块组成的远程不均匀“棋盘”减弱。另一方面，一个均匀的远程场，无论是处于“棋盘”的平均色度还是最极端色度，对色诱导的影响都比不均匀场弱，这意味着远程区域内的色对比度是一个关键因素。完整的实验集可以用色对比度增益控制来解释：由测试边缘的对比度神经信号介导的色诱导，会被远程区域内的对比度减弱。通过在大面积上改变色度设置的对比度增益控制，可以通过最小化来自局部相邻区域的色诱导，来有助于复杂场景中嵌入表面的稳定颜色外观。
