Shevell Steven K, Cao Dingcai
Department of Psychology, University of Chicago, 940 East 57th Street, Chicago, IL 60637, USA.
Vision Res. 2006 Jan;46(1-2):106-16. doi: 10.1016/j.visres.2005.06.020. Epub 2005 Aug 10.
Chromatic assimilation is the shift in color appearance toward nearby light. Assimilation was measured using nearby light with time-varying chromaticity. This light induced time-varying assimilation within the test area. Assimilation was quantified by the amplitude of temporally varying test-area light--in counter-phase to the induced assimilation--required to null the assimilation. Unlike previous studies of assimilation, observers here judged only the steadiness of the test area, not its color. The inducing light was varied in luminance, temporal frequency and chromaticity. The measured assimilation could not be explained by only optical factors affecting receptoral quantal absorption. This implies a neural process contributes to assimilation. The nulling measurements showed also that assimilation was not induced independently within the L/M- and S-cone pathways.
颜色同化是颜色外观向附近光线的偏移。使用具有随时间变化色度的附近光线来测量同化。这种光线在测试区域内诱导出随时间变化的同化。通过与诱导同化呈反相的、使同化抵消所需的随时间变化的测试区域光线的幅度来量化同化。与以往的同化研究不同，这里的观察者只判断测试区域的稳定性，而不是其颜色。诱导光在亮度、时间频率和色度方面有所变化。所测量的同化不能仅由影响感受器量子吸收的光学因素来解释。这意味着神经过程对同化有贡献。抵消测量还表明，在L/M和S锥体通路中，同化不是独立诱导的。
