Otazu Xavier, Parraga C Alejandro, Vanrell Maria
Computer Vision Center, Computer Science Department, Universitat Autònomade Barcelona, Cerdanyola del Vallès, Barcelona, Spain.
J Vis. 2010 Oct 1;10(12):5. doi: 10.1167/10.12.5.
In a previous work (X. Otazu, M. Vanrell, & C. A. Párraga, 2008b), we showed how several brightness induction effects can be predicted using a simple multiresolution wavelet model (BIWaM). Here we present a new model for chromatic induction processes (termed Chromatic Induction Wavelet Model or CIWaM), which is also implemented on a multiresolution framework and based on similar assumptions related to the spatial frequency and the contrast surround energy of the stimulus. The CIWaM can be interpreted as a very simple extension of the BIWaM to the chromatic channels, which in our case are defined in the MacLeod-Boynton (lsY) color space. This new model allows us to unify both chromatic assimilation and chromatic contrast effects in a single mathematical formulation. The predictions of the CIWaM were tested by means of several color and brightness induction experiments, which showed an acceptable agreement between model predictions and psychophysical data.
在之前的一项研究中（X. 奥塔祖、M. 范雷尔和C. A. 帕拉加，2008b），我们展示了如何使用一个简单的多分辨率小波模型（BIWaM）来预测几种亮度诱导效应。在此，我们提出一种用于色觉诱导过程的新模型（称为色觉诱导小波模型或CIWaM），该模型同样在多分辨率框架上实现，并且基于与刺激的空间频率和对比度环绕能量相关的类似假设。CIWaM可以被解释为BIWaM对色觉通道的一个非常简单的扩展，在我们的案例中，色觉通道是在麦克劳德 - 博因顿（lsY）颜色空间中定义的。这个新模型使我们能够在一个单一的数学公式中统一色觉同化和色觉对比效应。通过几个颜色和亮度诱导实验对CIWaM的预测进行了测试，结果表明模型预测与心理物理学数据之间具有可接受的一致性。
