APPEARANCE OF COLORED PATTERNS - PATTERN COLOR SEPARABILITY
APPEARANCE OF COLORED PATTERNS - PATTERN COLOR SEPARABILITY
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DOI：
10.1364/josaa.10.002458
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发表时间：
1993-12-01
影响因子：
1.9
通讯作者：
WANDELL, BA
中科院分区：
文献类型：
--
作者：
POIRSON, AB;WANDELL, BA
我们测量了方波条的颜色随刺激强度和空间频率的变化。观察人员调整均匀贴片的颜色，使其与方波条纹的颜色外观相匹配。我们使用低到中等的方波模式，从1到8周期每度（c/度）。这种匹配不是光感受器匹配，而是建立在更多的中枢神经部位。在假定的中心位置的信号服从几个简单的规律。均匀贴片的锥形对比度与方波刺激强度（颜色均匀性）成正比，与包含不同颜色的等频率方波的叠加（颜色叠加）成正比。我们利用非对称匹配，从第一原理推导出三种图案-颜色可分离的外观路径。这种匹配由两种频谱对立的空间低通机制和一种频谱积极的空间带通机制来解释。我们得出的光谱机制与用完全不同的实验方法得出的亮度和对手机制相似。
We have measured how color appearance of square-wave bars varies with stimulus strength and spatial frequency. Observers adjusted the color of a uniform patch to match the color appearance of the bars in square-wave patterns. We used low-to-moderate square-wave patterns, from 1 to 8 cycles per degree (c/deg). The matches are not photoreceptor matches but rather are established at more central neural sites. The signals at the putative central sites obey several simple regularities. The cone contrast of the uniform patch is proportional to square-wave stimulus strength (color homogeneity) and additive with respect to the superposition of equal-frequency square waves containing different colors (color superposition). We use the asymmetric matches to derive, from first principles, three pattern-color-separable appearance pathways. The matches are explained by two spectrally opponent, spatially low-pass mechanisms and one spectrally positive, spatially band-pass mechanism. The spectral mechanisms that we derive are similar to luminance and opponent mechanisms that are derived with entirely different experimental methods.