Three papers:                                    

Yellow, Purple, and Gray                            27 Illuminants

Figure 27.9 (top) Predicted matches based on: (left) Nayatani's illumination hypothesis; (right) Integrated Reflectance crosstalk hypothesis. Observers’ matches (bottom) are consistent with the crosstalk predictions.

Three following movies show the 3-D plot of the data from Figure 29.7.

Observer Matches




The observers report small localized changes in appearance from the 27 different illuminants.

Gray (hard to see) showed the nearly the same match.




    


        Incomplete Adaptation Prediction:               Integrated Reflectance Prediction:


All papers have the same departure from constancy.            Cone crossover: Yellow > Purple> Gray



       Observer data matches cone crossover predictions demonstrating independent color channels for spatial processing.