A look at any image in photoshop reveals that everyday scenery consists of many pixels of different hues. Even in an image of the same basic colors, there appears to be hundreds of different hues of different brightness. However this great contrast is not apparent unless you zoom in on the image. For most visuals, there would appear to be only a handful of different hues in each object. IOW, those different hues that are apparently involved in the image look to be the same. What is going on in the brain here? Are similar hues literally being interpreted as the same by the time the image is processed in the visual cortex?