ABSTRACT
We have so far considered statistical regularities either without specifically including the notion of color, or deliberately ignoring color and assuming a single luminance channel. Although this is sufficient for studying many of the regularities within natural scenes, color deserves special treatment as it is one of the most informative aspects of the visual world. The use of color in images and art can be used to create a specific mood and to induce particular emotions, it can serve as a signal (e.g., to indicate fruit ripeness in nature or whether we can cross the road in manmade environments) and even give indication about the type of environement or time of the year [786].
