There are two schools of philosophy to handle environment changes: tolerating and adapting. Color constancy refers to the ability to identify a surface as having the same color under considerably different viewing conditions. Although human beings have such ability, the underlying mechanism is still unclear. A few color constancy theories have demonstrated success on real images [21]. On the other hand, the adaptive approach provides an alternative to make a color model useful in a large range. Instead of emphasizing the recovery of the spectral properties of light sources and surfaces that combine to produce the reflected lights, the goal of adaptation is to transform the previously developed color model into the new environment. We have developed a method to adapt the skin-color model. Based on the identification of the skin-color histogram, the modified parameters of the model can be computed as follows: