The fundamental idea of skin color model has been discussed in detail in the previous. A straightforward way to locate a face is to match the model with the input image to find the face color clusters. Each pixel of the original image is converted into the chromatic color space and then compared with the distribution of the skin color model. Since the skin colors occur in a small area of the chromatic color space, the matching process is very fast. Figure 5 shows an example of extracting face region. Figure 5 (a) is the original image. Figure 5 (b) gives the result of color matching. Pixels with a high gray-scale value in Figure 5 (b) correspond to frequently occurring face colors. Although the skin-color region contains the eyes and the lips, there is little difficulty to locate a face based on the result of Figure 5 (b).