The meanshift method can be used to segment color image. In this method image pixels is treated as points in color space.In each iteration the meanshift vector is calculated for points which are inside the kernel radius.After that the the old kernel location is changed to meanshift vector's position. Color is also updated. This process continues untill both converge.
Meanshift Filterd Image
As the iteration count increases , the same color segment which has same type of colors will get merged together. You can see the effect of meanshift filter on sachin's photo.Its like water painting (not exactly,there are other filters for that. )