1. A method of adjusting the color of images captured by a plurality of cameras comprising the steps of: receiving a first image captured by a first camera from the plurality of cameras; analyzing the first image to separate the pixels in the first image into background pixels and foreground pixels; selecting pixels from the background pixels that have a color that is a shade of gray; determining the amount to adjust the colors of the selected pixels to move their colors towards true gray; and providing information for use in adjusting the color components of images from the plurality of cameras.