A color enhancement method for use in a video camera imaging system in the context of non-uniform lighting includes an adaptive algorithm for developing a shutter speed control signal, analog gain control signal and color balance signals from pixel luminance over one field of video. The cable also includes a jacket surrounding the insulator, the jacket also defining a plurality of channels having lengths that run along the length of the jacket. The fibers also can be configured as multi-fiber field emission cathodes, and the use of low work function coatings and different tip configurations further improves their performance.