A Computational Technique to Facilitate the Exposure of Color Reversal Materials on Graphic Arts Cameras

It is often desirable to be able to expose a color reversal material on a conventional graphic arts camera. Traditionally the only choices available for the required color balance correction have been the use of multiple-filter CC filter packs or additive exposure through narrow-band filters. Neither approach is particularly attractive. This paper describes a computational technique to allow a white light exposure to be combined with two trimming exposures (through narrow-band filters) to expose color material in conventional cameras. The resultant exposures are significantly more efficient than those by either of the traditional options.