A subject image being electronically transferred from a first medium to a second medium is accomplished through tone scale tracking. Three monochromatic channels representing the subject image are generated from the first medium. In a preferred embodiment, an image processing system provides color correction...http://www.google.de/patents/US5387929?utm_source=gb-gplus-sharePatent US5387929 - Method and apparatus for subject image tracking in high definition film-to-video color correction
