Keller-Dorian cinematography was French technique from the 1920s for filming movies in color. It used a lenticular process to separate red, green and blue colors and record them on a single frame of black-and-white film. This contrasts with other systems, for example Technicolor, which divided the colors into more than one frame on one or more pieces of film.
The system was used to film several scenes of Abel Gance's Napoléon (1927) and for La Femme et le Pantin by Jacques de Baroncelli (1928). However, projection of this process in movie theaters seems to have been more difficult, so neither of these films was ever presented using this technique. Also, making prints was described by one source as "impossible."
This process was used by Kodak for Kodacolor, introduced in 1928 as the first amateur filmmaker's 16mm film color process available for the home movie market.