- The Technicolor process as introduced in 1916 was a two-color additive process that employed double projectors to superimpose the two-color components of the picture on the screen, one through a red filter and one through a green filter. In 1919 the process was changed to a two-color subtractive process that employed two prints cemented, base to base. The process was changed again in 1928 to a single print film with the two colors imbibed one on top of the other. In 1932 a third color was added, and since then Technicolor has been a three-color subtractive process producing prints by the imbibition method. Technicolor became a significant option for classical filmmaking.The standard conventions were in place:blue signaled night, red indicated fire and passion, magenta designated romance, green was used for nature.
- The Technicolor Ultra Resolution process was invented by Warner Brothers in collaboration with AOL. It digitally restores Technicolor three-color subtractive process by calibrating the separate colors of the print. Chris Cookson, president of Warner Bros. technical operations and chief technology officer, first envisioned the potential of computers to restore old Technicolor classics and developed a practical approach to the restoration of subtractive color systems. Keren and Sharon Perlmutter from AOL came up with the system, which detected the original colors in each frame of an old film and increased their saturation and density.
- Warner Brothers used the Ultra Resolution process to restore such 1930s Technicolor classics as "The Adventures Of Robin Hood" (1938), "Gone With The Wind" (1939) and "The Wizard Of Oz" (1939). In 2007 the Technicolor Ultra Resolution process was nominated for a Scientific and Technical Academy Award.
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