DI
The evolution of the telecine device into film scanning allowed the digital information gathered from a film negative to be of sufficient resolution to transfer back to film. In the late 1990s, the films Pleasantville and O Brother, Where Art Thou? advanced the technology to the point that the creation of a digital intermediate was possible, which greatly expanded the capabilities of the digital telecine colorist in a traditionally film-oriented world. Today, many feature films go through the DI process, while manipulation through photochemical processing is decreasing in use.
In Hollywood, O Brother, Where Art Thou? was the first film to be wholly digitally graded. The negative was scanned with a Spirit DataCine at 2K resolution, then colors were digitally fine-tuned using a Pandora MegaDef color corrector on a Virtual DataCine. The process took several weeks, and the resulting digital master was output to film again with a Kodak laser recorder to create a master internegative.
Read more about this topic: Color Grading