More and more films are undergoing digital processing after shooting, to correct colors and such. Over at BestAvailable, they have a good discussion of the power of the Digital Intermediate, the name for this process, and what you can do with it.
The Digital Intermediate (DI) is a process that many—if not most—films undergo these days (as far as I know), whereby the entire film (even non-visual effects shots) is digitized and worked on by the Director of Photography, the Colorist, and the Director. They do this in a very dark screening room, wherein the Colorist sits at an array of controls that would rival any NASA console.
Specifically they talk about Autodesk’s Lustre, and show some powerful before and after shots.
via Best Available: Adventures in Visual Effects, No. 74:In Which a DI Demonstration is Given.
