Colour recovery
Colour recovery (or colour restoration) is a process that restores lost colour to television programmes that were originally recorded on colour videotape but for which only black-and-white copies exist. This is not the same as colourisation, a process by which colour is artificially added to source material that was always black-and-white (or for which no colour information was preserved in the black-and-white copy), or used to enhance poor-quality original sources.