Film colorization

Film colorization (American English; or colourisation [British English], or colourization [Canadian English and Oxford English]) is any process that adds color to black-and-white, sepia, or other monochrome moving-picture images. It may be done as a special effect, to "modernize" black-and-white films, or to restore color segregation. The first examples date from the early 20th century, but colorization has become common with the advent of digital image processing. Provided by Wikipedia