Replacing Green Screen Background w/ a Digital Background

Replacing Green Screen Background w/ a Digital Background: "The technique known as “green screen photography” also known as chroma key photography is familiar to most people who watch television news and weather sometime during the day. However, it was not first developed for the television broadcast industry. The green screen technology was developed for use in the movie industry during the 1940s. Also, though green screen backdrop is the common nomenclature, blue screens are sometimes used too. The most important aspect of this technology is that the background color does not appear at any place in the image."