green screen understanding

Green screening removes specific sets of colors from footage to make the area transparent for other footage or still backgrounds.

the reason green is used for the green screening is because its a rare color that is not in a lot of areas and also a lot of people do not wear that kind of bright green so that is why green is used in green screens and not blue or red.

green screening can be useful for when wanting to input a different background to a scene an example would be to if it was office scene that was in a new York skyscraper however it wasn't in new York or in a skyscraper they could apply some green screen to the windows then add a view of new York later on due to the removing of the old view.

also green screening is heavily used in weather forecast and when i say heavily used i mean in all professional weather forecasting channels use green screen to display the map of the county/area where the weather is changing.

so with green screen it can behind the presenter and be changing between slides to show developing changes of weather.

  an example of green screen being used with in film is The Avengers,
Green screen is heavily used within the Avengers because it is a action film with destroyed buildings, blown up cars, bullet holes and all round carnage so the look and effect of this could not be done in the streets of new york so the actors had to be in a studio with platforms and props all round with a green coating and all the walls were green too so new york was build around them as they played out the scene.

i found that it was a fantastic result if i didn't research up for the green screen process on the Avengers film i would believe it was film on the streets of new York with minimal green screen, so with the challenges it faced it was a convincing piece of work.