The chroma key - popularly known as "green screen", is a very popular tool in the film and television industry during the making of super productions in the industry. It is quite likely that you have already watched a movie of Hollywood who used this technique to bring more versatility to the film.
In addition, this is an extremely useful tool for producers who intend to use artificial images to compose their sets, avoid large studio displacements and want more freedom to play with their imagination. But have you ever wondered how that green screen works? We prepared a special article to explain!
In a practical way, the green screen effect (chroma key) is the name given to the technique and applicability of replacing the scenario of an audiovisual production with an adapted image or video. Furthermore, as it is necessary to isolate the actors and scenographic objects from the rest, neutral color screens are normally used in the background to facilitate computer processing.
For this reason, it is relatively natural to observe the famous green, blue or even red backgrounds when looking behind the scenes of the recording of any work. On the technical side, editors can replace the solid color with another image. This is one of the reasons filmmakers are able to shoot a scene in space without necessarily traveling beyond Earth.
The chroma key is easy to implement, including live streaming on Twitch, YouTube, Trovo, etc. Currently, most professional video editing software has tools to use it and make manual work easier for its users — such as Adobe Premiere Pro, Final Cut Pro and Magix Vegas.
As mentioned before, the use of green screen in the industry is relatively great to reduce the expenses of an audiovisual production, avoid unnecessary displacements and increase the creative capacity of a work. Several frames that could not be filmed in a traditional setting can be recorded using this resource, offering dynamism and sophistication to the work.
However, it does not prevent some problems from arising as a result of the use of color screens. It is relatively likely that the image has considerable aesthetic loss and simply ceases to look real. Therefore, no matter how much you use a very high quality background, it can become different from the rest.
On the other hand, using chroma key provides fewer lighting options for scenes. This means that, if no correction is made in post-production, there is a chance that the final edit will look too forced or far from reality to the public eye, being that thing quite forced.
Did you know how the famous green screens in cinema worked? Share with the friends!
