The advent of satellite TV has seen the virtual explosion of television channels, broadcasters, production houses and content producers. This is as cable tv and direct to home platforms have indeed pushed the frontiers of television broadcasting beyond all conceivable boundaries and onto a world scale. It’s no wonder that TV networks across the world utilize the employment of a Green screen.
One of the common systems that are utilized in TV program production is that of employing a Green screen in the background of the studio where a selected program is being shot. This is part of the strategy of chroma key which deals particularly with the removal of certain pictures in the background of the shot and superimposing this with some other image, which is better for the production. As an example, one can use a screen that’s green in colour behind a broadcaster who is reading out the weather news. When viewers watch the program, the green or blue screen as the case might be is replaced with a weather map or scenes of certain cities or satellite images being shown instead.
A Green screen is particularly helpful for chroma key uses, on account of the proven fact that the ordinary human skin tone has very little elements of green in it. This helps in superior quality of image superimposition as well as the replacing of background, without interfering much with the general view of the broadcaster who is standing in the foreground. If there had been any green tint or tone in human skin, parts of the body would became invisible when using the other coloured screen, making the effect quite strange and extremely inappropriate and incongruous.
One of the main advantages of using a Green screen is that it is reasonably straightforward to effect as well as being inexpensive. If one were to use a enormous plasma or HDTV screen behind the broadcaster, the effect may be fabulous, but the cost would be far bigger than employing a green screen. In these days of depression, where cost management is the key, the dice is loaded in favour of using cheaper options.
One can easily make a Green screen that can be employed in TV program production. For this, something as easy as a table material may be employed. This cloth needs to be uniformly painted, so that there are no smudges or uneven areas that would stand out when the show goes on air. One can also employ a plain wall that is evenly painted in green to form the colored background. One of the suggestions to remember when using such a screen is that if the background image is one of trees or forests, green is a more acceptable color to use than blue for the background, while if the image is of the sea or the sky, green wouldn’t be so apt. Employing a green screen is thus an efficient means of making use of chroma key method in TV programme production, which is preferred due to its simplicity and inexpensiveness.
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