subject: Why The Use Of Chroma Keying In Green Screen Process Is So Predominant [print this page] Chroma keying may be something that you have heard about but you may not know how it fits in with today's world. The use of chroma keying in green screen process is important in professional photography, film editing as well as photography. So that you can see why it has such importance I have decided to give you a few examples.
Another name for chroma keying is colour keying. The reason for this is that the process is about putting two images together while taking away either a whole or portion of colour so that the picture or frame can be edited.
In such modern times as I am sure you can imagine there are many circumstances where chroma keying can come in handy. One that everyone will have seen is the weather report where the reporter is standing in front of a seemingly large map. This is where the green screen comes into play and the chroma keying is what is used to add the images. If the reporter was to wear the same colour as the screen behind that item would take on the picture so they would look as though they were wearing part of it. Another use is combining animation to films and the background to video games.
This enables those who want to create a different looking scene to that you could create without this to make a person or character look as though they are in a different country or even at the bottom of the sea when really they are standing against a green background.
So that the computer can understand what you want it to do, the pixels (each and every one) are given codes. This could be anything from one letter, symbol or number upwards. In addition to this so that the programme is able to understand whether you want their to be a change to the person or image that is really there or to the green background codes are allocated to them too.
The alternative references used can depend on two things. That is the programme that you want to use as well as if the programmer wishes to change them. So that the image of choice can be applied to replace the screen these codes are very important.
As film once used so predominantly in photography is used less and less in favour of digital the green backdrop is used more than the blue one. This is because it gives you a much clearer image allowing better graphics whether the image placement is used in gaming, the latest film or even advertising. If it is necissary for the colour green to be either worn by a person or the image you want to merge the colours will clash, so you do not get the desired result. In this case you should use a blue or red screen.
