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Wednesday, 9 November 2011

Green Screen

Today we were working with green screen, Ricardo introduced us to the background of them in the industry, why, how and when they are used generally, then we had a chance to take turns filming each other with the aid of them. We found out that a special lens attachment is used to create the effect, as opposed to having literally a 'green screen' behind the subject, this attachment emits a green light from LED bulbs that attaches itself to the subject, pending on how high or low you have the settings, and depending on whether or not the subject has bright green clothing on, which makes it harder to determine where the effect can be placed.


Once we had done the filming in small groups, we were able to then take it to the computers and manipulate it with any background image or video we saw fit to use, which had varying degrees of success and hilarity. I shot three different takes of my subject, each with a varying degree of intensity, ranging from -4 to +4, each meaning different things had to be done in the edit in order to make the image visually pleasing, when it is over exposed it is harder to feather out the intense green colour that surrounds the subject, whereas when it is under exposed it is difficult to achieve the effect without the subject looking like a ghost, therefore a middle ground had to be found whilst filming and then eventually editing.

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