2. About Green Screen
Chroma key compositing, or chroma keying, is a special effects / post-
production
technique for compositing (layering) two images or video streams
together based on
color hues (chroma range). The technique has been used heavily in
many fields to
remove a background from the subject of a photo or video –
particularly the
news casting, motion picture and videogame industries. A color range
in the top layer
is made transparent, revealing another image behind. The chroma
keying technique is
commonly used in video production and post-production. This
technique is also
referred to as color keying, colour-separation overlay (CSO; primarily
by the BBC, or
by various terms for specific color-related variants such as green
3. How did I set up green
screen?
• Make sure there are no crinkles in the
material.
• Then set up the lighitng.
4. How do I light a green
screen?
• You will have two soft boxes lighting the green
screen.
• Then a single light, lighting the model.
5. What is the point in using
green screen in your Web
drama?
• It is cheaper.
• You can use any location you want without
having to actually go there.
• You can exaggerate the size of scenes.
7. What I did
You can see that I have used green screen to edit this
photograph of myself. I started by putting the
photograph on photo shop and I then added another
layer of London I then had to put round to get rid of
the green screen and then merged the two together so
it looked as though I was in front of Big Ben.
