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). If you've seen a movie in the last decade, then you've witnessed the wonder of chroma key compositing For more details about 5 Elements : http://filmmakeriq.com/lessons/5-elements-of-a-great-chromakey/

1. Chroma Key Composting
A Post Production Special Effect

2. Chroma Key – Blue Screen
 For TV and movie
special effects they use
a blue or green screen
 Here just a blue sheet
was used
 Professionally you need
an evenly lit, bright,
pure blue background
 With nothing blue in the
scene

3. Chroma Key with a Green Screen
 Many movies use a green screen background for special
effects
 They use a program to replace the green background with
a different background
 We can do the same thing!

4. Uses
Studios
Movies
TV News
Etc.
Front View
Rear
View
Chroma Key

5. 5 Main Elements for a Great Chroma Key
Space

6. THE SCREEN

7. LIGHTING

8. THE CAMERA

9. POST PRODUCTION

10. POST PRODUCTION