Green Screen
Objectives: Objectives:
2. Understand what the difference is between a Luma key and a Chroma key.
2. Understand what the difference is between a Luma key and a Chroma key.
By the end of todays lesson students will:By the end of todays lesson students will:
3. Understand the difference between the foreground and background layers of a green screen effect.
3. Understand the difference between the foreground and background layers of a green screen effect.
1. Understand what a key is1. Understand what a key is
E.QE.Q
• How can we use green screen when we create and edit a video?
Green Screen
A green screen allows you to shoot video in front of a screen that is one color ( green, blue, red). Then remove that color to see whatever image is placed on the background layer.
A green screen allows you to shoot video in front of a screen that is one color ( green, blue, red). Then remove that color to see whatever image is placed on the background layer.
Key:Key:Keying in on one color or luminance level and removing it from the image.
Keying in on one color or luminance level and removing it from the image.
Chroma Key:
Chroma Key:
A chroma key is an effect that allows you to remove all of one selected color from an image.
A chroma key is an effect that allows you to remove all of one selected color from an image.
Chroma: saturation of a colorChroma: saturation of a color
http://www.youtube.com/watch?v=DPVpR1yy92khttp://www.youtube.com/watch?v=DPVpR1yy92k
Luma Key:Luma Key:
A luma key is an effect that allows you to remove shades of black and white from an image.
A luma key is an effect that allows you to remove shades of black and white from an image.
Luminance : brightnessLuminance : brightness
Play videoPlay video
Foreground and Background :
Foreground and Background :
When working with a green screen your working with two layers of video.
When working with a green screen your working with two layers of video.
Foreground and Background :Foreground and Background :Foreground Foreground
This is the layer the key will be applied to This is the layer the key will be applied to
Foreground and Background :Foreground and Background :Background Background
This is the layer that will show through where the green is. This is the layer that will show through where the green is. Play Green
Screen tricks
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