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