Green Screen - PowerPoint PPT Presentation

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Green Screen

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  1. Green Screen

  2. Objectives: By the end of todays lesson students will: 1. Understand what a key is 2. Understand what the difference is between a Luma key and a Chroma key. 3. Understand the difference between the foreground and background layers of a green screen effect.

  3. E.Q • How can we use green screen when we create and edit a video?

  4. 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.

  5. Key: Keying in on one color or luminance level and removing it from the image.

  6. Chroma Key: Chroma: saturation of a color A chroma key is an effect that allows you to remove all of one selected color from an image. http://www.youtube.com/watch?v=DPVpR1yy92k

  7. Luma Key: Luminance : brightness A luma key is an effect that allows you to remove shades of black and white from an image. Play video

  8. Foreground and Background : When working with a green screen your working with two layers of video.

  9. Foreground and Background : Foreground This is the layer the key will be applied to

  10. Foreground and Background : Background This is the layer that will show through where the green is. Play Green Screen tricks