Green Screen technology A.K.A as Chroma Key is the mixing of two videos or frames, in which a small color range (in this case - neon green) is removed from the top layer or made transparent revealing the other image behind it. If you've ever watched the weather on the news, then you've seen a green screen in action.
DOINK: Green Screen has the look of a very simple app, but is really a very powerful piece of video equipment. You can superimpose your students into any image, artwork or video simply by placing one video on another. DOINK: Green Screen also gives you the capability of recording or importing audio for voice-overs or music.
DOINK: Green Screen has the look of a very simple app, but is really a very powerful piece of video equipment. You can superimpose your students into any image, artwork or video simply by placing one video on another. DOINK: Green Screen also gives you the capability of recording or importing audio for voice-overs or music.
Doink: Green screen has two video layers and one audio layer. The wonderful thing about DOInK: green screen is the screen doesn't actually have to be green. It can be any color you choose. The only issue is making sure that the color isn't on part of the video. otherwise this will happen....
Doink Green SCreen app's Help DOcuments
Here's an excerpt from the the Doink Green Screen help documents
Here's how you do it:
To make a video (or image) for Green Screen, you'll need to make a composition or drawing that has a solid-colored background – green, for example. After you import the video into Green Screen, you'll set the "chroma color" to match the background color of your video. Then, Green Screen will automatically "erase" any portions of the video that contain the background color, allowing other images behind the video to show through. To put it another way, the portions of your video that contain the background color become transparent.
To set a background color for your video, open the properties panel by tapping the button on the upper toolbar of the composition editor or the drawing editor. Tap the background color item to open the color selector. You need to be a bit careful when you select your animation's background color.
To make a video (or image) for Green Screen, you'll need to make a composition or drawing that has a solid-colored background – green, for example. After you import the video into Green Screen, you'll set the "chroma color" to match the background color of your video. Then, Green Screen will automatically "erase" any portions of the video that contain the background color, allowing other images behind the video to show through. To put it another way, the portions of your video that contain the background color become transparent.
To set a background color for your video, open the properties panel by tapping the button on the upper toolbar of the composition editor or the drawing editor. Tap the background color item to open the color selector. You need to be a bit careful when you select your animation's background color.
- Use a fully saturated color for your background - i.e., bright colors like green, red, blue, yellow, orange, or magenta. Don't use muted colors, and don't use white, black, or gray. One way to ensure this is to switch to the HSB tool in the color selector, then set the "S" (saturation) and "B" (brightness) values to 100%. After that, you can use the "H" (hue) slider to select a color.
- Choose a color that's different from any of the colors used in the animation itself. Remember, Green Screen will erase everything that uses the background color, so if you choose a color that's used by any of the elements in your animation, those elements will be erased too! For the best results, try to pick a color that's as "far away" from the colors used in your animation as possible.
Jonathan wylie's article on
how to do green screen photography
Tricia Fulgestad's Awesome Tech class
Doink Green Screen: The Basics
What can you use for a green screen?
5 common mistakes of using green screen technology
reducing a shadow on the green screen |
Uneven lighting |
Motion Blur effect |
Wearing Green |
CLipping off the green screen |