Software
Pixie Icon

Pixie

Software for student publishing and creativity.

Wixie Icon

Wixie

Online student publishing and creativity platform.

Frames Icon

Frames

Create animations, digital stories, and stop-motion.

Share Icon

Create web sites, epubs, and presentations.

Professional Learning
Services
Pixie Icon

Pixie

Software for student publishing and creativity.

Wixie Icon

Wixie

Online student publishing and creativity platform.

Frames Icon

Frames

Create animations, digital stories, and stop-motion.

Share Icon

Share

Create web sites, epubs, and presentations.

Tech4Learning Blog
Tech4Learning Blog
Tech4Learning Blog
Tech4Learning Blog

Transport your students with chroma key

Posted by Melinda Kolk on Jan 6, 2015 4:50:07 PM

Using chroma key is a great way to transport your students across time and space. What is chroma key?

When you use chroma key, you combine two images (or videos) together by removing a specific color (or making it transparent) from the top image.

When you use chroma key, the top image includes a main character in front of a single color. You may have heard of 'blue screen" or "green screen" because of the common use of these hues.

Even if you aren't familiar with the techniques, you probably have some idea how it works already. Think about a weather reporter. They stand in front of a map that you know isn't really there. That is because the map, or background changes, and they are really standing in front of a green screen.

Using the idea of chroma key, students can become:

  • explorers in a different time or place
  • protagonists in their own story
  • tour guides at historical sites
  • part of personalize greetings
  • comic book heroes

Frames Animation Tutorial - http://recipes.tech4learning.com/index.php?page_ac=view&type=tutorials&ref_id=545005

While most Tech4Learning users think about using the Chroma Key idea with Frames, you can also achieve similar results using a green screen and the Magic Wand Selector tool in Wixie and Pixie.

Take a picture of your students in front of a green screen. Actually almost any color will do, just not black (no color) or white (all colors). Save the images to your computer or device.

Add the picture using the browse for an image (folder button) in the Library panel. 

chroma-browse-for-image

While it is selected, glue the sticker to the paint later. Click the Glue button on the toolbar (Pixie) or click
lick the Edit button on the toolbar and select Glue from the menu (Wixie).

chroma-button-glue

Select the Paint button on the toolbar to move to the Paint panel.

Choose the Selection tool. Then, select the magic wand option.

chroma-wand

Click the wand selector in the solid hue around the main character. The wand will select the entire area if you have taken the image in front of a solid color.

chroma-sample1

Press the Delete key on the keyobard to remove the background.

Use the Lasso selector to select around the image and convert the painted artwork back into a sticker. Edit (Wixie) or Options (Pixie) menu and Convert to Sticker.

Now you can add backgrounds behind the sticker or even paint pictures!

Topics: digital storytelling, animation

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