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Video Sensing in Scratch

From Scratch

Video Sensing in Scratch
5 min3rd4th5th6thTechnology
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Summary

A tutorial on the video-sensing extension, which uses a webcam so a sprite can react to motion in front of the camera -- waving a hand can pop a balloon or move a sprite, no keyboard needed.

Viewer safety

All ages
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Teaching resources

Discussion questions

Discussion

This video shows how a project can react to a person's motion in front of a webcam.

  1. What does the video-sensing extension let a sprite detect?
  2. What real-world action triggers something to happen in the example project?
  3. What kind of project could you build using motion instead of clicks or keys?

Quick work-a-long

Words to know: video sensing, extension, motion.

Try it: Add the video-sensing extension to a project and make a sprite pop when it detects motion above a certain amount.