How to create a body-tracking shadow effect using mediapipe

Beginners
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1

I want to design an interactive projection where people’s body shadows stay on the screen and become darker the longer they remain in a specific position.

  • I’m using MediaPipe to detect body movements or outlines.
  • I hope to create a dynamic shadow effect that “sticks” to the projection over time.
  • Gradually intensify the shadow’s opacity based on how long the user stays in one spot.

Unfortunately I couldn’t find any similar tutorials online, please send me any tutorial videos or searching keywords that you think would be helpful. Thank you very much!!

2

Hi there,

Everything you need to make it work is encapsulated in this line of your description:

  • Gradually intensify the shadow’s opacity based on how long the user stays in one spot.

That’s pretty much it! :slight_smile:

I am attaching an example where I demonstrate a simple possible approach to make it happen.

PersistentShadow.tox (15.2 KB)

But before opening the example, I encourage you to try to analyze and imagine how you could go about implementing it yourself, as a creative exercise. Tutorials can be handy sometimes, but they take away all the fun of self-learning and experimenting :wink:

Best,
Darien