Webcam Motion Detection in Flash
A spectacular thing you can do with Flash is detect motion in your web camera. This is done by continuously compare bitmap data from the current image with the previous image.
Here’s a demo where you can try to head the ball - it’s true 
(you’ll need a web camera)
The whole process is described in this tutorial. I also found some other examples. If you have any references on using webcam motion detection, please post it in the comments.
2 Comments
Manejo de Web Cam con ActionScript 3.0 « Andrefy’s Blog on February 7th, 2009
[...] http://www.urdalen.com/blog/?p=214 [...]
Script.it » [AS3.0]Webcam Motion Detection. on January 20th, 2008
[...] etc etc. So we set of on a journey to get to know much more about this subject. We found this link that helpt out [...]