The main reason for captcha is preventing abuse from robots. However, the blurry code or house number is so hard to recognize some time, and therefore we come back to the origin of captcha - to determine if you are a human, we find some more user-friendly way to finish this.
We display several commands for gestures on the screen and ask the user to do the gestures with the detection of leap-motion. This gestures will be super easy to perform but hard for robots.
Automatically generates the command sequence
Authentication process finished on the server side