Android application with motion detection

We need to make a simple application for android which uses motion detection libraries from open source projects (there are several - and experience with one of these would be significant advantage) Here is what we need from the application The user will open application and see the viewfinder output on the screen. For sake of an example - the hardware this will be used in conjunction with will be the lenovo YOGA tablet, which stands on a desk in front of the user. User can stand back up to 2 metres back from the device. The motion detection algorithm detects a wave (right to left motion of hand) - this detection activates a menu. To clarify, a single motion is filtered out, the user has to wave - side to side, to be recognised as the principal instruction The menu options ( 2 icons) appear either side of the hand - or close around the hand on the viewfinder output If the user motions "over" the right hand icon, a standard android action will be called if the user motions over the left hand icon, another standard android action will be called. At the moment, we only need proof of concept. The project will develop from here if we are satisfied. We can provide some information/libraries/examples on exactly we want - once we find the right person. However, first off, we just need the proof of concept application. as described above. That's it. Experience with motion detection algorithms is strongly advantageous - and extensive android development experience is essential here.