gesture control in AR

Dear all, I am using unity and Vuforia for my AR application for android mobile/tab. I am scanning a 3D object and showing other virtual 3d objects when scan is successful. I want to select , pick, move these virtual objects by using hand gesture in front of mobile camera. Can you help me how it can be done.Any open source library available for it.,Hi all, I am using unity and vuforia for my application of AR. I am scanning a 3D object and showing other virtual objects in scene when scan is successful. i want to move these virtual objects by picking, placing, clicking through gesture in front of mobile camera, can you guide me how i can do this. Any open source gesture SDK available for it.