Hi, I am planning to build an Arducopter quad, which will be used for surveillance purposes. What I was thinking of implementing is to make the copter follow a vehicle from the entrance of a yard to the office building and while it does this, relay a video feed to a workstation for monitoring. The tracking should be automatic and not in any way manually assisted.What I've thought up so far is to have a miniature wireless cam mounted on the copter, with an optical flow sensor and sonar module.…See More