Want hexacopter (arducopter) drone modification to optically detect landing pad

Hi there I want someone with experience with the arduino Hexa-B hexacopter who can make modifications to it so that it can optically detect a custom landing pad design and land on it. I would like to be able to use Mission Planner to map a route and then have the hexacopter switch to optical landing mode, detect a landing pad design and land in a fully automated manner. Bid if you have experience!!