An Augmented Reality Implementation Of Special LBS Precise Positioning On Smart Phone

Along with the rapid development of smart phone or device, their computing,multimedia and network accessing ability have make a difference. The smart phone have lay afoundation to emplement augmented reality providing a set of sesor like camera, GPS, gravity,angle etc.The traditional style of LBS sever on smart phone used to be acquiring GPS parameter ornetwork parameter to get their position, and then push the location relative serviceimformation. But there are shortage both in these two way, GPS signal will be always blockedby the building or even just because the wether, network positioning is not accurate enough.For some purpose, like a police using hand device to capture a criminal inside a building, orjust like a user want to do shopping in the shopping mall, they will be disappointed beacausethere is no GPS signal that tell them where they are.This essay seek to develop a special LBS accurate positioning method using augmentedreality to show results which fusion the digital imformation and real scene. Focus on somekey problems on this research and propose some new solution.On the research of image natural feature recognition, considering the longtage ofsmartphone, I propose a new algorithm so called SE-SURF base on the SURF. This newmothed mainly using the gravity direction to replace the instince direction of feature points.Using this method, the algorithm complexity of SURF descriptor has lowerd downsignificantly. On the research of LBS service, I propose the geography imfomation accquringon Android system, a method of auto choosing a better imfomation, also, propose a sensorfiltor and3D coordinate rebuild algorithm. Finally, I propose a software developing structureof LBS system including a back stage and a Android client and make them into reality.