A Method For Campus Navigation Based On Mobile Augmented Reality

With the fast development of educational technology and information technology,the higher accurate in campus navigation is becoming more and more prominent.In the same time,the rapid growing of diversity buildings and other distributed facilities of colleges or universities make the information on campus more complex that demanding the accurate and efficient navigation App in campus.In addition,with the rapid maturing of augmented reality technology,Apple,Google,Facebook,Microsoft and other giant technology companies have launched the augmented reality products,including wearable augmented reality equipment,augmented reality applications and development toolkits and so on.On the other hand,with the progress of technology in manufacture,the continuous iteration of the processor and the integration of various sensor components make the cost of mobile augmented reality cheaper and more popular,and also provide a mature technical support.However,the practical applications of mobile augmented reality navigation are suffering with the recognition speed,low efficiency in identifying building targets,poor quality of merge displaying with environment and insufficient richness of multiple sources of information,which become the main problem for the acceptance in public.In view of the above problems,this paper studies the recognition technology and fusion displaying technology of the mobile augmented reality,it proposal the POI locating,matching image database building strategy and fusion display of virtual and real images base on public map services.The main contents include:(1)POI information and target building image building strategyFirst,according to the plane characteristics of the campus building distribution and the positioning function of the public map service,the POI information base of other application information,such as the location information and the function information of the typical building,is set up to record the latitude and longitude coordinates of the location,and to record its history and function description information.Based on the classification standard of building type,based on the classification standard of building type,using the principle of visual cone imaging,the minimum surrounding sphere is constructed based on the building type and the influence of the building environment,and the minimum surrounding sphere is constructed with the base map of the building,and the image acquisition points of the augmented reality are calculated by using the equal angle division method.Position,on the basis of ensuring the horizontal and vertical overlap of the cones,the building images of different angles are collected to realize the establishment of an enhanced realistic image library for campus buildings.In addition to the small screen space of mobile devices,and the limited computing and storage capacity of mobile devices,after the completion of the POI information base and the building of the building image library,the building objects are constructed and the convex packets are used as the units to manage the campus scope to improve the response speed and recognition of the present practical navigation application.Efficiency.In real time application,the POI information and image library of the corresponding partitions are loaded according to the location information to realize the rapid identification of the building targets and planning routes in the practical application of mobile augmented reality campus navigation.(2)virtual reality integration mobile augmented reality campus navigation display methodIn view of the virtual reality fusion display,the POI information point location is not accurate,the real scene image and the public map in the mobile application are not well fused,the path orientation is not clear,the model superposition is inaccurate,and the coordinate transformation algorithm between the virtual world display space and the real world is studied,and the transmission is transmitted through the mobile device.The sensor positioning technology realizes the real-time accurate matching of the POI information and the mobile equipment orientation information,the superposition display method on the mobile device screen,combined with the path planning function of the public map service,the real-time matching between the planning line and the real world road,and the fusion display method that automatically adjusts the scale of the public map.Based on the direction guidance based on the inertial sensor,the steering angle of each intersection in the planning path is re calculated,and the steering arrow and the direction of the turning arrow are matched with the actual intersection direction.The navigation information fitting and displaying method is realized.The real time recognition is carried out by the augmented reality registered image library,and the research recognition is based on the mobile setting.Information is adjusted to adjust the layout of architectural information and display the model.Finally,a mobile augmented reality navigation application APP is developed for experimental verification,and the navigation application of multiple lines in the campus is set up to verify the efficiency and accuracy of the navigation method.The actual application experience and data statistics verify the efficiency and accuracy of the augmented reality navigation method in this paper.