Research And Application Of Mobile Augmented Reality Interactive Learning System

Augmented reality(AR)technology is to match and synthesize the virtual environment with the real environment to achieve the enhancement of the real environment,which is currently being used more and more in the field of education.Mobile Augmented reality(MAR)with the mobile terminal as its core not only has the technical characteristics of augmented reality virtual reality integration,real-time interaction,three-dimensional registration,etc.,but its unique portability also expands teaching application scenarios and realizes educational diversification.,Promoting the balanced development of education has a positive significance.Mobile Augmented reality technology can be combined with related learning theories,technologies and different learning scenarios to develop more innovative teaching products.This article determines the main research content by comparing the current status of the application of augmented reality in the education industry at home and abroad.At present,most mobile augmented reality applications are mainly oriented to basic education,and its key technologies(Three-dimensional registration)are mainly divided into two categories.Among them,methods based on manual identification have problems such as easy registration failure and limited applications,while methods based on natural features are more Well overcome these shortcomings.Based on the above analysis,this article has studied the following:(1)Design the basic framework of the mobile augmented reality interactive learning system,analyze the system implementation process,and study the technical theory of the implementation system,such as key technologies such as three-dimensional registration and virtual-real fusion;perform demand analysis on the system from two aspects of function and performance;based on the above research And analysis to determine the overall technical route of the system and further divide the overall system framework,design system functional modules.(2)In view of the fact that the accuracy of the three-dimensional registration recognition part based on natural features is easily affected by complex textures and cannot well meet the current application requirements that target text,a recognition registration method based on text features is proposed.This method mainly constructs a multi-scale pyramid by combining fixed-factor down-sampling and second-power sampling when processing template images to achieve scale invariance;in order to better obtain text image text feature points,an improved Fast retina keypoint algorithm is used(FREAK)The feature points of the template image and the video frame image are extracted and filtered,and the Hamming distance is matched;finally,the camera pose is calculated according to the feature point pair information to complete the registration.Experimental results show that the improved FREAK algorithm can more accurately extract the corner points of text strokes and reduce the impact of texture features on accuracy;this method can still complete recognition and registration when the target image has scale angle conversion and occlusion,which is more suitable for A mobile augmented reality interactive learning system based on text images.(3)An augmented reality interactive learning system that can be used for intelligent mobile terminals is realized.The system is mainly for college education,and the completed interactive learning,panoramic roaming,video explanation and other functional modules have built a real-time three-dimensional interactive environment for users,which solves the problem of the separation of formal learning environment and informal learning environment in traditional teaching,and expands learning.content.