Research On Augmented Reality In Virtual Simulation Experiments

People can study and master new technologies more effectively by the helpof experimental education. As a result of developing the virtual reality (VR)technique, virtual experiments become more popular. Most current virtualexperiments are2D interactive interface-based, which exist in someshortcomings such as abstract experimental results, single pattern of human-computer interaction and the dependency on operation platform, thus, it isurgently to popularize experimental education by developing realistic anduniversal virtual experiments which support new interaction styles.This paper studies the augmented reality (AR) technique which is part of thefield of computer vision. The virtual data simulated by computers can be mixedwith real3D space by augmented reality. Compared with common virtualexperiments, the one based AR technique provides users with more realisticexperience and natural human-computer interaction. This paper is mainly dividedinto four parts.Firstly, detailed introduction is presented by studying and investigating intovirtual experiments at home and abroad, and we consider applying AR techniqueinto virtual experiments making it more realistic.Secondly, describe the framework of the virtual experiment based ARtechnique; also we discuss other key technologies, such as image recognition andtracking, three-dimensional reconstruction and3D graphics.Thirdly, the performance of recognizing AR marks is promoted; meanwhile,the stability of natural human-computer interaction is strengthened. The Imagetarget can be recognized and tracked quickly with the random algorithm.However, due to its large volume obtained from training the classifier, it isunbearable for the low memory device and limits the range of application. Takeorientation of image patches into account, we optimize the original random ferns reducing the size of its feature library to1/8to1/16, and name it as orientedferns (OFerns). The technique of3D reconstruction is integrated into the ARapplication to avoid the failure of tracking some AR apparatus.Finally, to test and verify the feasibility of the techniques mentioned above,a set of AR virtual experiment for optics is designed and developed. Theapplication has the advantages of lifelike experimental effect and nature human-computer interaction, also supports cross-platform.