Research On Optical Capture Data Based Virtual-real Interaction Technology

With the development of virtual reality technology,Virtual-real interaction technology is becoming more and more popular.Virtual-real interaction is a kind of fusion technology by the computer generated virtual scene and real world scene,it can obtain motion trail of the real physical objects,which provides natural interaction support for the real scene and virtual scene,and presents to user a new human-computer interaction environment.Traditional Virtual-real interaction technology has poor operating efficiency,experience is not good.In this paper,we mainly study the virtual-real interaction technology based on optical capture data,and finally design and implement a good immersion and high real time efficiency virtual-real interaction system.In this paper,the main research results are as follows:(1)Aiming at the process of real-time human interaction,it maybe have the noise data due to the occlusion of markers.This paper studies and designs kalman filter algorithm to predict and update the positions of marks.Human is a new method of data input,we collect motion data by optical capture and optimize the location of markers.First of all,we analyze the skeleton structure to build body geometry model;Then we construct the hierarchical structure model according to the moving feature of the human;Finally,we estimate the orientation information of the next frame marker and process data by kalman filtering algorithm based on the hierarchical structure of human body;the way can improve the accuracy of tracking.Experimental results show that the method based on kalman filter can make data more smoothly.(2)In order to solve the problem of crossing in the virtual scene,this paper studies and designs a collision detection method based on hierarchical bounding box.Firstly,a coarse segmentation of three-dimensional space can quickly eliminate collision objects may not happen;Secondly,we build and traversal the bounding box to determine whether a collision between objects,then we use the triangular figure to test intersection for the collision of objects.The experimental results show that the collision detection method based on the hierarchical bounding box can effectively improve the collision detection efficiency and prevent the penetration.(3)We design and implement a virtual and real interactive system in order to better apply the two methods.We design several modules:building geometric model,processing data,collision detection,virtual and interactive,in order to implement users control the actions of virtual such as location,orientation,posture control;finally we implemented the system.The running effect of the system shows that virtual-real interaction system based on optical capture data can achieve a better human and rigid,rigid and rigid,human and virtual model virtual-real and virtual-virtual interactions.