Design And Implementation Of Online Exhibition Hall System Based On Panoramic Image

Digital exhibition is currently very popular form of exhibition,digital exhibition which based on 3d panorama technology use panoramic roaming for digital exhibition hall tour,with technology of low cost,the advantages of wide spread,is an excellent auxiliary way to entity exhibition publicize and build hype,and is also the preferred way to solve the problem of reducing entity exhibition tourists due to force majeure.At present,most panoramic roaming production relies on plug-ins,and the production method is cumbersome and difficult to modify,and roaming quality completely depends on image quality.Therefore,aiming at the shortcomings of the existing production,this thesis proposes the automatic generation method of step-by-step panoramic roaming based on panoramic image,and designs and implements the online exhibition hall system based on panoramic image from the perspective of improving the shortcomings of the existing production method of panoramic roaming.The main work content and research results of this thesis are as follows:(1)Correction of panoramic image with uneven illuminationThe final presentation effect of panoramic roaming mainly depends on the quality of the panoramic image.Since the panoramic image adopts ultra-wide-angle imaging,uneven brightness will inevitably occur.Therefore,it is necessary to perform preprocessing of illumination correction for panoramic images.This thesis used the improved illumination correction algorithm to preprocesses the panoramic image.The experimental results show that the panoramic image corrected by the improved algorithm in this thesis can correct the uneven illumination while ensuring a good global illumination.Improved the quality of panorama roaming.(2)Optimization of panoramic roaming scene rendering and loadingThe panoramic image is rendered on the surface of projection model as the material,which is used for panoramic roaming and surrounding tours.Due to the large file size and high resolution of the panoramic image,if the entire panoramic image is loaded directly,it will cause problems such as long loading time and system freeze.Therefore,based on the LOD(level of detail)technology,this thesis proposes a local texture refresh algorithm to optimize the loading of panoramic images to speed up the display of panoramic images.The experimental results show that the panorama roaming loaded by the local texture refresh algorithm is faster,and has a higher scene rendering efficiency.(3)Proposed the automatic generation method of step-by-step panoramic roaming based on panoramic imageAiming at the problems existing in the current production method of step-by-step panoramic roaming,this thesis proposes and implements an automatic generation method of step-by-step panoramic roaming based on panoramic image.This thesis designs a method of collecting spatial panoramic images according to the roaming planning route,designs a data storage structure of the roaming path model.Then proposes a automatic identification method of roaming scene switching,dynamically structuring of a panoramic roaming.This thesis collects panoramic images of a experimental site.The results show that the method in this thesis can identify relevant scenes well according to the roaming path model,complete scene switching,and realize the automatic generation of step-by-step panoramic roaming.(4)Implement of the online exhibition hall system based on panoramic imageAnalyze the current panoramic roaming production system,summarize the common problems existing in the current panoramic roaming production.According to the system design goals and principles,conduct the demand analysis and functional module design,and implement the system according to the architecture.And then carry out the test of the system.The test results show that the online exhibition hall system based on panoramic images designed in this thesis meets the design goals,has convenient operation,functional integrity,and better performance,which can be used in scenarios such as space roaming and digital exhibitions.