Design And Implementation Of3D Model Simplification And Display System On Mobile Terminal

With the rising demand on mobile device. Application of3D Graphic on mobiledevice will become more and more popular. Update on mobile device hardware andrapid development of mobile network lay a good foundation. However, the big andexquisite data used to describe3D model, limitation of the mobile device hardware, andhigh delay of mobile network become the problem to be solved in the domain of3Dmobile application.My thesis work described from three aspects: the first one is the design andimplementation of the3D simplification and display system on mobile terminal. Afterthe requirement analysis of the system, Do the outline design and detail design. UsingUML modeling,draw the use case diagram, class diagram, and sequence diagram. Thesecond aspect is the improvement and implementation of the algorithm in thesimplification module. The adoption of the improved QEM simplification method(Introduce in detail in5.1.2).Do a saliency feature detection and preserve of the detailedinformation of the model. The last work is to compare and analyze the simplificationresult thereby verify the feasibility and availability of the system.The system contains3modules:3D model simplification module on server,transports module and interactive display module on Client based on Android. Thework process is as follow: We do3D model simplification on the server, and upload theprogressive meshes, User on client request interactively. The Client render the modelbased on user requirement. There are two ways for user to request: offline request modeand on-line real-time request, user can choose based on their network environment. The simplification module on server not only reduced data quantities. but alsopreserve the feature of the model due to the adoption of a improved QEM simplification.Then bring a better sense of reality and user experience.Generating the progressivemesh and the LOD display of3D model on the client improve the interactivity of thesystem. Display according to user requirements reduce the pressure of the transmission.shorten the transmission time.