Research And Realization Of Ontology-based Web Three-dimensional Scene Quickly Build System

With the rapid development of the Internet,a new consumption pattern O2 O was born and developed rapidly,businesses have adopted this model to promote and sell their products.Online and offline combination is the general trend for products.On the other hand,in the people-centered market economy,the product should meet both the common functional requirements and the individual needs and emotional needs of customers.In the scene design area,the traditional approach of hiring a designer has the demand communication gap problem,which leads to the design results do not meet expectations.However,using local three-dimensional modeling software is very difficult and professional.Both of them take a long design cycle and are not able to demonstrate immediate design effect.Therefore,it is necessary to use the Internet to put user needs into the entire design process,so that the design result can satisfy user needs.Web applications have the advantage of quick and easy.However,compared to the local modeling,web modeling is less functional and has more operational constraints,and is also affected by the browser.How to greatly weaken the restriction of web three-dimensional modeling and play to their strengths is a major difficulty.In response to these issues,this paper presents an ontology-based web three-dimensional scene quickly build system,which captures user needs through the Internet,including functional needs and emotional needs,automatically builds the initial design of three-dimensional scenes.Users can modify the initial design online to quickly build the scene which best meets user expectations.The online design can guide the further offline production and marketing.The main research work is as follows:(1)A web three-dimensional scene quickly build framework is proposed.Its core modules include demand formal processing,3D model semi-automatic semantic annotation and three-dimensional scene design construction reasoning.Demand formal processing module analyzes user need and converts to formal representation;3D model semi-automatic semantic annotation module reuses shared semantics to annotate model instances semi-automatically;three-dimensional scene design construction reasoning module optimizes and passes scene design requirements,assigns feature values for sub-models and assembles them into a complete scene.(2)A representation method for scene design requirements based on formal language is proposed.First,the scene design requirement vocabulary is preprocessed to build the synonyms sets.Then,key concepts are extracted to build requirement domain ontology,based on which the semantic needs are transferred to formalized requirements,which are computer understandable.(3)A management method for three-dimensional model semantic information based on ontology is proposed.First,the three-dimensional model knowledge are divided into five levels,from bottom to top are visual knowledge,structure knowledge,domain knowledge,functional knowledge and infection knowledge.Then the combination ontology for three-dimensional model is constructed based on five knowledge levels.Semi-automatic annotation is achieved with the combination ontology as a guide.(4)A method based on semantic knowledge for quickly reasoning a three-dimensional scene is proposed,transferring user requirements into a three-dimensional scene.It includes requirements optimization and decomposition and model combination.Top-level scene demands are broken down to low-level model demands,and existing simple models are assembled to complex scene.At last,for the interior design,a prototype system for quickly web three-dimensional scene building is developed.The results show that the scene design generated by the prototype system is effective.The system is supportive for ordinary users to quickly build a three-dimensional scene online.