The Research And Application Of Three-dimensional Model Classification Method Based On Multiple Feature Descriptors

We live in a three-dimensional space,and all we feel are three-dimensional objects that actually exist.At the same time,each object has its unique external shape structure and internal molecular structure,thus reflecting its unique three-dimensional sense of space.With the efficient development of internet and economy,3d model appears in people's field of vision,and various information technology applies it in various fields.With the wide application of 3d models,the technical requirements for 3d models are increasing.In the aircraft sheet metal parts industry,the application of three-dimensional model is also gradually emerging.In order to make the engineering work chain more convenient,it is also necessary to manage the part model in the process of aircraft sheet metal parts production and spraying,among which the classification is very important.In order to provide convenience for management after aircraft sheet metal parts are classified,this paper not only studies the method of three-dimensional model classification,but also designs a classification code specification for aircraft sheet metal parts 3d model,so that each aircraft sheet metal part has its unique identity.The main research contents of this paper are as follows:3d model classification method based on multiple feature descriptors: this paper made an in-depth study and investigation on the classification methods of 3d models by domestic and foreign scholars,summarized the advantages and disadvantages of the classification methods,and selected an appropriate 3d model classification method according to the research background of this paper.Firstly,by analyzing the type and feature information of aircraft sheet metal parts,and selecting a variety of feature descriptors to describe them,then dimensionality reduction processing is carried out on the feature vector,and finally clustering operation is carried out on the feature vector according to the clustering algorithm,finally achieving the classification effect of the model.Research on 3d model classification coding: this paper designs the coding specification of 3d model of aircraft sheet metal parts suitable for this study based on the coding specification of informatization,which involves the characteristics and attributes of aircraft sheet metal parts.In the research of classification coding,the coding requirements and specifications are strictly followed.Type identification system for aircraft sheet metal parts: based on the research on classification methods and classification codes of 3d models with multiple feature descriptors,this paper designs the type identification system for aircraft sheet metal parts,and completes the requirement design,function design and database design of the system.The system is reliable,easy to use,maintainable and reusable.Based on the above research,this paper designs a 3d model classification method based on multiple feature descriptors for the features of aircraft sheet metal parts,and designs a classification code specification for aircraft sheet metal parts separately.Finally,the type identification system for aircraft sheet metal parts is designed and implemented.The system mainly includes modules of type management,basic information management and feature information management of aircraft sheet metal parts.Its main core functions include feature vector extraction of 3d model of aircraft sheet metal parts,feature vector reduction and denoising,feature vector clustering,and type coding of aircraft sheet metal parts.