Research on Key Technologies of 3D Model Retrieval Based on Semantic

Content-based three-dimensional (3D) model retrieval technology mainly reflects the physical information of model but it can not properly express the semantic information. As to this problem this article will apply user's semantic information features into 3D model retrieval, analyze (discuss) technologies of knowledge extraction in 3D model retrieval based on semantic, semantic, active learning mechanism of semantic retrieval, semantic retrieval of 3D model and other key technologies. On the basis of that, this paper finally proposes research directions in future.