三维模型检索中的人机交互与可视化技术研究

Due to the complexity of 3D shapes, the challenge of 3D model retrieval is not just confined into the comparison of shape similarity. This project explores novel methods for query interface, shape retrieval and retrieval result visualization in 3D model search domain..A novel paradigm for 3D query construction will be studied. We propose methods for building a 3D query using 2.5D/3D voxel modeling and ways to enhance the querying by sketch skeleton graphs, which will lead to implement an intuitive and friendly query interface for 3D model retrieval..A Method for local shape feature extraction and comparison will be studied. We construct a volume isometric local shape descriptor by modifying the traditional heat diffusion equation working on 2D manifold. The proposed descriptor is coupled with the 2.5D/3D voxel query interface inherently..Methods for visualizing retrieval results will be studied. These methods will enable users to observe the distribution of results under the metric of similarity assessment and navigate the result space interactively in real time. The proposed methods will help users find the desired 3D model in a more convenient way.

由于三维模型的复杂性，三维模型检索并不仅仅是形状相似性比较算法的问题，本项目从人机交互理论出发，研究新型的三维模型检索系统查询接口、形状检索算法、以及检索结果呈现方式，从而推动三维模型检索技术的发展和成熟。.研究新的三维查询构建方式。提出基于体素的2.5D/3D三维查询构建方法、扩展和增强用户手绘骨架图查询方式。设计出一种直观的、用户友好的三维查询接口。.研究对未完成查询进行匹配的局部形状特征提取和比较算法。对传统二维流形上的热扩散方程做出改进，从而构造出实体空间中的等距变换不变性局部形状描述符，该描述符可与前述体素建模查询接口无缝结合。.研究一套三维模型检索结果集可视化方法。支持用户从可视化三维空间中观察模型在相似性测度下的分布情况，并且可以进行交互式的实时漫游。这种可视化的检索结果集呈现方式能帮助用户更容易地发现所需的模型。