Design And Implementation Of National Dance Demonstration System Based On 3D Reconstruction

With the continuous development of the traditional national culture,the traditional form of communication with words and pictures cannot meet the needs of people,and the virtual digital represents the direction of future development.In order to solve this problem,this thesis mainly studies the 3D visualization of national dance,so as to achieve the purpose of national dance.In this thesis,we present a Multi-View Stereo reconstruction solution based on the patch surface.Then,the motion capture system is used to collect the data of the national dance movement,and the three dimensional role model is used to generate the animation.The main work of this thesis includes the following parts:(1)Data acquisition and pose estimation.Data acquisition includes the acquisition of two dimensional raw data and the acquisition of BVH data of folk dance.The former according to domestic and foreign scholars to provide part of the standard,through the experiment to constantly modify the shooting mode,and finally put forward the standardization of shooting scheme.The latter uses the motion capture system to collect the dance moves of the national dancers,and converts them into BVH data through a series of processing.In this thesis,the image matching method based on SIFT is adopted.Based on the traditional SIFT feature vector matching,Ransac algorithm is added to eliminate noise.Using the popular Bundler algorithm based on Levenberg-Marquardt,the camera motion parameters and scene structure information can be obtained.(2)Point cloud fusion and rendering.In this thesis,the Patch-based Multi-View Stereo point cloud fusion algorithm is used to build the model of point cloud.The triangular mesh model is generated by 3D Delaunay triangulation instead of traditional Poisson reconstruction algorithm.Through the multi view stereo reconstruction algorithm to obtain the triangular mesh model is relatively rough,this thesis with the help of Zbrush functions ZRemesher and Geometry-Divide to achieve a smooth and simplified model The method of dynamic mapping is used to map the triangular mesh model,which makes the model more realistic.(3)National dance system.Using motion capture to obtain BVH data driven character model to produce national dance animation.The research contents include:the establishment of character skeleton,the introduction of BVH data.In this thesis,the automatic generation of skeleton algorithm based on distance field is used to realize the national dance system.Finally the national dance demonstration based on 3D reconstruction is displayed in Maya.The experimental results show that the system can meet the purpose of digital dance,and it is easy to operate,low cost and good visualization effect.