Three-dimensional Acoustic Target Surface Reconstruction Method Based on Marching Cubes

Abstract

Marching Cubes is an isosurface reconstruction algorithm based on volume data. In order to solve the problems of low resolution, rough surface, insufficient texture and stereo sense in the process of three-dimensional acoustic target’s visualization, a method based on Marching Cubes is used to reconstruct the surface of three-dimensional acoustic target in this paper. By constructing the minimal cube in acoustic data field, determining the connection mode, vertex coordinates and normal vectors of triangle elements in the cube where the target contour lies, we establish the target’s three-dimensional surface model, and the reconstruction of three-dimensional acoustic target is realized. The performance and validity of the method are validated by the sea trial data from three-dimensional imaging sonar, and the performance of the method is tested by multi-resolution data, and a three-dimensional surface model of buried target is constructed based on the sea trial data. The results show that the surface reconstruction technology of three-dimensional acoustic target based on marching cubes algorithm has the advantages of simple structure and less computation, and the time-consuming of the algorithm is proportional to the number of sampling points. In the process of three-dimensional acoustic image visualization, surface reconstruction technology can effectively improve the stereo sense and recognition of buried targets.