Method and system for image reconstruction quadrilateral grid based on voxel model

Abstract

The invention discloses an image reconstruction quadrilateral mesh method based on a voxel model. The method includes S1, converting CT images to text formats and performing smoothing processing; S2,selecting that gray value and using the interpolation method to extract the equivalent point as the point cloud data; S3, constructing an initial voxel model according to the stacked cube method, optimizing the voxel model, and extracting an outer surface of the voxel model by depth-first searching; S4, calculating a normal vector of each vertex on the outer surface of the voxel model, and searching a point cloud point closest to the normal vector as a mapping point of the vertex through a domain searching method; S5, adjusting the vertices of the quadrilateral mesh to the center of gravity, remapping the vertices, and performing mesh collapse processing on the quadrilateral mesh. The invention also discloses an image reconstruction quadrilateral mesh system based on a voxel model. By adopting the invention, the quadrilateral mesh can be directly reconstructed from the point cloud, and different voxel cube sizes can be selected to control the fineness of the generated quadrilateral mesh.

Description

technical field [0001] The invention relates to the technical field of graphics and image processing, in particular to a voxel model-based image reconstruction quadrilateral grid method and a voxel model-based image reconstruction quadrilateral grid system. Background technique [0002] 3D reconstruction has long been an important problem in CAD / CAE / CAGD / CAM, and many 3D reconstruction algorithms have emerged in various fields, especially in the field of reverse engineering. In the context of reverse engineering, 3D reconstruction of medical images is also developing. Computed tomography (CT) has become one of the most popular medical imaging techniques due to its high spatial resolution and fast imaging time. Therefore, how to perform 3D reconstruction from CT images has attracted more and more attention in reverse engineering. [0003] Triangular meshes are often used for 3D reconstruction of CT images, and the most typical one is the Marching Cube algorithm. The algori...

AI Technical Summary

Problems solved by technology

However, the existing quadrilateral mesh 3D reconstruction methods often need to generate a triangular mesh as an intermediate medium, which greatly increases the difficulty of reconstruction and the time required for reconstruction

Images