基于摄影原理的三维纹理重建技术研究

讨论的是基于摄影原理的三维物体表面纹理的重建技术.该技术从国内外研究现状和主要不足出发,对三维物体表面纹理的采集和映射方法进行研究和改进,提出了较为合理的算法.纹理采集过程中分析了回转工作台的结构、纹理采集的原则并建立相关的坐标系;根据拍照和投影变换的原理建立三个坐标系对应点间的关系、推导出坐标变换关系式和转换矩阵;对模型表面微小面片法向量进行均匀化处理;通过计算面片的法向量与纹理采集方向向量的位置关系确定其最佳纹理,最后通过多角度映射达到三维物体表面纹理重建的目的.

3D Texture Reconstruction Technique Based on Photography Principle

The paper discussed the texture reconstruction technique of 3D object surfaces based on photography principle.The technique tried to improve the method of 3D texture collecting and mapping method widely used presently and posed a rational algorithm.Firstly,the paper analyzed turntable's structure,established the principle of collecting object's surface texture and discussed how to set up coordinate systems in the process of texture collection.According to the relation of corresponding points among three coordinate systems based on the principle of photography and projection transformation,the paper deduced coordinate transform formulas and matrixes.Through averaging the geometric normal vectors of the adjacent patches of model face,the best image among all the photos could be decided through calculating the position relationship between the normal vector of each patch and camera position vectors.Finally,3D texture reconstruction of object surfaces should be completed through multi-angle texture mapping.