中文摘要：

针对四边形网格模型中数量众多的四边形单元影响图像处理和曲面重构效率的问题,提出一种新的生成各向异性四边形网格算法,以去除冗余单元,减少单元数量。在已形成的四边形网格模型的基础上利用区域划分与多次各向异性法相结合的技术方法,实现了在同一网格模型不同区域设定不同的各向异性,合并数量不同的四边形单元,形成不同的网格密度。实例验证表明,算法在不降低网格模型相关指标的前提下,能够最大程度减少单元数量,对具有平坦区域的网格模型有更好的效果。

英文摘要：

In view of quadrilateral grid model,which has a large number of quadrilateral elements, it influences the efficiency of the image processing and surface reconstruction, presents a new algorithm to generate anisotropic quadrilateral grid, to remove redundant unit and reduce the amount of units.On the basis of quadrilateral grid model, which has been formed, utilizes region division and multiple anisotropy technique combinedly, sets different anisotropy in the different areas of same grid model, and merges different number of quadrilateral elements. Therefore, forming different grid density. Experiment results show that the algorithm, on the premise of maintaining related indicators of the grid model, it is able to minimize the number of units, and has better effect on grid model which has/Zat area