一种基于点集体素的多质物体分界面提取方法研究

A method for extracting multi-material interface based on point set voxel

针对传统的等值面提取方法在提取超过三种以上材质的多质物体分界面时,无法一次性提取并保留分界面之间拓扑关系的问题,本文提出了一种基于点集体素的多质物体分界面提取方法。首先,对原始数据进行Gauss滤波去噪以求取Gauss权重矩阵,并基于权重凸显分界点,再通过球形邻域进行点集转换以标识分界点,进而达到分界点标识的目的。其次,采用改进的球面收缩方法,一次性提取出多质物体的多个分界面。最后,基于改进的球面收缩的方法,对提取的多分界面结果进行分割,并使用基于距离的聚类方法对分割结果进行优化。实验结果表明,该方法可以正确有效地提取出多质物体的分界面。

Aiming at the problem that the traditional iso-surface extraction method cannot extract and retain the topological relationship between the interface when extracting the interface of multi-material objects with more than three materials in one time,this paper proposed a method for extracting the interface of multi-material objects based on point set voxel.Firstly,the Gaussian weight matrix is obtained by performing Gaussian filtering and denoising on the original data.The dividing point is highlighted based on the weight.Then the point set conversion is carried out through the spherical neighborhood to identify the dividing point,and achieving the purpose of the dividing point identification.Secondly,the method for improved spherical contraction is adopted to extract multi-interfaces of the multi-material object directly.Finally,the extracted multi-interface results are segmented by the improved spherical point contraction method.At the same time,the segmentation results are further optimized by the method of the distance-based clustering.Experimental results demonstrate that this method can correctly and effectively extract the interface of multi-material objects.