[1]黄贤胜,成卫青,林 伟,等.基于 CT 扫描图像的砂岩石三维建模研究[J].计算机技术与发展,2020,30(07):115-119.[doi:10. 3969 / j. issn. 1673-629X. 2020. 07. 025]
　HUANG Xian-sheng,CHENG Wei-qing,LIN Wei,et al.Research on 3D Modeling of Sandstone Based on CT Scanning Images[J].,2020,30(07):115-119.[doi:10. 3969 / j. issn. 1673-629X. 2020. 07. 025]
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基于 CT 扫描图像的砂岩石三维建模研究()
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《计算机技术与发展》[ISSN:1006-6977/CN:61-1281/TN]

卷:
30
期数:
2020年07期
页码:
115-119
栏目:
应用开发研究
出版日期:
2020-07-10

文章信息/Info

Title:
Research on 3D Modeling of Sandstone Based on CT Scanning Images
文章编号:
1673-629X(2020)07-0115-05
作者:
黄贤胜1 ; 成卫青1 ; 林 伟2 ; 熊生春2
1. 南京邮电大学 计算机学院,江苏 南京 210023; 2. 中国科学院 渗流流体力学研究所,河北 廊坊 065007
Author(s):
HUANG Xian-sheng1 ; CHENG Wei-qing1 ; LIN Wei2 ; XIONG Sheng-chun2
1. School of Computer,Nanjing University of Posts and Telecommunications,Nanjing 210023,China; 2. Institute of Porous Flow and Fluid Mechanics,Chinese Academy of Sciences,Langfang 065007,China
关键词:
三维建模; MC 算法; 形态学; VTK 工具库; STL 文件
Keywords:
3D modeling; MC algorithm; morphology; VTK tool library; STL file
分类号:
TP391
DOI:
10. 3969 / j. issn. 1673-629X. 2020. 07. 025
摘要:
为了得到岩心的快速成型文件,首先对采集到的致密砂岩岩心进行 CT 扫描,得到二维 CT 序列图像。 初步介绍了VTK 工具库和标准三维模型的格式文件—STL 文件, 阐述了三维建模的经典算法—MarchingCubes 算法, 了解了它的基本原理。 然后通过获取到合适的阈值,基于形态学方法对 CT 图像进行数次膨胀和压缩处理,去除图像的虚边,并进行分层灰度化和背景切割等预处理操作。 对 MarchingCubes( MC) 算法中的插值运算进行了简化, 采取的方式是将体素边分为四等份, 提取四等分点使得三角面片顶点坐标和法向量分量值的计算量大幅减小, 利用改进后的 MC 算法对预处理后的图像进行三维重构,生成三维模型和 STL 文件。 实验结果表明,改进后的 MC 算法能够提高三维建模的效率,重构出的模型也保持了相当高的精度。
Abstract:
In order to obtain the rapid prototyping file of the core,the CT scan is performed on the collected tight sandstone core to obtain the 2D CT sequence image. The format file of the VTK tool library and the standard 3D model-STL file is introduced,and the MarchingCubes algorithm,    a classical algorithm for 3D modeling,is expounded and its basic principles are understood. Then, by obtaining the appropriate threshold, the CT image is expanded and compressed several times based on the morphological method to remove the virtual side of the image and  perform preprocessing operations such as layered graying and background cutting. The interpolation operation in the Marching Cubes (MC) is simplified by dividing the voxel side into four equal parts and extracting the four equal points to make the calculation of triangular surface vertex coordinates and the normal vector component value significantly reduced. The improved MC algorithm is used to reconstruct the preprocessed image in three dimensions to generate a three-dimensional model and an STL file. The experiment shows that the improved MC algorithm can improve the efficiency of 3D modeling,and the reconstructed model also maintains a high degree of precision.

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更新日期/Last Update: 2020-07-10